Configuring stub routers ··························································································································· 77
Enabling message logging ······················································································································· 80
Enabling OSPF ISPF ······························································································································· 81
Configuring OSPF FRR ··································································································································· 82
Configuring OSPF GR ····································································································································· 83
Triggering OSPF GR ································································································································ 85
Configuring OSPF NSR ··································································································································· 85
Configuring BFD for OSPF ······························································································································ 86
OSPF configuration examples ························································································································· 88
Configuring OSPF DR election ·············································································································· 100
Configuring OSPF GR ···························································································································· 105
Configuring OSPF NSR ························································································································· 108
Configuring route filtering ······················································································································· 109
Configuring OSPF FRR ·························································································································· 112
Configuring BFD for OSPF ····················································································································· 114
Incorrect routing information ·················································································································· 118
Configuring IS-IS ························································································· 119
Overview ························································································································································ 119
Terminology ··········································································································································· 119
IS-IS address format ······························································································································ 119
NET ························································································································································ 120
IS-IS area ··············································································································································· 121
IS-IS network types ································································································································ 122
IS-IS PDUs ············································································································································· 123
Supported IS-IS features ························································································································ 129
Protocols and standards ························································································································ 131
IS-IS configuration task list ···························································································································· 132
Configuration prerequisites ···················································································································· 133
Enabling IS-IS ········································································································································ 133
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