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IP Sla monitor operations - with multiple IPs reachability

We have two ISP routers connected to two different ISP, and on routers lan interface we are running HSRP, so one router will be active at a time and traffic will be forwarded to that router A and respective ISP. Also we notice when router A next hop is unreachable and same ethernet WAN interface is showing UP, therefore HSRP is not failing back.

To avoid the above situation, we configured IP SLA as like below

int fa 0/0 (LAN)

standby 1 track 1 shutdown


ip sla 1
icmp-echo x.x.x.x source-ip y.y.y.y
ip sla schedule 1 life forever start-time now

Where x.x.x.x is next hop IP (ISP end) and y.y.y.y is fa 0/1 interface IP (Fa0/1)

This solution worked sucessfully, primary router HSRP went to standby and secondary router came ACTIVE.

Here sometimes we are face issue in internet reachablility but my next hop will be UP. Due this HSRP was not falling back.

To avoid this scenario, we need to monitor reachability of next hop as well as internet, so please suggest any options there.

1 ACCEPTED SOLUTION

Accepted Solutions

IP Sla monitor operations - with multiple IPs reachability

You can use the track's boolean OR operation.

track 10 ip sla 306 reachability

!

track 11 ip sla 307 reachability

!

track 30 list boolean or

object 10

object 11

!

track 300 ip sla 300 reachability

!

track 301 ip sla 301 reachability

!

ip sla 300  !!!! To track Internet host

icmp-echo 4.2.2.2 source-interface F0/0 

ip sla schedule 300 life forever start-time now

ip sla 301  !!!! To track ISP next hop

icmp-echo 10.2.0.202 source-interface F0/0

ip sla schedule 301 life forever start-time now

!

!

int F0/0

standby 1 track 30 shutdown

Please rate replies and mark question as "answered" if applicable.

Please rate replies and mark question as "answered" if applicable.
1 REPLY

IP Sla monitor operations - with multiple IPs reachability

You can use the track's boolean OR operation.

track 10 ip sla 306 reachability

!

track 11 ip sla 307 reachability

!

track 30 list boolean or

object 10

object 11

!

track 300 ip sla 300 reachability

!

track 301 ip sla 301 reachability

!

ip sla 300  !!!! To track Internet host

icmp-echo 4.2.2.2 source-interface F0/0 

ip sla schedule 300 life forever start-time now

ip sla 301  !!!! To track ISP next hop

icmp-echo 10.2.0.202 source-interface F0/0

ip sla schedule 301 life forever start-time now

!

!

int F0/0

standby 1 track 30 shutdown

Please rate replies and mark question as "answered" if applicable.

Please rate replies and mark question as "answered" if applicable.
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