IP sla on 3750

[Parag Shingala]

Hi ,

I have a question when we configure IP sla for dynamic fail over it works as expected but when the link switched to the back up link it has intermittently disconnects and then comes back up.We hav etested its not the issue with the service provider side.

Please let me know if you need any more information.

Any thoughts will be greatly appreciated.

Thanks

-P

[jawad-mukhtar]

yes it works When Primary Links Goes Down Your all the traficc will be Shifted to Backup and When Primary come Up your all the traffic will be shifted to primary link

track 1

ipsla 1

icmp-echo (next Hope Address)

track2

ipsla 2

icmp-echo (next Hope Address0

ip route (Destination Netowrk Subnet Your Want to Reach 192.168.1.x/24) 1 Next Hope IP Address

ip route (Destination Netowrk Subnet Your Want to Reach 192.168.1.x/24) 2 Next Hope IP Address

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[Parag Shingala]

Hi Jawad,

This works for me but the issue I am seeing is that there are unsucessful ping after it fails over to the backup link, and if I connect a PC directly to the provider router there are no ping drops.Also the weard part is there are only 3 unsucessful ping after few seconds.

I am posting the configuration for your reference:

ip sla 1

icmp-echo 8.8.8.8

threshold 2

timeout 1000

frequency 3

ip sla schedule 1 life forever start-time now

track 1 ip sla 1 reachability

ip route 0.0.0.0  0.0.0.0 xx.xx.xx.xx  track 1

Please let me know if you need any more information.

Thanks for the rersponse.

[jawad-mukhtar]

Post your relevant Track and SLA config wiht IPS

and have you check are u getting pings drops form backup link if you connect your laptop directly to that link.

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[Parag Shingala]

Hi,

ip sla 1

icmp-echo 8.8.8.8

threshold 2

timeout 1000

frequency 3

ip sla schedule 1 life forever start-time now

track 1 ip sla 1 reachability

ip route 0.0.0.0  0.0.0.0 xx.xx.xx.xx  (Public IP) track 1

ip route 0.0.0.0  0.0.0.0 xx.xx.xx.xx  (Public IP) 245

track 1 ip sla 1 reachability

Please let me know if you need more information.

Thanks

-P

[jawad-mukhtar]

When you shift you traffic to failover check you track is down.

show track brief

and check your 1 default router is active or both

by using show ip route.

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