Reference Guide

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Intermediate System to Intermediate System

Intermediate System to Intermediate System is supported on platforms e z

IS-IS is supported on the E-Series ExaScale platform with FTOS 8.1.1.0 and later. It is supported on the

with FTOS 8.3.10.0 and on Z9000 with FTOS 9.0.0.0.

Intermediate System to Intermediate System (IS-IS) protocol is an interior gateway protocol (IGP) that

uses a shortest-path-first algorithm. Dell Force10 supports both IPv4 and IPv6 versions of IS-IS, as it is

detailed in this chapter.

• Protocol Overview on page 483

• IS-IS Addressing on page 484

• Multi-Topology IS-IS on page 485

• Graceful Restart on page 486

• Implementation Information on page 487

• Configuration Information on page 488

• IS-IS Metric Styles on page 507

• Sample Configuration on page 511

IS-IS protocol standards are listed in the Chapter 51, Standards Compliance chapter.

Protocol Overview

The intermediate-system-to-intermediate-system (IS-IS) protocol, developed by the International

Organization for Standardization (ISO), is an interior gateway protocol (IGP) that uses a shortest-path-first

algorithm.

Note: This protocol supports routers passing both IP and OSI traffic, though the Dell Force10

implementation supports only IP traffic.