Backup Wan Link configuration

[Deepak Suryavanshi]

Hello All Experts.

We have recently shifted from 2Mbps to 10Mbps. 10Mbps is terminated directly on router on fa0/1 and 2Mbps is a serial link.

I was thinking of utilizing the 2Mbps as a backup link instead of terminating.

Is it possible to configure serial 2Mbps as backup link.

Can some one help me with the configuration part

my current config is

interface FastEthernet0/0
description "Connected to ****** Lan"
ip address *.*.*.* 255.255.255.248
ip route-cache flow
duplex auto
speed auto
!
interface FastEthernet0/1
description "Connected to ****** Link"
bandwidth 10000
ip address 10.10.10.1 255.255.255.252
ip route-cache flow
shutdown
duplex auto
speed auto
traffic-shape group 100 4000000 100000 100000 1000
!
interface Serial0/0/0
ip address 10.10.10.1 255.255.255.252
ip route-cache flow
no fair-queue
!
ip classless
ip route 0.0.0.0 0.0.0.0 X.X.X.53
ip route x.x.x.x 255.255.255.0 10.10.10.2
ip route x.x.x.x 255.255.255.0 10.10.10.2
ip flow-export source FastEthernet0/1
ip flow-export version 5
ip flow-export destination X.X.X.X 9996
!
ip http server
ip http port 1311
ip http authentication local
ip http max-connections 1
!
snmp-server community public RO
snmp-server ifindex persist
!
control-plane
!
banner motd ^CWelcome to ****** Router^C
!
line con 0
line aux 0
line vty 0 4
login local
transport input telnet
!
end

[sean_evershed]

I suggest you configure Reliable Static Routing Backup Using Object Tracking. See below a configuration guide:

http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html#wp1071672

Cheers

Sean

[Deepak Suryavanshi]

Sean,

Thanks for the update, I will try the same and trouble you again if I get stuck

Regards

Deepak

[Deepak Suryavanshi]

Sean,

I tried to configure as per the example "Configuring Reliable Static Routing Backup Using Object Tracking: DHCP Example

The following example configures the Reliable Static Routing Backup Using Object Tracking feature using DHCP. The primary interface is an Ethernet interface, and the backup interface is a serial interface. This example applies to Cisco IOS Release 12.3(14)T and later releases."

However I am not sure how will I implement it in my kind of senario as there is no DHCP configured or used in the router.

Can you please guide me on this.

Deepak Suryavanshi

[Akula Jyoti Lakshmi]

Please make following chnages

!
interface FastEthernet0/1
description "Connected to ****** Link"
bandwidth 10000
ip address 10.10.10.1 255.255.255.252
ip route-cache flow
no shutdown  <<< Turn on this circuit
duplex auto
speed auto
traffic-shape group 100 4000000 100000 100000 1000
!
interface Serial0/0/0
ip address 10.10.10.1 255.255.255.252
ip route-cache flow
no fair-queue
!
i

ip route 0.0.0.0 0.0.0.0 FastEthernet0/1

ip route 0.0.0.0 0.0.0.0 Serial0/0/0 100 <<< You can increase AD value to 100.

This should work . Otherwise you can work via SLA tracking feature.

router#config terminal 
router(config)#ip sla 1 
router(config-ip-sla)#icmp-echo  source-int router(config-ip-sla-echo)#exit 

router(config)#ip sla 2 
router(config-ip-sla)#icmp-echo  source-int 
router(config-ip-sla-echo)#exit 
router(config)#ip sla schedule 1 life forever start-time now
router(config)#ip sla schedule 2 life forever start-time now 
router(config)#track 1 rtr 1 reachability 
router(config)#track 2 rtr 2 reachability 
router(config-track)#exit 
router(config)#ip route 0.0.0.0 0.0.0.0  track 1 
router(config)#ip route 0.0.0.0 0.0.0.0  track 2 

Please let me know if it helps