Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Manuel d'utilisateur

BayRS Version 14.20Part No. 308627-14.20 Rev 00December 2000600 Technology Park DriveBillerica, MA 01821-4130Configuring IP, ARP, RARP, RIP, and OSPF

x308627-14.20 Rev 00Setting the Poll Interval for NBMA Neighbors ...6-32Specifying the Metric C

Configuring IP, ARP, RARP, RIP, and OSPF Services3-40308627-14.20 Rev 00Using the BCCTo enable or disable source route end-station support, go to an I

Configuring and Customizing IP308627-14.20 Rev 003-41 Configuring the MTU for an IP InterfaceYou can set the MTU for an interface to a value less than

Configuring IP, ARP, RARP, RIP, and OSPF Services3-42308627-14.20 Rev 00Configuring an SMDS AddressBy default, if the interface is connected to an SMD

Configuring and Customizing IP308627-14.20 Rev 003-43 Configuring a WAN Address for a Frame Relay NetworkIf an interface is connected to a frame relay

Configuring IP, ARP, RARP, RIP, and OSPF Services3-44308627-14.20 Rev 00To configure broadcast and multicast addresses to be used by the frame relay s

Configuring and Customizing IP308627-14.20 Rev 003-45 When IP flushes a route from the routing table, it also removes the route from the forwarding ta

Configuring IP, ARP, RARP, RIP, and OSPF Services3-46308627-14.20 Rev 00Using Site ManagerTo set the maximum number of entries allowed in the forwardi

Configuring and Customizing IP308627-14.20 Rev 003-47 Using Site ManagerTo delete IP from an interface, complete the following tasks:Configuring the C

Configuring IP, ARP, RARP, RIP, and OSPF Services3-48308627-14.20 Rev 00When you configure the circuitless IP interface, note the following:• You can

Configuring and Customizing IP308627-14.20 Rev 003-49 Using Site ManagerTo configure the circuitless IP interface, complete the following tasks:Choosi

308627-14.20 Rev 00xiNeighbor Parameters for an NBMA Interface ... A-47OSPF Area Parameters ...

Configuring IP, ARP, RARP, RIP, and OSPF Services3-50308627-14.20 Rev 00integer is any number from 1 through 14 or any combination of these numbers en

Configuring and Customizing IP308627-14.20 Rev 003-51 You associate each unnumbered interface with the IP address of any numbered interface on the rou

Configuring IP, ARP, RARP, RIP, and OSPF Services3-52308627-14.20 Rev 00You cannot configure BGP peers, NetBIOS, or BootP directly on an unnumbered in

Configuring and Customizing IP308627-14.20 Rev 003-53 Using the Alternate Associated Address OptionThe alternate associated address option ensures tha

Configuring IP, ARP, RARP, RIP, and OSPF Services3-54308627-14.20 Rev 00Configuring an Adjacent Host AddressAn adjacent host is a device on a locally

Configuring and Customizing IP308627-14.20 Rev 003-55 Table 3-4. BCC Adjacent Host ParametersParameter Value/Default Descriptionstate enabled (default

Configuring IP, ARP, RARP, RIP, and OSPF Services3-56308627-14.20 Rev 00Using Site ManagerTo associate the IP address of an adjacent host with its phy

Configuring and Customizing IP308627-14.20 Rev 003-57 Defining a Static RouteA static route is a manually configured route that specifies a datagram’s

Configuring IP, ARP, RARP, RIP, and OSPF Services3-58308627-14.20 Rev 00You can also configure IP to support equal-cost multipath (ECMP) routes for tr

Configuring and Customizing IP308627-14.20 Rev 003-59 Table 3-5. Required BCC Static Route ParametersThe BCC configures a static route with default va

Configuring IP, ARP, RARP, RIP, and OSPF Services3-60308627-14.20 Rev 00Using Site ManagerTo define a static route, complete the following tasks:cost

Configuring and Customizing IP308627-14.20 Rev 003-61 Defining a Default RouteIf IP receives a data packet with a destination address that it is unabl

Configuring IP, ARP, RARP, RIP, and OSPF Services3-62308627-14.20 Rev 00To force the router to drop the packet for an unmatched destination, you confi

Configuring and Customizing IP308627-14.20 Rev 003-63 Enabling and Disabling Router DiscoveryYou can use the BCC or Site Manager to enable and disable

Configuring IP, ARP, RARP, RIP, and OSPF Services3-64308627-14.20 Rev 00Choosing a Broadcast TypeYou can use the BCC or Site Manager to specify the ty

Configuring and Customizing IP308627-14.20 Rev 003-65 Specifying the Time Interval Between AdvertisementsYou can use the BCC or Site Manager to specif

Configuring IP, ARP, RARP, RIP, and OSPF Services3-66308627-14.20 Rev 00Using Site ManagerTo specify the minimum and maximum number of seconds between

Configuring and Customizing IP308627-14.20 Rev 003-67 Using Site ManagerTo specify the maximum length of time that advertised addresses are considered

Configuring IP, ARP, RARP, RIP, and OSPF Services3-68308627-14.20 Rev 00Using Site ManagerTo specify the preference value of the address as a default

308627-14.20 Rev 004-1 Chapter 4Customizing ARP and RARP ServicesYou can customize the Address Resolution Protocol (ARP) and the Reverse Address Resol

308627-14.20 Rev 00xiiiFiguresFigure 1-1. Network and Host Portions of IP Addresses ...1-3Figure 1-2. Superne

Configuring IP, ARP, RARP, RIP, and OSPF Services4-2308627-14.20 Rev 00Customizing ARPYou can customize the Address Resolution Protocol (ARP) by setti

Customizing ARP and RARP Services308627-14.20 Rev 004-3 Customizing Global ARPYou can use the BCC or Site Manager to customize global ARP as follows:•

Configuring IP, ARP, RARP, RIP, and OSPF Services4-4308627-14.20 Rev 00Using the BCCTo specify whether IP logs all nonlocal ARP source addresses befor

Customizing ARP and RARP Services308627-14.20 Rev 004-5 Using Site ManagerTo customize global ARP, complete the following tasks:Selecting an Address R

Configuring IP, ARP, RARP, RIP, and OSPF Services4-6308627-14.20 Rev 00-- Virtual Address Reply (incoming and outgoing)-- Virtual Address Request (inc

Customizing ARP and RARP Services308627-14.20 Rev 004-7 type is one of the following:arp (default)ddn pdnin-arp arp-in-arp none bfe-ddnprobe arp-probe

Configuring IP, ARP, RARP, RIP, and OSPF Services4-8308627-14.20 Rev 00Selecting an Encapsulation Option for ARP and ProbeIf you select ARP, Probe, or

Customizing ARP and RARP Services308627-14.20 Rev 004-9 Enabling Proxy ARP on an InterfaceProxy ARP allows a router to answer a local ARP request for

Configuring IP, ARP, RARP, RIP, and OSPF Services4-10308627-14.20 Rev 00With Proxy ARP enabled, the router responds with an ARP reply if there is a va

Customizing ARP and RARP Services308627-14.20 Rev 004-11 Using Site ManagerTo enable or disable Proxy ARP, complete the following tasks:Timing Out Ent

Configuring IP, ARP, RARP, RIP, and OSPF Services4-12308627-14.20 Rev 00Using the BCCTo enable or disable the ARP cache timeout feature, go to the IP

Customizing ARP and RARP Services308627-14.20 Rev 004-13 Customizing RARPYou can customize the Reverse Address Resolution Protocol (RARP) by setting p

