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Configuring internet failover on a Cisco 2821 using IP SLA configuration

We have multiple cisco routers and most  of them have dual WAN connections thru different ISPs. So, we use IP  SLA monitor with tracking object s to monitor each ISP  availability/reliability and switch routing accordingly ( by IOS). So  far, it has been working ok. However, recently, we had some ISP high  latency and the connection to one ISP will be so slow but the IOS keep  seeing it as UP, thus sending traffic thru it. So, I tried to change  around the threshold numbers around with no luck. Is there any  configuration/commands or tricks that can do the job here? I don't want  the users to be the one to detect the Internet slowness and have me  manually shut down an interface or change the static routes metrics.  here is a sample of my config:

ip sla  1
  type echo protocol ipIcmpEcho x.x.x.x isp 1 gateway
  threshold 3
  frequency 5
ip sla monitor schedule 1 life forever start-time now


ip sla  2
  type echo protocol ipIcmpEcho x.x.x.x isp 2 gateway
  threshold 3
  frequency 5
ip sla monitor schedule 2 life forever start-time now


interface fa0/0/0
ip address x.x.x.x 255.255.255.x isp1
Description Up-Link to isp1
full-duplex
no cdp enable

exit

interface fa0/0/1
ip address x.x.x.x 255.255.255.x isp 2
Description Up-Link to Relience
full-duplex
no cdp enable

exit

interface FastEthernet0/1/0
ip address 172.16.20.254 255.255.255.252
description Inside interface
speed auto
full-duplex
no cdp enable
exit


ip route 0.0.0.0 0.0.0.0 202.63.106.241 track 101   isp1
ip route 0.0.0.0 0.0.0.0 220.225.230.97 track 102   isp2

Problem here is i could not find sla or rtr otion after track 101 ip ?

--------------track 101 ip sla 1 reachability-------------    i could not see any rtr or sla option
--------------track 102 ip sla 2 reachability-------------


--------------track 101 ip rtr 1 reachability-------------    i could not see any rtr or sla option
--------------track 102 ip rtr 2 reachability-------------    i could not see any rtr or sla option

Regards

Kiran Kumar CH

1 Reply 1

Haris P
Level 4
Level 4

Dear Kiran ,

You need the below commands .

Track 101 ip sla 1 reachability

I Guess that you are running ip base images

IPBASE will not support object tracking. You will have to move the IOS to another feature set.

Regards

Haris P

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