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No OSPF neighbor relationship established ···································································································· 130
Incorrect routing information ······························································································································ 131
Configuring IS-IS ····················································································································································· 132
Overview ······································································································································································· 132
Terminology ························································································································································· 132
IS-IS address format ············································································································································· 132
NET ······································································································································································· 133
IS-IS area ······························································································································································ 134
IS-IS network type ················································································································································ 136
IS-IS PDU ······························································································································································· 137
Supported IS-IS features ······································································································································ 143
Protocols and standards ····································································································································· 145
IS-IS configuration task list ··········································································································································· 146
Configuring basic IS-IS ················································································································································ 147
Configuration prerequisites ································································································································ 147
Enabling IS-IS ······················································································································································· 147
Configuring the IS level and circuit level ·········································································································· 147
Configuring the network type of an interface as P2P ······················································································ 148
Configuring IS-IS routing information control ············································································································ 148
Configuration prerequisites ································································································································ 148
Configuring IS-IS link cost ··································································································································· 149
Specifying a priority for IS-IS ····························································································································· 150
Configuring the maximum number of ECMP routes ························································································ 150
Configuring IS-IS route summarization ·············································································································· 151
Advertising a default route ································································································································· 151
Configuring IS-IS route redistribution ················································································································ 152
Configuring IS-IS route filtering ·························································································································· 152
Configuring IS-IS route leaking ·························································································································· 153
Tuning and optimizing IS-IS networks ························································································································ 153
Configuration prerequisites ································································································································ 153
Specifying intervals for sending IS-IS hello and CSNP packets ····································································· 154
Specifying the IS-IS hello multiplier ···················································································································· 154
Configuring a DIS priority for an interface ······································································································· 154
Disabling an interface from sending/receiving IS-IS packets ········································································· 155
Enabling an interface to send small hello packets ··························································································· 155
Configuring LSP parameters ······························································································································· 155
Configuring SPF parameters ······························································································································ 158
Assigning a high priority to IS-IS routes ············································································································ 159
Setting the LSDB overload bit ····························································································································· 159
Configuring system ID to host name mappings ································································································ 160
Enabling the logging of neighbor state changes ····························································································· 161
Enhancing IS-IS network security ································································································································ 161
Configuration prerequisites ································································································································ 161
Configuring neighbor relationship authentication ··························································································· 161
Configuring area authentication ························································································································ 162
Configuring routing domain authentication ······································································································ 162
Configuring IS-IS GR ···················································································································································· 163
Configuring IS-IS NSR ·················································································································································· 164
Configuring IS-IS FRR ··················································································································································· 164
Enabling IS-IS SNMP trap ··········································································································································· 166
Binding an IS-IS process with MIBs ···························································································································· 166
Configuring BFD for IS-IS············································································································································· 166
Displaying and maintaining IS-IS ······························································································································· 166
IS-IS configuration examples ······································································································································· 167