Configuring IP, ARP, RARP, RIP, and OSPF Services4-14308627-14.20 Rev 00Defining the RARP Mapping TableThe RARP mapping table lists the clients on the

Customizing ARP and RARP Services308627-14.20 Rev 004-15 Disabling and Reenabling RARP GloballyTo globally disable or reenable RARP on all router inte

Configuring IP, ARP, RARP, RIP, and OSPF Services4-16308627-14.20 Rev 00Deleting RARP GloballyTo globally delete RARP from all router interfaces on wh

308627-14.20 Rev 005-1 Chapter 5Customizing RIP ServicesCustomize the Routing Information Protocol (RIP) by setting RIP parameters as described in the

Configuring IP, ARP, RARP, RIP, and OSPF Services5-2308627-14.20 Rev 00Setting the RIP DiameterThe RIP diameter is a maximum hop count that RIP uses t

Customizing RIP Services308627-14.20 Rev 005-3 Customizing a RIP InterfaceWhen you add RIP to an IP interface, the default values for all RIP paramete

Configuring IP, ARP, RARP, RIP, and OSPF Services5-4308627-14.20 Rev 00For example, the following command disables RIP on IP interface 2.2.2.2:rip/2.2

Customizing RIP Services308627-14.20 Rev 005-5 Using the BCCTo specify the RIP version, go to a RIP interface prompt (for example, box; eth 2/2; ip/2.

308627-14.20 Rev 00xvTablesTable 1-1. Network Classes and IP Addresses ...1-2Table 1-2. Subnet M

Configuring IP, ARP, RARP, RIP, and OSPF Services5-6308627-14.20 Rev 00Using Site ManagerTo specify the RIP version, complete the following tasks:Auth

Customizing RIP Services308627-14.20 Rev 005-7 Using the BCCTo configure authentication for RIP Version 2, go to a RIP interface prompt (for example,

Configuring IP, ARP, RARP, RIP, and OSPF Services5-8308627-14.20 Rev 00Supplying RIP Updates on an InterfaceBy default, RIP supplies RIP updates to ne

Customizing RIP Services308627-14.20 Rev 005-9 Using Site ManagerTo disable or reenable RIP updates, complete the following tasks:Specifying the Updat

Configuring IP, ARP, RARP, RIP, and OSPF Services5-10308627-14.20 Rev 00On certain interfaces — for example, on a frame relay interface that has virtu

Customizing RIP Services308627-14.20 Rev 005-11 Sending Triggered UpdatesRIP generates full routing updates at regular intervals. You can also configu

Configuring IP, ARP, RARP, RIP, and OSPF Services5-12308627-14.20 Rev 00Using Site ManagerTo enable or disable triggered updates, complete the followi

Customizing RIP Services308627-14.20 Rev 005-13 Using the BCCTo specify a time-to-live value, go to a RIP interface prompt (for example, box; eth 2/2;

Configuring IP, ARP, RARP, RIP, and OSPF Services5-14308627-14.20 Rev 00Receiving RIP UpdatesBy default, RIP listens for routing updates on every inte

Customizing RIP Services308627-14.20 Rev 005-15 Supplying a Default Route on an InterfaceWhen the routing table does not contain the route to a partic

xvi308627-14.20 Rev 00Table D-1. Internal Backbone Router 1 ... D-3Table D-2. Area

Configuring IP, ARP, RARP, RIP, and OSPF Services5-16308627-14.20 Rev 00For example, the following command causes RIP to supply a default route on IP

Customizing RIP Services308627-14.20 Rev 005-17 Listening for a Default RouteBy default, RIP ignores inbound advertisements of a default route (0.0.0.

Configuring IP, ARP, RARP, RIP, and OSPF Services5-18308627-14.20 Rev 00Configuring a RIP Interface for Dial-Optimized RoutingDial-optimized routing i

Customizing RIP Services308627-14.20 Rev 005-19 Using the BCCTo specify the frequency at which RIP generates a full update, go to a RIP interface prom

Configuring IP, ARP, RARP, RIP, and OSPF Services5-20308627-14.20 Rev 00Specifying a Timeout PeriodBy default, RIP waits 90 seconds for an update from

Customizing RIP Services308627-14.20 Rev 005-21 Specifying a Holddown PeriodWhen RIP determines that a network is unreachable, RIP continues to advert

Configuring IP, ARP, RARP, RIP, and OSPF Services5-22308627-14.20 Rev 00Using Site ManagerTo specify the holddown period, complete the following tasks

Customizing RIP Services308627-14.20 Rev 005-23 Specifying Frame Relay Services for Adjacent HostsYou can configure the router to wait for frame relay

Configuring IP, ARP, RARP, RIP, and OSPF Services5-24308627-14.20 Rev 00Using Site ManagerTo specify whether frame relay SVCs are established for all

Customizing RIP Services308627-14.20 Rev 005-25 Using Site ManagerTo delete RIP from an interface, complete the following tasks:Configuring RIP Accept

308627-14.20 Rev 00xvii PrefaceThis guide describes Internet Protocol (IP) services and what you do to start and customize IP services on a Nortel Net

Configuring IP, ARP, RARP, RIP, and OSPF Services5-26308627-14.20 Rev 00The following topics describe how to configure RIP accept and announce policie

Customizing RIP Services308627-14.20 Rev 005-27 Table 5-2 lists the parameters and values that you can enter.For example, the following command sets t

Configuring IP, ARP, RARP, RIP, and OSPF Services5-28308627-14.20 Rev 00Using Site ManagerTo create an accept policy, complete the following tasks:Sit

Customizing RIP Services308627-14.20 Rev 005-29 Specifying Match Criteria for a RIP Accept PolicyYou can use the BCC or Site Manager to specify match

Configuring IP, ARP, RARP, RIP, and OSPF Services5-30308627-14.20 Rev 00For example, the following command specifies RIP interface 2.2.3.3 on this rou

Customizing RIP Services308627-14.20 Rev 005-31 Supplying Modification Values for a RIP Accept PolicyYou can use the BCC or Site Manager to supply a v

Configuring IP, ARP, RARP, RIP, and OSPF Services5-32308627-14.20 Rev 00Defining a RIP Announce PolicyTo define a new RIP announce policy, you must do

Customizing RIP Services308627-14.20 Rev 005-33 To customize the default values for the policy, enter:<parameter> <value>Table 5-4 lists t

Configuring IP, ARP, RARP, RIP, and OSPF Services5-34308627-14.20 Rev 00Specifying Match Criteria for a RIP Announce PolicyYou can use the BCC or Site

Customizing RIP Services308627-14.20 Rev 005-35 Table 5-5 lists the parameters and values that you can enter.Table 5-5. BCC Match Parameters for RIP A

Configuring IP, ARP, RARP, RIP, and OSPF Servicesxviii308627-14.20 Rev 00Text ConventionsThis guide uses the following text conventions:angle brackets

Configuring IP, ARP, RARP, RIP, and OSPF Services5-36308627-14.20 Rev 00bgp-peer* List of IP addressesSpecifies the IP address of one or more BGP peer

Customizing RIP Services308627-14.20 Rev 005-37 For example, the following command sequence configures the router not to advertise networks 140.10.10.

