iii
Configuring a stub area ······································································································ 76
Configuring an NSSA area ·································································································· 76
Configuring a virtual link ······································································································ 77
Configuring OSPF network types ································································································· 77
Configuration prerequisites ·································································································· 78
Configuring the broadcast network type for an interface ····························································· 78
Configuring the NBMA network type for an interface ································································· 78
Configuring the P2MP network type for an interface ·································································· 79
Configuring the P2P network type for an interface ···································································· 79
Configuring OSPF route control ·································································································· 80
Configuration prerequisites ·································································································· 80
Configuring OSPF route summarization ················································································· 80
Configuring received OSPF route filtering ··············································································· 81
Configuring Type-3 LSA filtering ··························································································· 81
Setting an OSPF cost for an interface ···················································································· 82
Setting the maximum number of ECMP routes ········································································· 82
Setting OSPF preference ···································································································· 83
Configuring discard routes for summary networks ···································································· 83
Configuring OSPF route redistribution ···················································································· 83
Advertising a host route ······································································································ 85
Excluding interfaces in an OSPF area from the base topology ···················································· 85
Tuning and optimizing OSPF networks ························································································· 85
Configuration prerequisites ·································································································· 85
Setting OSPF timers ·········································································································· 85
Setting LSA transmission delay ···························································································· 86
Setting SPF calculation interval ···························································································· 87
Setting the LSA arrival interval ····························································································· 87
Setting the LSA generation interval ······················································································· 87
Disabling interfaces from receiving and sending OSPF packets ··················································· 88
Configuring stub routers ······································································································ 88
Configuring OSPF authentication ·························································································· 89
Adding the interface MTU into DD packets ·············································································· 90
Setting the DSCP value for outgoing OSPF packets ································································· 90
Setting the maximum number of external LSAs in LSDB ···························································· 90
Setting OSPF exit overflow interval ······················································································· 91
Enabling compatibility with RFC 1583 ···················································································· 91
Logging neighbor state changes ··························································································· 92
Configuring OSPF network management ················································································ 92
Setting the LSU transmit rate ······························································································· 93
Setting the maximum length of OSPF packets that can be sent by an interface······························· 93
Enabling OSPF ISPF ········································································································· 93
Configuring prefix suppression ····························································································· 94
Configuring prefix prioritization ····························································································· 95
Configuring OSPF PIC ······································································································· 95
Setting the number of OSPF logs ·························································································· 96
Filtering outbound LSAs on an interface ················································································· 96
Filtering LSAs for the specified neighbor················································································· 97
Configuring GTSM for OSPF ······························································································· 97
Configuring OSPF GR ··············································································································· 98
Configuring OSPF GR restarter ···························································································· 98
Configuring OSPF GR helper ······························································································· 99
Triggering OSPF GR ········································································································ 100
Configuring OSPF NSR ··········································································································· 100
Configuring BFD for OSPF ······································································································· 100
Configuring bidirectional control detection ············································································· 101
Configuring single-hop echo detection ················································································· 101
Configuring OSPF FRR ··········································································································· 101
Configuration prerequisites ································································································ 102
Configuration guidelines ··································································································· 102
Configuration procedure ··································································································· 102
Advertising OSPF link state information to BGP ············································································ 103
Displaying and maintaining OSPF ····························································································· 104
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