iii
Configuring a virtual link ··························································································································· 76
Configuring OSPF network types ····················································································································· 77
Configuration prerequisites ······················································································································ 77
Configuring the broadcast network type for an interface·········································································· 77
Configuring the NBMA network type for an interface ··············································································· 77
Configuring the P2MP network type for an interface················································································ 78
Configuring the P2P network type for an interface··················································································· 79
Configuring OSPF route control ······················································································································· 79
Configuration prerequisites ······················································································································ 79
Configuring OSPF route summarization ·································································································· 79
Configuring received OSPF route filtering ································································································ 80
Configuring Type-3 LSA filtering ·············································································································· 80
Setting an OSPF cost for an interface······································································································ 81
Setting the maximum number of ECMP routes ························································································ 82
Setting OSPF preference ························································································································· 82
Configuring discard routes for summary networks ··················································································· 82
Configuring OSPF route redistribution ····································································································· 83
Advertising a host route ··························································································································· 84
Excluding interfaces in an OSPF area from the base topology································································ 84
Tuning and optimizing OSPF networks ············································································································ 84
Configuration prerequisites ······················································································································ 84
Setting OSPF timers ································································································································ 85
Setting LSA transmission delay ··············································································································· 86
Setting SPF calculation interval ··············································································································· 86
Setting the LSA arrival interval ················································································································· 86
Setting the LSA generation interval·········································································································· 87
Disabling interfaces from receiving and sending OSPF packets ····························································· 87
Configuring stub routers ··························································································································· 88
Configuring OSPF authentication············································································································· 88
Adding the interface MTU into DD packets ······························································································ 89
Setting a DSCP value for OSPF packets ································································································· 90
Setting the maximum number of external LSAs in LSDB········································································· 90
Setting OSPF exit overflow interval·········································································································· 90
Enabling compatibility with RFC 1583······································································································ 90
Logging neighbor state changes ·············································································································· 91
Configuring OSPF network management ································································································ 91
Setting the LSU transmit rate ··················································································································· 92
Enabling OSPF ISPF ······························································································································· 93
Configuring prefix suppression ················································································································· 93
Configuring prefix prioritization ················································································································· 94
Configuring OSPF PIC ····························································································································· 94
Setting the number of OSPF logs ············································································································ 95
Filtering outbound LSAs on an interface ·································································································· 96
Filtering LSAs for the specified neighbor ································································································· 96
Configuring GTSM for OSPF ··················································································································· 96
Configuring OSPF GR······································································································································ 97
Configuring OSPF GR restarter ··············································································································· 97
Configuring OSPF GR helper ··················································································································· 98
Triggering OSPF GR ································································································································ 99
Configuring OSPF NSR ··································································································································· 99
Configuring BFD for OSPF····························································································································· 100
Configuring bidirectional control detection ····························································································· 100
Configuring single-hop echo detection ··································································································· 100
Configuring OSPF FRR·································································································································· 101
Configuration prerequisites ···················································································································· 101
Configuration guidelines ························································································································· 101
Configuration procedure ························································································································· 101
Advertising OSPF link state information to BGP ···························································································· 103
Displaying and maintaining OSPF ················································································································· 103
OSPF configuration examples ······················································································································· 104
Basic OSPF configuration example ······································································································· 104
OSPF route redistribution configuration example ·················································································· 107
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