Configuring IP, ARP, RARP, RIP, and OSPF Services5-38308627-14.20 Rev 00Using Site ManagerTo specify match criteria for a RIP announce policy, complet

Customizing RIP Services308627-14.20 Rev 005-39 Supplying Modification Values for a RIP Announce PolicyYou can use the BCC or Site Manager to supply a

Configuring IP, ARP, RARP, RIP, and OSPF Services5-40308627-14.20 Rev 00For example, the following command sequence specifies an override metric of 5

308627-14.20 Rev 006-1 Chapter 6Customizing OSPF ServicesYou customize OSPF by setting OSPF parameters as described under the following topics:Topic P

Configuring IP, ARP, RARP, RIP, and OSPF Services6-2308627-14.20 Rev 00Customizing OSPF Global ParametersOSPF global parameters apply to all OSPF inte

Customizing OSPF Services308627-14.20 Rev 006-3 Disabling and Reenabling OSPF on the RouterWhen you start OSPF on the router, OSPF is automatically en

Configuring IP, ARP, RARP, RIP, and OSPF Services6-4308627-14.20 Rev 00Supplying an OSPF Router IDEach router configured with OSPF has an OSPF router

Customizing OSPF Services308627-14.20 Rev 006-5 Using Site ManagerTo change the OSPF router ID, complete the following tasks:Configuring the Soloist o

Preface308627-14.20 Rev 00xix AcronymsThis guide uses the following acronyms:italic text Indicates new terms, book titles, and variables in command sy

Configuring IP, ARP, RARP, RIP, and OSPF Services6-6308627-14.20 Rev 00For example, the following command specifies slots 2, 3, and 4 for the OSPF sol

Customizing OSPF Services308627-14.20 Rev 006-7 Using the BCCTo configure the router as a boundary router, go to the global OSPF prompt (for example,

Configuring IP, ARP, RARP, RIP, and OSPF Services6-8308627-14.20 Rev 00Configuring the Metric Type for an ASE AdvertisementEach ASE advertisement that

Customizing OSPF Services308627-14.20 Rev 006-9 Figure 6-1. OSPF ASE RoutesBy default, an OSPF boundary router generates a type 2 metric for BGP, EGP,

Configuring IP, ARP, RARP, RIP, and OSPF Services6-10308627-14.20 Rev 00Using the BCC or Site Manager, you can configure a boundary router to use the

Customizing OSPF Services308627-14.20 Rev 006-11 Choosing a Tag Generation Method for an ASE AdvertisementAn OSPF AS external route advertisement incl

Configuring IP, ARP, RARP, RIP, and OSPF Services6-12308627-14.20 Rev 00Figure 6-2. AS External Route TagBGPR1R2R3R4R5R6R7R8 R11R12R9R13R14R10OSPFBGPR

Customizing OSPF Services308627-14.20 Rev 006-13 You can use the BCC or Site Manager to choose the tag generation method.Using the BCCTo set the tag g

Configuring IP, ARP, RARP, RIP, and OSPF Services6-14308627-14.20 Rev 00Setting the Holddown TimerThe holddown timer specifies the delay that occurs a

Customizing OSPF Services308627-14.20 Rev 006-15 Setting a Maximum Number of Refreshes for Summary and ASE LSAsThe router refreshes unchanged summary

ii308627-14.20 Rev 00 Copyright © 2000 Nortel NetworksAll rights reserved. December 2000.The information in this document is subject to change without

Configuring IP, ARP, RARP, RIP, and OSPF Servicesxx308627-14.20 Rev 00BGP Border Gateway ProtocolBootP Bootstrap ProtocolBR border routerCIDR classles

Configuring IP, ARP, RARP, RIP, and OSPF Services6-16308627-14.20 Rev 00Configuring Message LoggingOSPF maintains a log for OSPF messages.By default,

Customizing OSPF Services308627-14.20 Rev 006-17 Using the BCCTo specify the messages that OSPF writes to the log, go to the global OSPF prompt (for e

Configuring IP, ARP, RARP, RIP, and OSPF Services6-18308627-14.20 Rev 00Configuring External Route PreferenceBy default, when OSPF receives multiple A

Customizing OSPF Services308627-14.20 Rev 006-19 Customizing OSPF on an IP InterfaceWhen you add OSPF to an IP interface, the default parameters are i

Configuring IP, ARP, RARP, RIP, and OSPF Services6-20308627-14.20 Rev 00Disabling and Reenabling OSPF on an InterfaceOSPF is automatically enabled whe

Customizing OSPF Services308627-14.20 Rev 006-21 Changing the Area IDIn an AS that contains multiple areas, each OSPF interface is configured with the

Configuring IP, ARP, RARP, RIP, and OSPF Services6-22308627-14.20 Rev 00Specifying the Interface TypeOSPF supports the following types of interfaces:•

Customizing OSPF Services308627-14.20 Rev 006-23 By default, OSPF assumes that the interface is attached to a broadcast network. You can use the BCC o

Configuring IP, ARP, RARP, RIP, and OSPF Services6-24308627-14.20 Rev 00Using Site ManagerTo change the interface type, complete the following tasks:S

Customizing OSPF Services308627-14.20 Rev 006-25 Using the BCCTo set a router priority value, go to an OSPF interface prompt (for example, box; eth 2/

Preface308627-14.20 Rev 00xxi Related PublicationsFor more information about IP services, refer to the following publications:• Reference for BCC IP s

Configuring IP, ARP, RARP, RIP, and OSPF Services6-26308627-14.20 Rev 00Estimating the Transit DelayBy default, OSPF assigns a transmission delay of 1

Customizing OSPF Services308627-14.20 Rev 006-27 Setting the Retransmit IntervalThe retransmit interval is the number of seconds between link state ad

Configuring IP, ARP, RARP, RIP, and OSPF Services6-28308627-14.20 Rev 00Using Site ManagerTo set the retransmit interval, complete the following tasks

Customizing OSPF Services308627-14.20 Rev 006-29 Each type of subnet has a typical Hello interval. Table 6-4 lists the suggested settings for subnet t

Configuring IP, ARP, RARP, RIP, and OSPF Services6-30308627-14.20 Rev 00Setting the Dead IntervalThe dead interval is the number of seconds that OSPF

Customizing OSPF Services308627-14.20 Rev 006-31 You can use the BCC or Site Manager to specify a dead interval.Using the BCCTo set the dead interval,

Configuring IP, ARP, RARP, RIP, and OSPF Services6-32308627-14.20 Rev 00Setting the Poll Interval for NBMA NeighborsThe poll interval is the longest t

Customizing OSPF Services308627-14.20 Rev 006-33 Specifying the Metric CostFor OSPF, the best path is the one that offers the least-cost metric. By de

Configuring IP, ARP, RARP, RIP, and OSPF Services6-34308627-14.20 Rev 00Table 6-6 lists the suggested values for the metric cost parameter by network

Customizing OSPF Services308627-14.20 Rev 006-35 Using Site ManagerTo specify a metric cost, complete the following tasks:Specifying the MTU SizeOSPF

Configuring IP, ARP, RARP, RIP, and OSPF Servicesxxii308627-14.20 Rev 00How to Get HelpIf you purchased a service contract for your Nortel Networks pr

Configuring IP, ARP, RARP, RIP, and OSPF Services6-36308627-14.20 Rev 00Using the BCCTo set the MTU size, go to an OSPF interface prompt (for example,

Customizing OSPF Services308627-14.20 Rev 006-37 Specifying the MTU Mismatch DetectYou can configure the action that the router takes if it finds a pa

Configuring IP, ARP, RARP, RIP, and OSPF Services6-38308627-14.20 Rev 00For example, the following command disables MTU checking for OSPF on IP interf

Customizing OSPF Services308627-14.20 Rev 006-39 Using the BCCTo configure a neighbor on an NBMA interface, go to an OSPF interface prompt (for exampl

