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Forum Discussion

Qasim's avatar
Qasim
Icon for Cirrostratus rankCirrostratus
Jun 03, 2019

GTM + LTM-VS+Irule and dynamic failover

Hi,   I need a little help here. I have two DCs so two ltms and GTMs. On LTMs I am using an Irule which means the VS don't go down if the pool goes do gown. hence the wide IP on GTM doesnt see ...
Qasim's avatar
Qasim
Icon for Cirrostratus rankCirrostratus
Jun 19, 2019

ok make sense thanks.

 

however, can I add another http error code to the above IRULE example? e.g. If I want to monitor 2 http error codes i.e. 503 and 403? also can we not amend the IRULE to mark the VS down if all the nodes in a single pool are responding with error or not available? if so, can you show us an example please?

 

Many thanks for your help so far.

 

Regards,

Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
Jun 20, 2019

You can only mark a VS down if the default pool assigned to the VS goes down.

This is why I suggested an iRule that sends a response if a pool used in the iRule is down. What you send back to GTM doesn't matter as long as the health monitor marks the VIP down.

 

When GTM sees that a pool is down, it will mark the whole VIP down. For that reason it makes sense to send the same response for each pool like I've already suggested.