HTTP Return Code on CSM causes IP Sticky does not work

I have CSM running on 3.1(1a).
I configured HTTP Return Code Checking:
map HTTPCHECK retcode
match protocol http retcode 404 404 action remove 5 reset 60
And apply it to the following web server serverfarm:
serverfarm DCMSWEB
nat server
no nat client
predictor leastconns
retcode-map HTTPCHECK
real 10.1.31.1
inservice
real 10.1.31.2
inservice
I also configure IP sticky for my web server:
sticky 2 netmask 255.255.255.255 timeout 60
And apply that sticky to the virtual server:
vserver DCMSWEBHTTP
virtual 10.1.30.100 tcp www
serverfarm DCMSWEB
sticky 60 group 2
replicate csrp sticky
replicate csrp connection
persistent rebalance
inservice
But, the problem is my sticky does not work if I apply HTTP return code checking on the serverfarm.
"show mod contentswitchingmodule 8 sticky" does not show any IP sticky connection.
If I remove HTTP return code checking from serverfarm, my IP sticky is back to normal.
Has anyone encoutered this similar problem before?
Is this a bug on the CSM software?

This is a new bug.
The workaround is to use the command 'client 0.0.0.0 /0' under the vserver.
Gilles.

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Hey again.
I have been looking into the CSM return code checking feature as suggested by this forum. This is a little closer to what I am looking for but I have question about what happens when there is a failure.
If a 500 code for HTTP is seen three times, for example, and the server is removed from the farm, is the original request from the client tried on the next server? Or is a reset sent back to the client, or the original code, and the client must try again.
I am trying to understand if the client will notice if the CSM noticed X number of a particular error and removed the server from the farm.
Thanks for any help!
/ahuffer/

I think you are mixing two things up(Inband health monitoring & HTTP return code checking).
The "Inband health monitoring" feature checks for both RSTs from a server and the failure of the server to respond to a SYN. If a SYN ACK response to a SYN is not received,the TCP portion of the code will perform several retries of a SYN before timing it out.
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CSM(config-slb-sfarm)# health retries 10 failed 50
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"HTTP Return Code checking" is the CSM feature that can be configured to take a server out of use in response to receiving specific return codes.
When HTTP return code checking is configured, the CSM monitors HTTP responses from all balanced HTTP connections and logs the occurrence of the return code for each real server. The CSM stores return code counts. When a threshold for a return code is reached, the CSM may send syslog messages or remove the server from service.
Unlike "Inband Health monitoring", "Http Return code checking" feature has a small (estimated in 10-15%) impact on CPS setup rate, since it requires parsing L5 information in the server-to-client direction.
If the server is taken out of service, Client's request will be loadbalanced among available servers.
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Is there a way to direct requests based on HTTP return-code checking?

I'd like to implement a policy based on return-code. The algorithm is as below,
If HTTP return-code == 500 to 600
serverfarm1
else
serverfarm2
We have a CSM V3.2. Can someone tell me if this is doable? If yes, would you please tell me how.
Appreciation, Q.Xie

The solution I suggested is still what I recommend.
What you have to do is split your serverfarm in multiples instances. One for HTTP and another one for the rest of your applications. Or you could do one for each application.
The serverfarm for HTTP will have the HTTP probe and will go down when the response is 500-600.
The other serverfarm(s) will not use the same HTTP probe and should not go down based on the response code.
ie:
serverfarm WEB
real 10.10.10.10
ins
real 20.20.20.20
ins
probe http
serverm ALL
real 10.10.10.10
ins
real 20.20.20.20
ins
no probe
vserver web
vip 1.1.1.1 tcp 80
serverfarm WEB backup WEB_B
vserver all
vip 1.1.1.1 any
serverfarm ALL
Hope this helps.
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HTTP Return Code on CSM causes IP Sticky does not work

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