Intermediate System To Intermediate System (Is-Is) - Dell C9000 Series Reference Manual

Intermediate System to Intermediate
The intermediate system to intermediate system (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.
Topics:
• adjacency-check
• advertise
• area-password
• clear isis
• clns host
• debug isis
• debug isis adj-packets
• debug isis graceful-restart
• 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
System (IS-IS)

Intermediate System to Intermediate System (IS-IS)

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