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IP SLA failover config

I'm new to networking, and I need some help on IPSLA failover config.

I have a router that I have recently configured ( thanks to all of you for the assistance ), and now I need to configure it for IPSLA failover.


I have 3 int connections, g0/0 (LAN), g0/1 (WAN), and ATM0/0 (DSL). I would like to configure one of those (the LAN & DSL) int to take over after the other has failed .The router is Cisco 1941.

How would I configure my router for failover?

Would I create 2 route-maps?

route-map int g0/0   <---------- is this right?

match ip add 1

match interface int x/x   <----- what would that be?

route-map DSL   <------ would that be ATM0/0 or DSL?

match ip address 1

match interface dialerx

create the ACL 1

access-list 1 permit x.x.x.x y.y.y.y  <------- (where x.x.x.x is the subnet I want to be natted and y.y.y.y is wildcard mask)

create 2 dynamic nat entries

ip nat inside source route-map int g0/0 interface int g0/0 overload   <---------- is this correct?

ip nat inside source route-map DSL interface dialerx overload

create the ip sla action

ip sla 1

  icmp-echo x.x.x.x.x where x.x.x.x is the next-hop on serial link   <------------ totally clueless here

  timeout xxx    how many time without a response so ip sla fails and tracked object is down  <-------- what is the standard default setting?

  frequency xxx  how often you send the ping   <-------- what is the standard default setting?


ip sla schedule 1 start-time now life forever  start the ip sla action

track 1 rtr 1 reachability  <---------- do I need to create this tracking object?

create 2 default routes, the backup one has an AD higher than primary and you gonna track the primary

ip route int g0/0 track 1

ip route dialer x 100


- Joey