IP SLA Config

[rc.castillo]

Hi,

     Has anyone of you implemented IP SLA for dynamic failover? How does this work? do you have any guides on how to implement this.

     Thanks.

[KARUPPUCHAMY MALAIYANDI]

Hi,

Ya, I have configured IP SLA in our network to track the remote ip reacahbility .

If the primary remote link is down, the failoever will happen automatically.

Example :

If you have 2 link to your ISP and if the primary link is down and the traffic has to divert to secondary automatically,then you can use IP SLA to track the primary link.

After that apply this configuration into your inside HSRP config.if primary link is down, then the track will reduce the HSRP priority value from 110 to 80.

Since the default HSRP value 100 is configured in secondary router, all the traffic will go via secondary link and there will be no impact.

Router 1 :

ip sla monitor 1

!

type echo protocol ipIcmpEcho  source-ipaddr 
 frequency 300
!
ip sla monitor schedule 1 life forever start-time now

rtr 1 track 1 reachability


int xxxx
ip address 1.1.1.2 255.255.255.0
standby 2 ip 1.1.1.1
standby 2 priority 110
standby 2 track 1 decrement 30
standby 2 preempt


Router 2:

int xxxx
ip address 1.1.1.3 255.255.255.0
standby 2 ip 1.1.1.1
standby 2 preempt

Regards
Karuppu