Configuring IP, ARP, RARP, RIP, and OSPF Services6-40308627-14.20 Rev 00Using Site ManagerTo configure an OSPF neighbor on an NBMA interface, complete

Customizing OSPF Services308627-14.20 Rev 006-41 Deleting OSPF from an IP InterfaceTo delete OSPF from an interface on which it is currently configure

Configuring IP, ARP, RARP, RIP, and OSPF Services6-42308627-14.20 Rev 00Configuring AreasYou configure an OSPF area by setting the parameters describe

Customizing OSPF Services308627-14.20 Rev 006-43 For example, the following command sequence creates OSPF area 0.0.0.2 and displays the default area p

Configuring IP, ARP, RARP, RIP, and OSPF Services6-44308627-14.20 Rev 00Disabling and Reenabling an AreaWhen you configure an OSPF area, it is automat

Customizing OSPF Services308627-14.20 Rev 006-45 Configuring AuthenticationOSPF can provide a measure of security for an area with authentication. If

308627-14.20 Rev 001-1 Chapter 1IP Concepts, Terminology, and FeaturesThis chapter introduces concepts and terminology used in this guide.Topic PageIP

Configuring IP, ARP, RARP, RIP, and OSPF Services6-46308627-14.20 Rev 00Using Site ManagerTo enable authentication on an OSPF area and to set a passwo

Customizing OSPF Services308627-14.20 Rev 006-47 Configuring a Summary RouteOSPF border routers generate summary advertisements for their attached are

Configuring IP, ARP, RARP, RIP, and OSPF Services6-48308627-14.20 Rev 00By default, the metric is set to 0. OSPF uses this value to advertise the smal

Customizing OSPF Services308627-14.20 Rev 006-49 Configuring a Stub AreaA stub area does not import ASEs and may or may not import internal route summ

Configuring IP, ARP, RARP, RIP, and OSPF Services6-50308627-14.20 Rev 00Using the BCCTo configure an area as a stub, go to an OSPF area prompt (for ex

Customizing OSPF Services308627-14.20 Rev 006-51 Using Site ManagerTo configure an OSPF stub area, complete the following tasks:Configuring a Not-So-S

Configuring IP, ARP, RARP, RIP, and OSPF Services6-52308627-14.20 Rev 00You can configure NSSA type 7 address ranges to allow OSPF NSSA border routers

Customizing OSPF Services308627-14.20 Rev 006-53 For example, the following command sequence:• Configures area 0.0.0.1 as an NSSA• Enables the origina

Configuring IP, ARP, RARP, RIP, and OSPF Services6-54308627-14.20 Rev 00area/0.0.0.1# area-type nssaarea/0.0.0.1# nssa-default-originate enabledarea/0

Customizing OSPF Services308627-14.20 Rev 006-55 Configuring an NSSA Address RangeIf you configured one or more announce policies to advertise routing

Configuring IP, ARP, RARP, RIP, and OSPF Services1-2308627-14.20 Rev 00IP AddressesAn IP address consists of 32 bits that have the form network.host.

Configuring IP, ARP, RARP, RIP, and OSPF Services6-56308627-14.20 Rev 00To change the default values for an OSPF NSSA address range, enter:<area_pa

Customizing OSPF Services308627-14.20 Rev 006-57 6. Set the following parameters:• NSSA Range Net• NSSA Range MaskClick on Help or see the parameter d

Configuring IP, ARP, RARP, RIP, and OSPF Services6-58308627-14.20 Rev 00Configuring an Area Border RouterEach OSPF area is connected to the backbone b

Customizing OSPF Services308627-14.20 Rev 006-59 By definition, a border router has an interface to the backbone and interfaces to one or more other a

Configuring IP, ARP, RARP, RIP, and OSPF Services6-60308627-14.20 Rev 00Virtual links can be configured between any pair of area border routers that h

Customizing OSPF Services308627-14.20 Rev 006-61 To configure a virtual link to the backbone:1.Identify the transit area that supports the virtual lin

Configuring IP, ARP, RARP, RIP, and OSPF Services6-62308627-14.20 Rev 00To change the default values for an OSPF virtual link, enter:<parameter>

Customizing OSPF Services308627-14.20 Rev 006-63 Using Site ManagerTo configure an OSPF virtual link to the backbone, complete the following tasks:Sit

Configuring IP, ARP, RARP, RIP, and OSPF Services6-64308627-14.20 Rev 00Configuring OSPF Accept and Announce PoliciesOSPF requires that all routers in

Customizing OSPF Services308627-14.20 Rev 006-65 Defining an OSPF Accept PolicyTo define a new OSPF accept policy, you must do the following:• Supply

IP Concepts, Terminology, and Features308627-14.20 Rev 001-3 Figure 1-1. Network and Host Portions of IP AddressesYou specify IP addresses in dotted-d

Configuring IP, ARP, RARP, RIP, and OSPF Services6-66308627-14.20 Rev 00Table 6-11 lists the parameters and values that you can enter. For example, th

Customizing OSPF Services308627-14.20 Rev 006-67 Using Site ManagerTo create an accept policy, complete the following tasks:Site Manager ProcedureYou

Configuring IP, ARP, RARP, RIP, and OSPF Services6-68308627-14.20 Rev 00Specifying Match Criteria for an OSPF Accept PolicyYou can use the BCC or Site

Customizing OSPF Services308627-14.20 Rev 006-69 ExamplesThe following command sequence specifies ASE route type 2 as a match for policy pol_1:accept/

Configuring IP, ARP, RARP, RIP, and OSPF Services6-70308627-14.20 Rev 00Defining an OSPF Announce PolicyTo define a new OSPF announce policy, you must

Customizing OSPF Services308627-14.20 Rev 006-71 Using Site ManagerTo create an OSPF announce policy, complete the following tasks:Table 6-13. BCC Def

Configuring IP, ARP, RARP, RIP, and OSPF Services6-72308627-14.20 Rev 00Specifying Match Criteria for an OSPF Announce PolicyYou can use the BCC or Si

Customizing OSPF Services308627-14.20 Rev 006-73 Table 6-14 lists the parameters and values that you can enter.Table 6-14. BCC Match Parameters for OS

Configuring IP, ARP, RARP, RIP, and OSPF Services6-74308627-14.20 Rev 00egp-peer* List of IP addressesSpecifies the IP address of one or more EGP peer

Customizing OSPF Services308627-14.20 Rev 006-75 Using Site ManagerTo specify match criteria for an OSPF announce policy, complete the following tasks

Configuring IP, ARP, RARP, RIP, and OSPF Services1-4308627-14.20 Rev 00Subnet AddressingThe concept of subnetworks (or subnets) extends the IP address

Configuring IP, ARP, RARP, RIP, and OSPF Services6-76308627-14.20 Rev 00Specifying Modification Values for an OSPF Announce PolicyYou can use the BCC

Customizing OSPF Services308627-14.20 Rev 006-77 For example, the following command sequence sets the propagate bit in type 7 LSAs of routes that matc

Configuring IP, ARP, RARP, RIP, and OSPF Services6-78308627-14.20 Rev 00Using Site ManagerTo specify an override value for an OSPF announce policy, co

308627-14.20 Rev 00A-1 Appendix ASite Manager ParametersThis appendix contains the Site Manager parameter descriptions for IP, RARP, OSPF, and RIP ser

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-2308627-14.20 Rev 00The Technician Interface allows you to modify parameters by issuing set and com

Site Manager Parameters308627-14.20 Rev 00A-3 Parameter: Subnet MaskPath: Select IP from the Select Protocols window and click on OK.Default: NoneOpti

