ip sla

[mialbert]

i'm running ip sla for isp failover/failback on an isr 1900 with below configuration:

track 1 ip sla 1 reachability
 delay down 180
ip sla 1
 icmp-echo 4.2.2.2 source-interface FastEthernet0/0
 timeout 500
 threshold 250
 frequency 1
ip sla schedule 1 life forever start-time now

When i do a cable pull test(pulling cable from isp1 interface and put back)failover/failback works fine.  Sometimes, during actual outages, it fails over fine but does not failback.  Does running icmp-echo instead of another method effect this?  Is it better to make the icmp target the isp modem instead of a dns server on the internet?

[anonuevo_rex]

Hi mialbert

Do you have a static route for 4.2.2.2 pointing to your fa0/0 as the exit interface?

Regards,

Rex

[Sajid Ali]

Hi mialbert,

Please let know is you are running BGP to connect with ISP ? and what is reason of outage, physical or network layer issue ?

Sajid Ali Pathan