Operation Manual – IPv4 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 4 IS-IS Configuration
4-1
Chapter 4 IS-IS Configuration
When configuring IS-IS, go to these sections for information you are interested in:
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Configuring IS-IS Basic Functions
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Configuring IS-IS Routing Information Control
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Tuning and Optimizing IS-IS Network
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Displaying and Maintaining IS-IS
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Note:
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The term “router” in this document refers to a router in a generic sense or an
Ethernet switch running routing protocols.
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The value ranges of the parameters of the commands in this manual use the ranges
assuming the switch operate in the default mode. When the switch operates in the
IPv4/IPv6 dual-stack or the MCE mode, the value ranges of some parameters may
vary. For the operating modes of the switch, refer to the parts discussing
IPv6
configuration
or
MCE
4.1 IS-IS Overview
Intermediate System-to-Intermediate System (IS-IS) is a dynamic routing protocol
designed by the International Organization for Standardization (ISO) to operate on the
connectionless network protocol (CLNP).
The IS-IS routing protocol has been modified and extended in RFC 1195 by the
International Engineer Task Force (IETF) for application in both TCP/IP and OSI
reference models, and the new one is called Integrated IS-IS or Dual IS-IS.
IS-IS is an interior gateway protocol (IGP) used within an Autonomous System. It
adopts the Shortest Path First (SPF) algorithm for route calculation.