CLI Guide

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Intermediate System to Intermediate
System (IS-IS)
The Dell Networking OS supports the intermediate system to intermediate system (IS-IS) protocol for
IPv4 and IPv6.
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 Dell Networking OS
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.
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)
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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Intermediate System to Intermediate System (IS-IS)