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Configuring the P2P network type for an interface ··························································································· 72

Configuring OSPF route control ··································································································································· 72

Configuration prerequisites ·································································································································· 72

Configuring OSPF route summarization ············································································································· 73

Configuring received OSPF route filtering ·········································································································· 74

Configuring Type-3 LSA filtering ·························································································································· 74

Configuring an OSPF cost for an interface ········································································································ 74

Configuring the maximum number of ECMP routes ·························································································· 75

Configuring OSPF preference ······························································································································ 75

Configuring OSPF route redistribution ················································································································ 76

Advertising a host route ········································································································································ 77

Tuning and optimizing OSPF networks ························································································································ 77

Configuring OSPF timers ······································································································································ 78

Specifying LSA transmission delay ······················································································································ 79

Specifying SPF calculation interval ······················································································································ 79

Specifying the LSA arrival interval ······················································································································· 80

Specifying the LSA generation interval ··············································································································· 80

Disabling interfaces from receiving and sending OSPF packets ······································································ 81

Configuring stub routers ······································································································································· 81

Configuring OSPF authentication ························································································································ 82

Adding the interface MTU into DD packets ········································································································ 83

Configuring a DSCP value for OSPF packets ····································································································· 83

Configuring the maximum number of external LSAs in LSDB ··········································································· 84

Configuring OSPF exit overflow interval ············································································································· 84

Enabling compatibility with RFC 1583 ··············································································································· 84

Logging neighbor state changes ·························································································································· 85

Configuring OSPF network management ··········································································································· 85

Configuring the LSU transmit rate ························································································································ 86

Enabling OSPF ISPF ·············································································································································· 86

Configuring prefix suppression····································································································································· 87

Configuring prefix suppression for an OSPF process ······················································································· 87

Configuring prefix suppression on an interface ································································································· 87

Configuring prefix prioritization ··································································································································· 88

Configuring OSPF PIC ··················································································································································· 88

Configuring OSPF GR ··················································································································································· 88

Configuring OSPF GR restarter ···························································································································· 89

Configuring OSPF GR helper ······························································································································· 90

Triggering OSPF GR ············································································································································· 90

Configuring BFD for OSPF ············································································································································ 91

Configuring bidirectional control detection ········································································································ 91

Configuring single-hop echo detection ··············································································································· 91

Configuring OSPF FRR ··················································································································································· 91

Configuration guidelines ······································································································································ 92

Configuring OSPF FRR to calculate a backup next hop using the LFA algorithm ·········································· 92

Configuring OSPF FRR to specify a backup next hop using a routing policy ················································· 93

Displaying and maintaining OSPF ······························································································································· 93

OSPF configuration examples ······································································································································ 95

Basic OSPF configuration example ····················································································································· 95

OSPF route redistribution configuration example ······························································································ 98

OSPF summary route advertisement configuration example ············································································ 99

OSPF stub area configuration example ············································································································ 102

OSPF NSSA area configuration example ········································································································ 105