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Setting the DSCP value for RIP packets ··············································································································· 26

Configuring RIP route control ········································································································································ 27

Configuring an additional routing metric ··········································································································· 27

Configuring RIPv2 route summarization·············································································································· 27

Disabling host route reception ····························································································································· 28

Advertising a default route ··································································································································· 29

Configuring inbound or outbound route filtering ······························································································· 29

Configuring a priority for RIP ······························································································································· 30

Configuring RIP route redistribution ····················································································································· 30

Tuning and optimizing RIP networks ···························································································································· 31

Configuring RIP timers ··········································································································································· 31

Configuring split horizon and poison reverse ···································································································· 31

Configuring the maximum number of ECMP routes ·························································································· 32

Enabling zero field check on incoming RIPv1 messages ·················································································· 32

Enabling source IP address check on incoming RIP updates ············································································ 33

Configuring RIPv2 message authentication ········································································································ 33

Specifying a RIP neighbor ···································································································································· 33

Configuring RIP-to-MIB binding ···························································································································· 34

Configuring the RIP packet sending rate ············································································································ 34

Configuring RIP FRR ······················································································································································· 34

Configuring BFD for RIP ················································································································································· 35

Single-hop echo detection mode ························································································································· 36

Bidirectional control detection mode ··················································································································· 36

Displaying and maintaining RIP ··································································································································· 36

RIP configuration examples ··········································································································································· 37

Configuring RIP version ········································································································································ 37

Configuring an additional metric for a RIP interface ························································································· 41

Configuring RIP to advertise a summary route ··································································································· 42

RIP FRR configuration example ···························································································································· 45

Configuring BFD for RIP (single-hop echo detection mode) ·············································································· 46

Configuring BFD for RIP (bidirectional control detection mode) ······································································· 49

Troubleshooting RIP ························································································································································ 53

No RIP updates received ······································································································································ 53

Route oscillation occurred ···································································································································· 53

Configuring OSPF ······················································································································································ 54

Hardware compatibility ················································································································································· 54

Overview ········································································································································································· 54

Basic concepts ······················································································································································· 54

Area based OSPF network partition ··················································································································· 56

Router types ···························································································································································· 59

OSPF network classification ································································································································· 60

DR and BDR ··························································································································································· 61

OSPF packet formats ············································································································································· 62

Supported features ················································································································································ 70

Protocols and standards ······································································································································· 71

OSPF configuration task list ·········································································································································· 71

Enabling OSPF ······························································································································································· 72

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

Configuration procedure ······································································································································ 73

Configuring OSPF areas ··············································································································································· 74

Configuring a stub area ······································································································································· 74

Configuring an NSSA area ·································································································································· 75