
Using Technician Interface Software
A-8 114088 Rev. A
Also, the latest editions of the following textbooks provide information about
these standards:
• Comer, Douglas E. Internetworking with TCP/IP, Vol. 1. Englewood Cliffs,
New Jersey: Prentice-Hall.
• Rose, Marshall T. The Simple Book. Englewood Cliffs, New Jersey: Prentice-
Hall.
• Stevens, Richard W. TCP/IP Illustrated, Vol. 1. Reading, Massachusetts:
Addison-Wesley.
Implementation Notes
The following notes list the assumptions made about MIB-II object definitions,
supported traps, unsupported objects, and unsupported operations.
MIB-II Object Definitions
The assumptions about MIB-II object definitions are as follows:
ifNumber Represents the total number of rows in the interface table.
ifIndex Represents a unique integer corresponding to a data-link layer
entity. ifIndex values are derived from Bay Networks circuit
numbers. A single interface or a group of interfaces (multiline)
can be a member of a single circuit. With a single interface, a
single ifIndex value matching the circuit number is allocated
and the ifTable statistics correspond to the single interface. With
a group of interfaces, a single ifIndex value is still allocated;
however the ifTable statistics are aggregated for all interfaces in
the circuit group.
Four statistics require special consideration when using
multiline: ifAdminStatus, ifOperStatus, ifMTU, and
ifPhysAddress. ifAdminStatus and ifOperStatus return UP if at
least one interface is up. All interfaces must be down before
DOWN is returned. The ifMTU value returned is the minimum
MTU for the circuit group and the ifPhysAddress is the physical
address of the first interface in the circuit to initialize.
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