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-4308627-14.20 Rev 00IP Interface ParametersSee Configuring ATM Services for information about the f

Site Manager Parameters308627-14.20 Rev 00A-5 Parameter: MaskPath: Configuration Manager > Protocols > IP > InterfacesDefault: Subnet mask sp

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-6308627-14.20 Rev 00Parameter: Cost Path: Configuration Manager > Protocols > IP > Interfa

Site Manager Parameters308627-14.20 Rev 00A-7 Parameter: ASBPath: Configuration Manager > Protocols > IP > InterfacesDefault: DisabledOptions

IP Concepts, Terminology, and Features308627-14.20 Rev 001-5 You construct a subnet mask as follows:• Assign a value of 1 to each of the 8, 16, or 24

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-8308627-14.20 Rev 00Parameter: Address Resolution TypePath: Configuration Manager > Protocols &g

Site Manager Parameters308627-14.20 Rev 00A-9 Parameter: ProxyPath: Configuration Manager > Protocols > IP > InterfacesDefault: DisabledOptio

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-10308627-14.20 Rev 00Parameter: Upd Xsum OnPath: Configuration Manager > Protocols > IP >

Site Manager Parameters308627-14.20 Rev 00A-11 Parameter: TR End StationPath: Configuration Manager > Protocols > IP > InterfacesDefault: Off

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-12308627-14.20 Rev 00Parameter: AMRPath: Configuration Manager > Protocols > IP > Interfac

Site Manager Parameters308627-14.20 Rev 00A-13 Parameter: Ethernet Arp EncapsPath: Configuration Manager > Protocols > IP > InterfacesDefault

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-14308627-14.20 Rev 00Parameter: SMDS Arp Request AddressPath: Configuration Manager > Protocols

Site Manager Parameters308627-14.20 Rev 00A-15 Parameter: FRM Cast 1 DLCIPath: Configuration Manager > Protocols > IP > InterfacesDefault: 0O

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-16308627-14.20 Rev 00Parameter: Slot MaskPath: Configuration Manager > Protocols > IP > In

Site Manager Parameters308627-14.20 Rev 00A-17 Parameter: Forward Cache SizePath: Configuration Manager > Protocols > IP > InterfacesDefault:

Configuring IP, ARP, RARP, RIP, and OSPF Services1-6308627-14.20 Rev 00Table 1-2 lists the range of possible subnet masks for Class B and Class C addr

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-18308627-14.20 Rev 00IP Global ParametersParameter: EnablePath: Configuration Manager > Protocol

Site Manager Parameters308627-14.20 Rev 00A-19 Parameter: ARP ForwardingPath: Configuration Manager > Protocols > IP > GlobalDefault: Forward

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-20308627-14.20 Rev 00Parameter: Nonlocal ARP DestinationPath: Configuration Manager > Protocols

Site Manager Parameters308627-14.20 Rev 00A-21 Parameter: RIP DiameterPath: Configuration Manager > Protocols > IP > GlobalDefault: 15Options

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-22308627-14.20 Rev 00Parameter: Zero Subnet EnablePath: Configuration Manager > Protocols > I

Site Manager Parameters308627-14.20 Rev 00A-23 Parameter: Estimated NetworksPath: Configuration Manager > Protocols > IP > GlobalDefault: 0Op

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-24308627-14.20 Rev 00Parameter: Enable Default Route for SubnetsPath: Configuration Manager > Pr

Site Manager Parameters308627-14.20 Rev 00A-25 Parameter: RIP Maximum Equal Cost PathsPath: Configuration Manager > Protocols > IP > GlobalDe

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-26308627-14.20 Rev 00Parameter: Enable ISP Mode SupportPath: Configuration Manager > Protocols &

Site Manager Parameters308627-14.20 Rev 00A-27 Static Route ParametersParameter: EnablePath: Configuration Manager > Protocols > IP > Static

IP Concepts, Terminology, and Features308627-14.20 Rev 001-7 Supernet AddressingA supernet is a group of networks identified by contiguous network add

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-28308627-14.20 Rev 00Parameter: Address MaskPath: Configuration Manager > Protocols > IP >

Site Manager Parameters308627-14.20 Rev 00A-29 Parameter: PreferencePath: Configuration Manager > Protocols > IP > Static RoutesDefault: 16Op

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-30308627-14.20 Rev 00Adjacent Host ParametersParameter: EnablePath: Configuration Manager > Prot

Site Manager Parameters308627-14.20 Rev 00A-31 Parameter: Next Hop Interface AddrPath: Configuration Manager > Protocols > IP > Adjacent Host

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-32308627-14.20 Rev 00Parameter: Remote Party Sub-AddressPath: Configuration Manager > Protocols

Site Manager Parameters308627-14.20 Rev 00A-33 Router Discovery ParametersParameter: EnablePath: Configuration Manager > Protocols > IP > Rou

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-34308627-14.20 Rev 00Parameter: Maximum IntervalPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-35 RARP ParametersParameter: Enable/DisablePath: Configuration Manager > Protocols > IP > Reverse

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-36308627-14.20 Rev 00OSPF ParametersParameter: IP AddressPath: Configuration Manager > Protocols

Site Manager Parameters308627-14.20 Rev 00A-37 OSPF Global ParametersSee Configuring IP Multicasting and Multimedia Services for information about the

308627-14.20 Rev 00iiiNortel Networks NA Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using t

Configuring IP, ARP, RARP, RIP, and OSPF Services1-8308627-14.20 Rev 00Classless Interdomain RoutingClassless interdomain routing (CIDR) is an address

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-38308627-14.20 Rev 00Parameter: AS Boundary RouterPath: Configuration Manager > Protocols > I

Site Manager Parameters308627-14.20 Rev 00A-39 Parameter: OSPF SlotPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > GlobalDefau

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-40308627-14.20 Rev 00Parameter: Primary Log MaskPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-41 OSPF Interface ParametersSee Configuring IP Multicasting and Multimedia Services for information about

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-42308627-14.20 Rev 00Parameter: TypePath: Configuration Manager > Protocols > IP > OSPF/MO

Site Manager Parameters308627-14.20 Rev 00A-43 Parameter: Transit DelayPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > Interfa

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-44308627-14.20 Rev 00Parameter: Hello IntervalPath: Configuration Manager > Protocols > IP &g

Site Manager Parameters308627-14.20 Rev 00A-45 Parameter: Poll IntervalPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > Interfa

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-46308627-14.20 Rev 00Parameter: PasswordPath: Configuration Manager > Protocols > IP > OSP

Site Manager Parameters308627-14.20 Rev 00A-47 Neighbor Parameters for an NBMA InterfaceParameter: MTU Mismatch Detect EnablePath: Configuration Manag

IP Concepts, Terminology, and Features308627-14.20 Rev 001-9 Figure 1-3. Internetwork Segmented into Three Autonomous SystemsRouter5Router6Router7Rout

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-48308627-14.20 Rev 00Parameter: EnablePath: Configuration Manager > Protocols > IP > OSPF/

Site Manager Parameters308627-14.20 Rev 00A-49 OSPF Area ParametersParameter: OSPF AreaPath: Configuration Manager > Protocols > IP > OSPF/MO

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-50308627-14.20 Rev 00Parameter: Import AS ExternPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-51 Parameter: Import SummariesPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > Area

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-52308627-14.20 Rev 00Parameter: NSSA Originate Def RoutePath: Configuration Manager > Protocols

Site Manager Parameters308627-14.20 Rev 00A-53 Area Range ParametersParameter: NSSA Def Route TypePath: Configuration Manager > Protocols > IP &

