auto-summary in RIP affects what is advertised, but not the local RIB. Preventing route feedback: Prevent router feedback (RIP) with static route to null0 or distribute-list (IN) on originating router.
interface> ip rip advertise (interval different than the global)
default sent out specific interface: use route-map that sets interface and default-information originate. DON'T FORGET ABOUT ROUTE FEEDBACK IN RIP!
ACL to filter even/odd octets:
ip access permit 0.0.1.0 255.255.254.255 : permit 3rd octet odd only ip access permit 0.0.0.0 255.255.254.255 : permit 3rd octet even only
Track route with route-map for default route injection. Reliable Conditional Default Routing:
R1: track 1 ip sla 1 reachability router rip version 2 default-information originate route-map SLA ip route 184.108.40.206 255.255.255.255 Null0 name BOGUS track 1
ip prefix-list SLA seq 5 permit 220.127.116.11/32 ip sla 1 icmp-echo 18.104.22.168 source-interface FastEthernet0/0 ip sla schedule 1 life forever start-time now ! route-map SLA permit 10 match ip address prefix-list SLA
RIP Unicast updates: neighbor statement and passive interface command. Without passive interface, broadcast and multicast updates will continue to be sent. RIP Broadcast Update: interface> ip rip v2-broadcast
RIP Triggered Updates: interface> ip rip triggered RIP Source Validation: (Do I have a path bath in the RIB?) Router RIP no validate-update-source (to disable check)