Command Line Reference Guide

Intermediate System to Intermediate System (IS-

IS)

The intermediate system to intermediate system (IS-IS) protocol for IPv4 and IPv6 is supported on the S5000 switch.

IS-IS is an interior gateway protocol that uses a shortest-path-first algorithm. IS-IS facilitates the communication

between open systems, supporting routers passing both IP and OSI traffic.

A router is considered an intermediate system. Networks are partitioned into manageable routing domains, called areas.

Intermediate systems send, receive, and forward packets to other routers within their area (Level 1 and Level 1-2

devices). Only Level 1-2 and Level 2 devices communicate with other areas.

IS-IS protocol standards are listed in the Standard Compliance chapter in the

FTOS Configuration Guide

NOTE: The fundamental mechanisms of IS-IS are the same between IPv4 and IPv6. Where there are differences

between the two versions, they are identified and clarified in this chapter. Except where identified, the information

in this chapter applies to both protocol versions.

adjacency-check

Verify that the “protocols supported” field of the IS-IS neighbor contains matching values to this router.

S5000

Syntax

adjacency-check

To disable adjacency check, use the no adjacency-check command.

Defaults Enabled.

Command Modes

• ROUTER ISIS (

for IPv4

)

• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (

for IPv6

)

Command History

Version 9.0(1.3) Introduced on the S5000.

Usage

Information

Use this command to perform protocol-support consistency checks on hello packets. The

adjacency-check is enabled by default.

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