ii
Configuring RIP route redistribution····················································································································· 27
Tuning and optimizing RIP networks ···························································································································· 27
Configuring RIP timers··········································································································································· 28
Configuring split horizon and poison reverse ···································································································· 28
Configuring the maximum number of ECMP routes ·························································································· 29
Enabling zero field check on incoming RIPv1 messages ·················································································· 29
Enabling source IP address check on incoming RIP updates ············································································ 29
Configuring RIPv2 message authentication ········································································································ 30
Specifying a RIP neighbor ···································································································································· 30
Configuring RIP-to-MIB binding ···························································································································· 31
Configuring the RIP packet sending rate ············································································································ 31
Configuring BFD for RIP················································································································································· 31
Single-hop echo detection mode ························································································································· 31
Bidirectional control detection mode
··················································································································· 32
Displaying and maintaining RIP ··································································································································· 32
RIP configuration examples ··········································································································································· 33
Configuring RIP version ········································································································································ 33
Configuring RIP route redistribution····················································································································· 34
Configuring an additional metric for a RIP interface
························································································· 36
Configuring RIP to advertise a summary route ··································································································· 38
Configuring BFD for RIP (single-hop echo detection mode) ·············································································· 40
Configuring BFD for RIP (bidirectional control detection mode)······································································· 43
Troubleshooting RIP························································································································································ 47
No RIP updates received ······································································································································ 47
Route oscillation occurred ···································································································································· 47
Configuring OSPF ······················································································································································ 48
Overview········································································································································································· 48
Basic concepts ······················································································································································· 48
Area based OSPF network partition ··················································································································· 50
Router types···························································································································································· 53
OSPF network classification ································································································································· 54
DR and BDR ··························································································································································· 55
OSPF packet formats············································································································································· 56
Supported features ················································································································································ 64
Protocols and standards ······································································································································· 65
OSPF configuration task list ·········································································································································· 65
Enabling OSPF ······························································································································································· 66
Configuration prerequisites ·································································································································· 66
Configuration procedure ······································································································································ 67
Configuring OSPF areas ··············································································································································· 68
Configuration prerequisites ·································································································································· 68
Configuring a stub area ······································································································································· 68
Configuring an NSSA area·································································································································· 69
Configuring a virtual link ······································································································································ 69
Configuring OSPF network types ································································································································· 70
Configuration prerequisites ·································································································································· 70
Configuring the broadcast network type for an interface ················································································· 70
Configuring the NBMA network type for an interface ······················································································ 71
Configuring the P2MP network type for an interface ························································································ 71
Configuring the P2P network type for an interface ··························································································· 72
Configuring OSPF route control ··································································································································· 72
Configuration prerequisites ·································································································································· 72
Configuring OSPF route summarization ············································································································· 73
Configuring OSPF inbound route filtering ·········································································································· 74