interface FastEthernet0/0
ip address 192.168.13.3 255.255.255.0
ip nat outside
!
interface FastEthernet0/1
ip address 192.168.23.3 255.255.255.0
ip nat outside
!
interface FastEthernet1/0
ip address 192.168.34.3 255.255.255.0
ip nat inside
!
ip route 0.0.0.0 0.0.0.0 192.168.13.1 track 1
ip route 0.0.0.0 0.0.0.0 192.168.23.2 200
!
access-list 110 permit ip 192.168.34.0 0.0.0.255 any
!
route-map RM-ISP1 permit 10
match ip address 110
match interface FastEthernet0/0
!
route-map RM-ISP2 permit 10
match ip address 110
match interface FastEthernet0/1
ip nat inside source route-map RM-ISP1 interface FastEthernet0/0 overload
ip nat inside source route-map RM-ISP2 interface FastEthernet0/1 overload
-- Rutas estaticas con IP SLA
ip sla monitor 1
type echo protocol ipIcmpEcho 192.168.13.1 source-interface FastEthernet0/0
timeout 1000
threshold 1000
frequency 5
ip sla monitor schedule 1 life forever start-time now
track 1 rtr 1 reachability
-- PRUEBAS
R3#sh ip route
Gateway of last resort is 192.168.13.1 to network 0.0.0.0
C 192.168.13.0/24 is directly connected, FastEthernet0/0
C 192.168.23.0/24 is directly connected, FastEthernet0/1
C 192.168.34.0/24 is directly connected, FastEthernet1/0
S* 0.0.0.0/0 [1/0] via 192.168.13.1
Si se cae el ISP1
R1(config)#interface FastEthernet0/0
R1(config-if)#shutdown
R3#sh ip route
Gateway of last resort is 192.168.23.2 to network 0.0.0.0
C 192.168.13.0/24 is directly connected, FastEthernet0/0
C 192.168.23.0/24 is directly connected, FastEthernet0/1
C 192.168.34.0/24 is directly connected, FastEthernet1/0
S* 0.0.0.0/0 [200/0] via 192.168.23.2
Comandos utiles
show track 1
sh ip sla statistics
