iii
Configuring a virtual link ······································································································································ 74
Configuring OSPF network types ································································································································· 75
Configuration prerequisites ·································································································································· 75
Configuring the broadcast network type for an interface ················································································· 76
Configuring the NBMA network type for an interface ······················································································ 76
Configuring the P2MP network type for an interface ························································································ 77
Configuring the P2P network type for an interface ··························································································· 77
Configuring OSPF route control ··································································································································· 78
Configuration prerequisites ·································································································································· 78
Configuring OSPF route summarization ············································································································· 78
Configuring received OSPF route filtering ·········································································································· 79
Configuring Type-3 LSA filtering ·························································································································· 80
Configuring an OSPF cost for an interface ········································································································ 80
Configuring the maximum number of ECMP routes ·························································································· 81
Configuring OSPF preference ······························································································································ 82
Configuring OSPF route redistribution ················································································································ 82
Advertising a host route ········································································································································ 83
Tuning and optimizing OSPF networks ························································································································ 84
Configuration prerequisites ·································································································································· 84
Configuring OSPF timers ······································································································································ 84
Specifying LSA transmission delay ······················································································································ 85
Specifying SPF calculation interval ······················································································································ 85
Specifying the LSA arrival interval ······················································································································· 86
Specifying the LSA generation interval ··············································································································· 86
Disabling interfaces from receiving and sending OSPF packets ······································································ 87
Configuring stub routers ······································································································································· 87
Configuring OSPF authentication ························································································································ 88
Adding the interface MTU into DD packets ········································································································ 89
Configuring a DSCP value for OSPF packets ····································································································· 89
Configuring the maximum number of external LSAs in LSDB ··········································································· 89
Configuring OSPF exit overflow interval ············································································································· 90
Enabling compatibility with RFC 1583 ··············································································································· 90
Logging neighbor state changes ·························································································································· 91
Configuring OSPF network management ··········································································································· 91
Configuring the LSU transmit rate ························································································································ 92
Enabling OSPF ISPF ·············································································································································· 92
Configuring prefix suppression ···························································································································· 93
Configuring prefix prioritization ·························································································································· 94
Configuring OSPF PIC ·········································································································································· 94
Configuring the number of OSPF logs ················································································································ 95
Configuring OSPF GR ··················································································································································· 95
Configuring OSPF GR restarter ···························································································································· 95
Configuring OSPF GR helper ······························································································································· 96
Triggering OSPF GR ············································································································································· 97
Configuring OSPF NSR ················································································································································· 97
Configuring BFD for OSPF ············································································································································ 98
Configuring bidirectional control detection ········································································································ 98
Configuring single-hop echo detection ··············································································································· 98
Configuring OSPF FRR ··················································································································································· 99
Configuration prerequisites ·································································································································· 99
Configuration guidelines ······································································································································ 99
Configuration procedure ······································································································································ 99
Displaying and maintaining OSPF ····························································································································· 101
OSPF configuration examples ···································································································································· 102
