iv
Basic OSPF configuration example ··················································································································· 102
OSPF route redistribution configuration example ···························································································· 105
OSPF route summarization configuration example ························································································· 106
OSPF stub area configuration example ············································································································ 109
OSPF NSSA area configuration example ········································································································ 112
OSPF DR election configuration example ········································································································· 114
OSPF virtual link configuration example ··········································································································· 118
OSPF GR configuration example ······················································································································· 120
OSPF NSR configuration example ···················································································································· 122
BFD for OSPF configuration example ··············································································································· 124
OSPF FRR configuration example ······················································································································ 127
Troubleshooting OSPF configuration ························································································································· 130
No OSPF neighbor relationship established ···································································································· 130
Incorrect routing information ······························································································································ 130
Configuring IS-IS ····················································································································································· 132
Overview ······································································································································································· 132
Terminology ························································································································································· 132
IS-IS address format ············································································································································· 132
NET ······································································································································································· 133
IS-IS area ······························································································································································ 134
IS-IS network types ·············································································································································· 136
IS-IS PDUs ····························································································································································· 137
Protocols and standards ····································································································································· 138
IS-IS configuration task list ··········································································································································· 139
Configuring basic IS-IS ················································································································································ 140
Configuration prerequisites ································································································································ 140
Enabling IS-IS ······················································································································································· 140
Configuring the IS level and circuit level ·········································································································· 141
Configuring P2P network type for an interface ································································································ 141
Configuring IS-IS route control ···································································································································· 142
Configuration prerequisites ································································································································ 142
Configuring IS-IS link cost ··································································································································· 142
Specifying a preference for IS-IS ······················································································································· 143
Configuring the maximum number of ECMP routes ························································································ 144
Configuring IS-IS route summarization ·············································································································· 144
Advertising a default route ································································································································· 145
Configuring IS-IS route redistribution ················································································································ 145
Configuring IS-IS route filtering ·························································································································· 146
Configuring IS-IS route leaking ·························································································································· 146
Tuning and optimizing IS-IS networks ························································································································ 147
Configuration prerequisites ································································································································ 147
Specifying the interval for sending IS-IS hello packets ···················································································· 147
Specifying the IS-IS hello multiplier ···················································································································· 147
Specifying the interval for sending IS-IS CSNP packets ·················································································· 148
Configuring a DIS priority for an interface ······································································································· 148
Enabling source address check for hello packets on a PPP interface ···························································· 149
Disabling an interface from sending/receiving IS-IS packets ········································································· 149
Enabling an interface to send small hello packets ··························································································· 149
Configuring LSP parameters ······························································································································· 150
Controlling SPF calculation interval ··················································································································· 152
Configuring convergence priorities for specific routes ···················································································· 153
Setting the LSDB overload bit ····························································································································· 153
Configuring system ID to host name mappings ································································································ 154
Enabling the logging of neighbor state changes ····························································································· 155
