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EAX_25745's avatar
EAX_25745
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Mar 27, 2013

F5 and Cisco ASR SLA

Hi,   I have a scenerio where we have two F5s (Active / Standby) mesh connected to Cisco ASR 9000 routers with /31 subnets for the mesh connecitivty.   How can we implement SLA on the Cisco ASR...
config
design
EAX_25745's avatar
EAX_25745
Icon for Nimbostratus rankNimbostratus
Oct 31, 2014

Hi,

 

We currently use OSPF with the 4 x /30 links with an active/standby configuration connecting to two ASR9006 routers.

 

When using OSPF the F5 devices now change the cost of the routes depending on which unit is active. So when failover occurs it will immediately change the cost of the OSPF routes for the standby unit to be the highest and the active units routes to the lowest value.

 

This now happens automatically but i recall somehow that in the past i had to change config or add an irule to get this to work.

 

  • aj1's avatar
    aj1
    Icon for Nimbostratus rankNimbostratus
    May 06, 2015
    Hi EAX, apologize for bothering you again. Just wondering if you use floating self-ips on the external vlans, since active/standy ospf works with static self-ips (p2p mesh between two routers and the two LTMs). Thanks.