Hello All,
I use a 2611XM to route voice traffic. I use two ISPs for failover. I use IP SLA to track the interface and do a failover. Here's the configuration.
track timer interface 5
track 123 rtr 1 reachability
delay down 15 up 10
!
track 345 rtr 2 reachability
delay down 15 up 10
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
ip nat inside
interface FastEthernet0/1
ip address 182.65.23.52 255.255.252.0
ip nat outside
interface Dialer1
ip address negotiated
ip nat outside
ip route 0.0.0.0 0.0.0.0 182.65.23.1 track 123
ip route 0.0.0.0 0.0.0.0 Dialer1 5
ip access-list extended NAT
permit ip 192.168.0.0 0.0.0.255 any
ip nat inside source route-map CABLE interface FastEthernet0/1 overload oer
ip nat inside source route-map DSL interface Dialer1 overload oer
ip sla 1
icmp-echo 182.65.23.1 source-interface FastEthernet0/1
timeout 1000
threshold 40
frequency 3
ip sla schedule 1 life forever start-time now
ip sla 2
icmp-echo 4.2.2.2 source-interface Dialer1
timeout 1000
threshold 40
frequency 3
ip sla schedule 2 life forever start-time now
route-map CABLE permit 10
match ip address NAT
match interface FastEthernet0/1
!
route-map DSL permit 10
match ip address NAT
match interface Dialer1
The problem is that any time an ISP goes down and the other ISP become primary path, I have to clear NAT statement from the router and reboot the phone. I am using an Asterisk based IP PBX as Call Manager and Linksys phones.
Any help on this would be highly appreciated.
Thanks and Regards
OJ
