Users Guide

Intermediate System to Intermediate

System (IS-IS)

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

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

A router is considered as 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 Dell Networking OS

Configuration Guide.

NOTE

: The fundamental mechanisms of IS-IS are the same for IPv4 and IPv6. However some command

modes might vary when applied to IPV4 and IPV6. These variations have been explicitly explained for such

commands. If the variation is not mentioned, then the information applies to both the protocol versions.

Topics:

• adjacency-check

• advertise

• area-password

• clear config

• clear isis

• clns host

• debug isis

• debug isis adj-packets

• debug isis local-updates

• debug isis snp-packets

• debug isis spf-triggers

• debug isis update-packets

• default-information originate

• description

• distance

• distribute-list in

• distribute-list out

• distribute-list redistributed-override

• domain-password

• graceful-restart ietf

• graceful-restart interval

Intermediate System to Intermediate System (IS-IS) 1100