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-54308627-14.20 Rev 00Parameter: Range MaskPath: Configuration Manager > Protocols > IP > O

Site Manager Parameters308627-14.20 Rev 00A-55 Parameter: StatusPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > Areas > Ran

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-56308627-14.20 Rev 00OSPF NSSA Range ParametersParameter: NSSA Range NetPath: Configuration Manager

Site Manager Parameters308627-14.20 Rev 00A-57 Parameter: EnablePath: Configuration Manager > Protocols > IP > OSPF/MOSPF > NSSA RangesDef

Configuring IP, ARP, RARP, RIP, and OSPF Services1-10308627-14.20 Rev 00Addresses and Variable-Length MasksA destination in a topology is expressed as

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-58308627-14.20 Rev 00Parameter: StatusPath: Configuration Manager > Protocols > IP > OSPF/

Site Manager Parameters308627-14.20 Rev 00A-59 OSPF Virtual Interface ParametersParameter: Transit Area IDPath: Configuration Manager > Protocols &

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-60308627-14.20 Rev 00Parameter: Transit DelayPath: Configuration Manager > Protocols > IP >

Site Manager Parameters308627-14.20 Rev 00A-61 Parameter: Hello IntervalPath: Configuration Manager > Protocols > IP > OSPF/MOSPF > Virtua

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-62308627-14.20 Rev 00RIP ParametersParameter: PasswordPath: Configuration Manager > Protocols &g

Site Manager Parameters308627-14.20 Rev 00A-63 Parameter: RIP ListenPath: Configuration Manager > Protocols > IP > RIP InterfacesDefault: Ena

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-64308627-14.20 Rev 00Parameter: Default Route ListenPath: Configuration Manager > Protocols >

Site Manager Parameters308627-14.20 Rev 00A-65 Parameter: Time to LivePath: Configuration Manager > Protocols > IP > RIP InterfacesDefault: 1

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-66308627-14.20 Rev 00Parameter: Holddown TimerPath: Configuration Manager > Protocols > IP &g

Site Manager Parameters308627-14.20 Rev 00A-67 Parameter: Triggered UpdatesPath: Configuration Manager > Protocols > IP > RIP InterfacesDefau

IP Concepts, Terminology, and Features308627-14.20 Rev 001-11 For example, in Figure 1-4, the router and host C are on the same physical network. Both

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-68308627-14.20 Rev 00Parameter: Initial Stabilization TimerPath: Configuration Manager > Protoco

Site Manager Parameters308627-14.20 Rev 00A-69 Accept and Announce Policy ParametersThis section contains the Site Manager parameter descriptions for

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-70308627-14.20 Rev 00Common Accept Policy ParametersParameter: EnablePath: Configuration Manager &g

Site Manager Parameters308627-14.20 Rev 00A-71 Parameter: NetworksPath: Configuration Manager > Protocols > IP > Policy Filters > RIP >

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-72308627-14.20 Rev 00Parameter: Route PreferencePath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-73 RIP Accept Policy ParametersParameter: From GatewayPath: Configuration Manager > Protocols > IP &

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-74308627-14.20 Rev 00Parameter: Apply Subnet MaskPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-75 OSPF Accept Policy ParametersParameter: TypePath: Configuration Manager > Protocols > IP > Pol

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-76308627-14.20 Rev 00Common Announce Policy ParametersParameter: EnablePath: Configuration Manager

Site Manager Parameters308627-14.20 Rev 00A-77 Parameter: NetworksPath: Configuration Manager > Protocols > IP > Policy Filters > RIP >

Configuring IP, ARP, RARP, RIP, and OSPF Services1-12308627-14.20 Rev 00In Figure 1-4, the router wants to send a packet to host C but knows only host

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-78308627-14.20 Rev 00Parameter: Rule PrecedencePath: Configuration Manager > Protocols > IP &

Site Manager Parameters308627-14.20 Rev 00A-79 Parameter: AdvertisePath: Configuration Manager > Protocols > IP > Policy Filters > RIP >

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-80308627-14.20 Rev 00Parameter: From RIP GatewayPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-81 Parameter: From OSPF Router IDPath: Configuration Manager > Protocols > IP > Policy Filters &g

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-82308627-14.20 Rev 00Parameter: Received OSPF TagPath: Configuration Manager > Protocols > IP

Site Manager Parameters308627-14.20 Rev 00A-83 Parameter: From EGP ASPath: Configuration Manager > Protocols > IP > Policy Filters > RIP &

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-84308627-14.20 Rev 00Parameter: From BGP PeerPath: Configuration Manager > Protocols > IP >

Site Manager Parameters308627-14.20 Rev 00A-85 Parameter: Received BGP Next HopPath: Configuration Manager > Protocols > IP > Policy Filters

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-86308627-14.20 Rev 00RIP Announce Policy ParametersParameter: External Route SourcePath: Configurat

Site Manager Parameters308627-14.20 Rev 00A-87 Parameter: RIP MetricPath: Configuration Manager > Protocols > IP > Policy Filters > RIP &g

IP Concepts, Terminology, and Features308627-14.20 Rev 001-13 Reverse Address Resolution Protocol (RARP)You can configure a Nortel Networks router as

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-88308627-14.20 Rev 00OSPF Announce Policy ParametersParameter: OSPF TypePath: Configuration Manager

Site Manager Parameters308627-14.20 Rev 00A-89 Parameter: BGP/OSPF Automatic TagPath: Configuration Manager > Protocols > IP > Policy Filters

Configuring IP, ARP, RARP, RIP, and OSPF ServicesA-90308627-14.20 Rev 00Parameter: OSPF NSSA PropagatePath: Configuration Manager > Protocols >

308627-14.20 Rev 00B-1 Appendix BImport and Export Route FiltersThis appendix contains RIP and OSPF import and export route filter parameters. You can

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-2308627-14.20 Rev 00RIP Import FiltersParameter: Import AddressPath: Configuration Manager > Pro

Import and Export Route Filters308627-14.20 Rev 00B-3 Parameter: RIP GatewayPath: Configuration Manager > Protocols > IP > Route Filters >

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-4308627-14.20 Rev 00Parameter: PreferencePath: Configuration Manager > Protocols > IP > Ro

Import and Export Route Filters308627-14.20 Rev 00B-5 RIP Export FiltersParameter: Import Apply MaskPath: Configuration Manager > Protocols > IP

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-6308627-14.20 Rev 00Parameter: Export MaskPath: Configuration Manager > Protocols > IP > R

Import and Export Route Filters308627-14.20 Rev 00B-7 Parameter: InterfacePath: Configuration Manager > Protocols > IP > Route Filters > R

Configuring IP, ARP, RARP, RIP, and OSPF Services1-14308627-14.20 Rev 00Routing Information Protocol (RIP)The Routing Information Protocol (RIP) is a

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-8308627-14.20 Rev 00OSPF Import FiltersParameter: RIP MetricPath: Configuration Manager > Protoc

Import and Export Route Filters308627-14.20 Rev 00B-9 Parameter: Import MaskPath: Configuration Manager > Protocols > IP > Route Filters >

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-10308627-14.20 Rev 00Parameter: Import TagPath: Configuration Manager > Protocols > IP > R

Import and Export Route Filters308627-14.20 Rev 00B-11 OSPF Export FiltersParameter: PreferencePath: Configuration Manager > Protocols > IP >

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-12308627-14.20 Rev 00Parameter: Export MaskPath: Configuration Manager > Protocols > IP >

Import and Export Route Filters308627-14.20 Rev 00B-13 Parameter: EnablePath: Configuration Manager > Protocols > IP > Route Filters > OSP

