Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Manuel d'utilisateur Page 84

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Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services
3-6 114070 Rev. A
You configure this type of filter by setting the Pass Through Mode parameter. This
parameter appears in several windows you use to configure BOOTP services. The
default setting is BOOTP and allows the interface to transmit only BOOTP
packets. Be sure to change the setting if you want to transmit DHCP messages.
Improving the Efficiency of Packet Relay
You can improve the efficiency of the BOOTP packet relay process by
Specifying the addresses of BOOTP servers
Using traffic filters
Specifying BOOTP Servers
You specify a BOOTP server by assigning a particular BOOTP server to an output
interface in the BOOTP Relay Agent Preferred Server Table window (see
F
igure 3-10). For instructions about this procedure, refer to “Specifying Servers
for BOOTP Services,” later in this chapter.
In the BOOT Relay Agent Preferred Server Table window (refer to F
igure 3-10),
you enter the IP address of the relay agent on the router and the IP address of the
target server. The router can then unicast a BOOTREQUEST packet through
normal IP services to that server.
Using Traffic Filters
For instructions on configuring traffic filters (not supported by BNX software),
refer to Configuring Traffic Filters and Protocol Prioritization. The following
example illustrates how you can use a traffic filter to enhance BOOTP operation.
Example
Consider a network segment that has two types of clients: one set that should boot
using only servers on the local network and another set that should boot from
remote servers. You could set up a traffic filter to drop any BOOTREQUEST
packets from the first set, as follows:
Protocol: User Datagram Protocol (UDP)
UDP destination port: BOOTP server
User-defined field for the client hardware address in the BOOTP header: all
MAC addresses of clients in the local group
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