3Com S7906E - Switch, Configuration Manual

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Table of Contents
1 IS-IS Configuration ····································································································································1-1
IS-IS Overview ········································································································································1-1
Basic Concepts································································································································1-1
IS-IS Area ········································································································································1-3
IS-IS Network Type ·························································································································1-5
IS-IS PDU Format····························································································································1-7
Supported IS-IS Features··············································································································1-13
Protocols and Standards ···············································································································1-16
IS-IS Configuration Task List ················································································································1-16
Configuring IS-IS Basic Functions ········································································································1-17
Configuration Prerequisites ···········································································································1-17
Enabling IS-IS································································································································1-17
Configuring the IS Level and Circuit Level ····················································································1-17
Configuring the Network Type of an Interface as P2P ··································································1-18
Configuring IS-IS Routing Information Control ·····················································································1-19
Configuration Prerequisites ···········································································································1-19
Configuring IS-IS Link Cost ···········································································································1-19
Specifying a Priority for IS-IS ········································································································1-20
Configuring the Maximum Number of Equal Cost Routes ····························································1-21
Configuring IS-IS Route Summarization ·······················································································1-21
Advertising a Default Route···········································································································1-22
Configuring IS-IS Route Redistribution ·························································································1-22
Configuring IS-IS Route Filtering···································································································1-23
Configuring IS-IS Route Leaking···································································································1-24
Tuning and Optimizing IS-IS Networks ·································································································1-24
Configuration Prerequisites ···········································································································1-24
Specifying Intervals for Sending IS-IS Hello and CSNP Packets··················································1-24
Specifying the IS-IS Hello Multiplier ······························································································1-25
Configuring a DIS Priority for an Interface·····················································································1-25
Disabling an Interface from Sending/Receiving IS-IS Packets ·····················································1-26
Enabling an Interface to Send Small Hello Packets······································································1-26
Configuring LSP Parameters·········································································································1-26
Configuring SPF Parameters ········································································································1-30
Setting the LSDB Overload Bit ······································································································1-30
Configuring IS-IS Authentication···········································································································1-31
Configuration Prerequisites ···········································································································1-31
Configuring Neighbor Relationship Authentication········································································1-31
Configuring Area Authentication····································································································1-31
Configuring Routing Domain Authentication ·················································································1-32
Configuring System ID to Host Name Mappings ··················································································1-32
Configuring a Static System ID to Host Name Mapping ·······························································1-32
Configuring Dynamic System ID to Host Name Mapping ·····························································1-33
Configuring IS-IS GR ····························································································································1-33