Configuring IP, ARP, RARP, RIP, and OSPF ServicesB-14308627-14.20 Rev 00Parameter: TagPath: Configuration Manager > Protocols > IP > Route Fi

308627-14.20 Rev 00C-1 Appendix CRoute Weight WorksheetThis appendix provides a worksheet that you can use to calculate route weights for OSPF, RIP, E

Configuring IP, ARP, RARP, RIP, and OSPF ServicesC-2308627-14.20 Rev 003. Select one route from the following list:4. Multiply the value associated wi

Route Weight Worksheet308627-14.20 Rev 00C-3 6.Multiply the value associated with the route by the following decimal or hexadecimal value:2097152 * __

IP Concepts, Terminology, and Features308627-14.20 Rev 001-15 OSPF NeighborsOSPF neighbors are any two routers that have an interface to the same netw

Configuring IP, ARP, RARP, RIP, and OSPF ServicesC-4308627-14.20 Rev 008. Add the values that you calculated._________________________________________

308627-14.20 Rev 00D-1 Appendix DIP/OSPF Configuration ExampleThe IP/OSPF configuration in Figure D-1 shows an AS divided into different types of OSPF

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-2308627-14.20 Rev 00Figure D-1. IP/OSPF ConfigurationFDDIF31.4F31.2F31.3.5 F31.1 F31E21128.10.2.6

IP/OSPF Configuration Example308627-14.20 Rev 00D-3 Configuring Internal Backbone Router 1This section provides instructions for configuring internal

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-4308627-14.20 Rev 00Configuring Area Border Router 2This section provides instructions for configur

IP/OSPF Configuration Example308627-14.20 Rev 00D-5 Using the BCCFollowing are the BCC commands that you use to configure area border router 2.box# fd

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-6308627-14.20 Rev 00Configuring Area Border Router 3This section provides instructions for configur

IP/OSPF Configuration Example308627-14.20 Rev 00D-7 Using the BCCFollowing are the BCC commands that you use to configure area border router 3.box# fd

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-8308627-14.20 Rev 00Configuring Area Border Router 4This section provides instructions for configur

IP/OSPF Configuration Example308627-14.20 Rev 00D-9 Using the BCCFollowing are the BCC commands that you use to configure area border router 4.box# fd

Configuring IP, ARP, RARP, RIP, and OSPF Services1-16308627-14.20 Rev 00Designated RoutersTo further reduce the amount of routing traffic, the Hello p

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-10308627-14.20 Rev 00Configuring Internal Backbone Router 5This section provides instructions for c

IP/OSPF Configuration Example308627-14.20 Rev 00D-11 Configuring AS Boundary Router 6This section provides instructions for configuring AS boundary ro

Configuring IP, ARP, RARP, RIP, and OSPF ServicesD-12308627-14.20 Rev 00Using the BCCFollowing are the BCC commands that you use to configure AS bound

308627-14.20 Rev 00Index-1Aaccept policiesOSPF, 6-64overview, 1-23RIP, 5-25setting maximum number, 3-13acronyms, xixactual cost, RIP, 5-9Addr Mask Rep

Index-2308627-14.20 Rev 00AS Boundary Router parameter, 6-7, A-38ASB parameter, 3-35, A-7as-boundary-router command, 6-7as-default-tag command, 6-13AS

308627-14.20 Rev 00Index-3default-supply command, 5-15deletingIP from an interface, 3-46, 3-47OSPF from an interface, 6-41RARP services, 4-16RIP from

Index-4308627-14.20 Rev 00FR/ATM SVC Broadcast parameter, 5-24, A-68frame relay network, WAN address for, 3-43FRB Broad Cast parameter, A-14FRM Broadc

308627-14.20 Rev 00Index-5MMAC Address parameteradjacent host, A-31IP interface, 3-38, A-10RARP, 4-15, A-35MAC address, for IP interface, 3-37Mask par

Index-6308627-14.20 Rev 00OSPF (continued)router priority, specifying, 6-24slot for soloist, 6-5starting, 2-8, 2-9, 2-10summary route, 6-47transit del

308627-14.20 Rev 00Index-7RIP (continued)timeout, 5-20TTL (time-to-live), specifying, 5-12updatesreceiving, 5-14supplying, 5-8version, 5-4RIP Diameter

IP Concepts, Terminology, and Features308627-14.20 Rev 001-17 OSPF AreasOSPF routers reduce and restrict the amount of internal and external link stat

Index-8308627-14.20 Rev 00synchronous/PPP link, 6-36TTag Generation Method parameter, 6-13, A-40technical publications, xxitechnical support, xxiitext

iv308627-14.20 Rev 00for the security of its own data and information and for maintaining adequate procedures apart from the Software to reconstruct

Configuring IP, ARP, RARP, RIP, and OSPF Services1-18308627-14.20 Rev 00Each area has a unique ID number. (ID 0.0.0.0 is always reserved for the OSPF

IP Concepts, Terminology, and Features308627-14.20 Rev 001-19 OSPF Router TypesOSPF defines the following router types: • Internal router. A router wi

Configuring IP, ARP, RARP, RIP, and OSPF Services1-20308627-14.20 Rev 00• OSPF considers the cost of a path, not the hop count, when choosing the best

IP Concepts, Terminology, and Features308627-14.20 Rev 001-21 Route PreferencesThe IP router maintains an internal routing table. When determining how

Configuring IP, ARP, RARP, RIP, and OSPF Services1-22308627-14.20 Rev 00Route WeightsRoute weight calculation is an internal tool that IP uses to faci

IP Concepts, Terminology, and Features308627-14.20 Rev 001-23 IP Routing Policies and FiltersThe IP router allows you to control the flow of routing d

Configuring IP, ARP, RARP, RIP, and OSPF Services1-24308627-14.20 Rev 00Figure 1-7. IP Routing TableOSPFRIP BGP-3 BGP-4 EGPRoutingtablemanagerIP netwo

IP Concepts, Terminology, and Features308627-14.20 Rev 001-25 The flow of routing information between the network, the protocols, and the routing tabl

Configuring IP, ARP, RARP, RIP, and OSPF Services1-26308627-14.20 Rev 00Figure 1-8. Accept and Announce PoliciesAcceptpolicyAnnouncepolicyRoutingtable

IP Concepts, Terminology, and Features308627-14.20 Rev 001-27 The routing protocol announces routes to other routers in the network as follows:1.The r

308627-14.20 Rev 00vContents PrefaceBefore You Begin ...

Configuring IP, ARP, RARP, RIP, and OSPF Services1-28308627-14.20 Rev 00IP Traffic FiltersA traffic filter enables the router to selectively relay or

308627-14.20 Rev 002-1 Chapter 2Starting IP ServicesThis chapter describes how to use the BCC and Site Manager to create a basic configuration — that

Configuring IP, ARP, RARP, RIP, and OSPF Services2-2308627-14.20 Rev 00Using the BCCYou can use the BCC to start IP, RIP, OSPF, and Router Discovery.

