We currently have a Cisco ACE 4710 that has a server farm load balancing a webpage. Is there anyway for the ACE to present a custom error page if all servers in the farm is unavailable, or would I have to create a 3rd server entry and make it a redirect to another website?
One option would be configuring a specific serverfarm to which you can redirect requests, if the primary serverfarms fails or the associated probe receives an undesired responsecode (eg. 500). Could look something like this:
probe type http CHK_WEB
request method get url /[string]
expect status 200 200
ip addr x.x.x.x
ip addr y.y.y.y
ip addr z.z.z.z
serverfarm host SFARM_WEB
rserver WEB_SRV_A [dst.port]
rserver WEB_SRV_B [dst.port]
serverfarm host OUT_OF_SRVC
rserver OUT_OF_SRVC [dst.port]
policy-map type loadbalance first-match PMAP_LB_WEB
serverfarm SFARM_WEB backup OUT_OF_SRVC
Don't know if this is what you're looking for, but maybe it'll do.
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