CSM - backup reals not working as expected.

philip.neeson · ‎08-13-2008

Hi,

I'm working on a config where the customer wants to both backup serverfarms on a CSM, which works and then within each farm, have a backup real.

The following config has been configured, however in serverfarm L1, both reals N01 and S01 are being used to balance connections, not just N01 as was expected. I have dug through the docs on CCO but it seems quite unclear to me. Any ideas, I have worked with server farms backing each other up within a vserver, but haven't seen this tried before.

!

serverfarm L1

nat server

nat client HIDE

real name S01

backup real name N01

inservice

real name N01

inservice standby

probe LDAP

!

serverfarm L2

nat server

nat client HIDE

real name S02

backup real name N02

inservice

real name N02

inservice

probe LDAP

!

vserver V1

virtual 1.1.1.1

serverfarm L1 backup L2

replicate csrp connection

no persistent rebalance

inservice

!

SW#sh mod csm 1 serverfarms name L1

nat = SERVER, CLIENT(HIDE)

virtuals inservice = 1, reals = 2, bind id = 0, fail action = none

inband health config: <none>

retcode map = <none>

Probes:

LDAP, type = script

Real servers:

N01, weight = 8, OPERATIONAL, conns = 27

S01, weight = 8, OPERATIONAL, conns = 26

Total connections = 47

!

Any help would be appreciated.

Regards,

Philip.

Gilles Dufour · ‎08-14-2008

what software version ?

This works for me in 4.2.8

Gilles.

philip.neeson · ‎08-14-2008

Hi Gilles,

Thanks, thats interesting, we use 4.2.4.

So the config is fine how it is and should only use the backup reals when the primary fails.

I suppose its likely a bug then.

Philip.