Starting IP Services308627-14.20 Rev 002-3 Step 2: Configuring an IP InterfaceTo configure an IP interface on a physical interface, go to the prompt f

Configuring IP, ARP, RARP, RIP, and OSPF Services2-4308627-14.20 Rev 00Starting OSPFYou start OSPF on the router by adding OSPF to an existing IP inte

Starting IP Services308627-14.20 Rev 002-5 Using Site ManagerYou can use Site Manager to start IP, RIP, OSPF, RARP, and Router Discovery. The followin

Configuring IP, ARP, RARP, RIP, and OSPF Services2-6308627-14.20 Rev 00An IP interface is now configured with default values for all interface paramet

Starting IP Services308627-14.20 Rev 002-7 Adding RIP to an IP InterfaceTo add RIP to an existing IP interface, complete the following tasks:Site Mana

Configuring IP, ARP, RARP, RIP, and OSPF Services2-8308627-14.20 Rev 00Starting OSPFBefore you can select a protocol to run on the router, you must co

Starting IP Services308627-14.20 Rev 002-9 OSPF is now running on the router and on the interface with default values for all parameters. You customiz

vi308627-14.20 Rev 00Route Preferences ...1-21Ro

Configuring IP, ARP, RARP, RIP, and OSPF Services2-10308627-14.20 Rev 00Starting Router DiscoveryBefore you can select a protocol to run on the router

308627-14.20 Rev 003-1 Chapter 3Configuring and Customizing IPYou customize IP services by setting parameters as described under the following topics:

Configuring IP, ARP, RARP, RIP, and OSPF Services3-2308627-14.20 Rev 00Customizing IP Global ParametersWhen you configure an IP interface on a slot, I

Configuring and Customizing IP308627-14.20 Rev 003-3 Disabling and Reenabling Global IPIP is enabled on the slot by default. You can disable and reena

Configuring IP, ARP, RARP, RIP, and OSPF Services3-4308627-14.20 Rev 00Configuring the Router for Not-Forwarding ModeBy default, IP forwards all packe

Configuring and Customizing IP308627-14.20 Rev 003-5 Using Site ManagerTo specify the forwarding mode, complete the following tasks:Specifying Whether

Configuring IP, ARP, RARP, RIP, and OSPF Services3-6308627-14.20 Rev 00Configuring Bridging on a Router in Not-Forwarding ModeBecause the IP router do

Configuring and Customizing IP308627-14.20 Rev 003-7 ES > To k e n > Nortel > FDDI > Nortel Not supportedES > Token >

Configuring IP, ARP, RARP, RIP, and OSPF Services3-8308627-14.20 Rev 00Nortel > SMDS*** > Nortel SupportedNortel > PPP††† > Nortel Not sup

Configuring and Customizing IP308627-14.20 Rev 003-9 Setting the Time-to-Live Value on a Source PacketEach IP data packet includes a time-to-live (TTL

308627-14.20 Rev 00viiSetting the ICMP Error Limit ...3-15Disabling an

Configuring IP, ARP, RARP, RIP, and OSPF Services3-10308627-14.20 Rev 00Allowing an All-Zero or All-One Subnet AddressBy default, you cannot configure

Configuring and Customizing IP308627-14.20 Rev 003-11 Using Site ManagerTo allow all-zero and all-one subnet addresses, complete the following tasks:E

Configuring IP, ARP, RARP, RIP, and OSPF Services3-12308627-14.20 Rev 00To preallocate memory for the routing tables, complete the following tasks:Usi

Configuring and Customizing IP308627-14.20 Rev 003-13 To allow the IP router to use a default route for unknown subnets, complete the following tasks:

Configuring IP, ARP, RARP, RIP, and OSPF Services3-14308627-14.20 Rev 00Using Site ManagerTo set the maximum number of policies, complete the followin

Configuring and Customizing IP308627-14.20 Rev 003-15 Setting the ICMP Error LimitYou can specify the maximum number of ICMP messages to transmit with

Configuring IP, ARP, RARP, RIP, and OSPF Services3-16308627-14.20 Rev 00Using Site ManagerTo disable or reenable support for route filters, complete t

Configuring and Customizing IP308627-14.20 Rev 003-17 When enabled, ECMP works as follows:• If the current best routes to the destination are better t

Configuring IP, ARP, RARP, RIP, and OSPF Services3-18308627-14.20 Rev 00To specify the maximum number of equal-cost paths for OSPF, go to the global I

Configuring and Customizing IP308627-14.20 Rev 003-19 Enabling ISP Mode on the RouterIP provides an Internet service provider (ISP) mode of operation.

viii308627-14.20 Rev 00Specifying the Time Interval Between Advertisements ...3-65Configuring the Lifetime of

Configuring IP, ARP, RARP, RIP, and OSPF Services3-20308627-14.20 Rev 00Using the BCCTo enable or disable ISP mode, go to the global IP prompt (for ex

Configuring and Customizing IP308627-14.20 Rev 003-21 Customizing the IP Routing Table StructureStructurally, the IP routing table consists of indexes

Configuring IP, ARP, RARP, RIP, and OSPF Services3-22308627-14.20 Rev 00Specifying the Percentage of Buffers Available to ARPBy default, ARP can use 1

Configuring and Customizing IP308627-14.20 Rev 003-23 Enabling Directed Broadcast on a RouterA directed broadcast is a broadcast sent to an entire net

Configuring IP, ARP, RARP, RIP, and OSPF Services3-24308627-14.20 Rev 00Customizing an IP InterfaceAn IP network interface is a physical circuit confi

Configuring and Customizing IP308627-14.20 Rev 003-25 When you configure an IP interface on a circuit, the interface is enabled with default values fo

Configuring IP, ARP, RARP, RIP, and OSPF Services3-26308627-14.20 Rev 00Disabling and Reenabling an IP InterfaceWhen you configure an IP interface on

Configuring and Customizing IP308627-14.20 Rev 003-27 Specifying a Broadcast Address for an InterfaceIn broadcasting, the IP router transmits a single

Configuring IP, ARP, RARP, RIP, and OSPF Services3-28308627-14.20 Rev 00For example, the following command assigns broadcast address 2.2.0.0 to IP int

Configuring and Customizing IP308627-14.20 Rev 003-29 Using the BCCTo specify the cost of an IP interface, go to an IP interface prompt (for example,

308627-14.20 Rev 00ixSpecifying the Full Update Interval ...5-18Specifying a Timeout Pe

Configuring IP, ARP, RARP, RIP, and OSPF Services3-30308627-14.20 Rev 00Enabling MTU Discovery on an InterfaceAn MTU probe is a request for the maximu

Configuring and Customizing IP308627-14.20 Rev 003-31 Using Site ManagerTo enable or disable MTU discovery on an interface, complete the following tas

Configuring IP, ARP, RARP, RIP, and OSPF Services3-32308627-14.20 Rev 00Using the BCCTo enable or disable ICMP address-mask reply messages, go to an I

Configuring and Customizing IP308627-14.20 Rev 003-33 Disabling and Reenabling ICMP Redirect MessagesAn ICMP redirect is a message sent by the router

Configuring IP, ARP, RARP, RIP, and OSPF Services3-34308627-14.20 Rev 00Using Site ManagerTo disable or reenable ICMP redirect messages, complete the

Configuring and Customizing IP308627-14.20 Rev 003-35 Using the BCCTo enable or disable all-subnet broadcasting, go to an IP interface prompt (for exa

Configuring IP, ARP, RARP, RIP, and OSPF Services3-36308627-14.20 Rev 00Disabling UDP Checksum Processing on an InterfaceBy default, all outgoing and

Configuring and Customizing IP308627-14.20 Rev 003-37 Specifying a MAC AddressYou can use Site Manager or the BCC to specify a media access control (M

Configuring IP, ARP, RARP, RIP, and OSPF Services3-38308627-14.20 Rev 00For example, the following command directs the router to use its own IP addres

Configuring and Customizing IP308627-14.20 Rev 003-39 With end-station support enabled, an IP router does the following (Figure 3-2):1. Receives a pac