R21xx-HP FlexFabric 11900 Layer 3 IP Routing Configuration Guide
iv
Configuring bidirectional control detection ········································································································ 80
Configuring single-hop echo detection ··············································································································· 81
Configuring OSPF FRR ··················································································································································· 81
Configuration prerequisites ·································································································································· 82
Configuration guidelines ······································································································································ 82
Configuring OSPF FRR to calculate a backup next hop using the LFA algorithm ·········································· 82
Configuring OSPF FRR to specify a backup next hop using a routing policy ················································· 82
Displaying and maintaining OSPF ······························································································································· 83
OSPF configuration examples ······································································································································ 84
Configuring basic OSPF ······································································································································· 84
Configuring OSPF route redistribution ················································································································ 87
Configuring OSPF to advertise a summary route ······························································································· 88
Configuring an OSPF stub area··························································································································· 92
Configuring an OSPF NSSA area ······················································································································· 94
Configuring OSPF DR election ····························································································································· 96
Configuring OSPF virtual links ··························································································································· 101
Configuring OSPF GR ········································································································································· 103
Configuring BFD for OSPF ································································································································· 105
Configuring OSPF FRR ········································································································································ 108
Troubleshooting OSPF configuration ························································································································· 110
No OSPF neighbor relationship established ···································································································· 110
Incorrect routing information ······························································································································ 111
Configuring IS-IS ····················································································································································· 112
Overview ······································································································································································· 112
Terminology ························································································································································· 112
IS-IS address format ············································································································································· 113
NET ······································································································································································· 114
IS-IS area ······························································································································································ 114
IS-IS network types ·············································································································································· 116
IS-IS PDUs ····························································································································································· 118
Protocols and standards ····································································································································· 119
IS-IS configuration task list ··········································································································································· 120
Configuring basic IS-IS ················································································································································ 121
Configuration prerequisites ································································································································ 121
Enabling IS-IS ······················································································································································· 121
Configuring the IS level and circuit level ·········································································································· 121
Configuring P2P network type for an interface ································································································ 122
Configuring IS-IS route control ···································································································································· 123
Configuration prerequisites ································································································································ 123
Configuring IS-IS link cost ··································································································································· 123
Specifying a preference for IS-IS ······················································································································· 124
Configuring the maximum number of ECMP routes ························································································ 125
Configuring IS-IS route summarization ·············································································································· 125