topic Re: Priority based Rserver activation - ACE Load Balancing in Application Networking

Priority based Rserver activation - ACE Load Balancing

tech_trac — Mon, 15 Jun 2009 15:44:21 GMT

Hi,

I know certain load balancers which have priority based pool member activation for e.g. the server farm has two rservers. And all the traffic is sent to Rserver1, even though Rserver2 is live.

The traffic is forwarded to Rserver2 only when Rserver1 is down.

Is this possible with Cisco ACE ?

Thanks.

Re: Priority based Rserver activation - ACE Load Balancing

ciscocsoc — Tue, 16 Jun 2009 05:36:06 GMT

Hi,

Yes this is possible. Use the backup-rserver option.

E.g.

serverfarm host SF-App

rserver server1

backup-rserver server2

inservice

rserver server2

inservice standby

HTH

Cathy

Re: Priority based Rserver activation - ACE Load Balancing

tech_trac — Tue, 16 Jun 2009 07:03:31 GMT

Thanks.

What if I need to cover both ways i.e.

If R1 fails R2 takes over. And when R1 comes up or when R2 goes down, R1 takes over (if available) from R2.

Re: Priority based Rserver activation - ACE Load Balancing

ciscocsoc — Tue, 16 Jun 2009 07:11:41 GMT

The config does what you want. In all cases on the ACE, the backup - be it server or serverfarm relinquishes control when the primary comes back.

Kind Regards

Cathy

Re: Priority based Rserver activation - ACE Load Balancing

dario.didio — Tue, 16 Jun 2009 07:12:23 GMT

Hi,

in the example above, when R1 fails, R2 takes over. From the moment R1 becomes alive again, R2 goes again into standby state, so all traffic is send again to R1.

If R2 fails, nothing will happen because it was in standby state.

HTH,

Dario

Re: Priority based Rserver activation - ACE Load Balancing

jteixido — Wed, 15 Jul 2009 13:24:37 GMT

Cathy,

You rule; I just got a request to do what you just described.

Thank you,

John...