Super-Networking Blog

So if you want to limit one or more of your real servers in a virtual server farm to a certain amount of connections you can do it with the “maxconns” command.

Login to the CSM go into config mode, go into the serverfarm you want to restrict then go into the real server. Type in “maxconns #” replacing the # with the max connections you want to go to that real server. This way if you want to test something under real traffic but don’t want it to get slammed you can.

Also if you specify this command it will send out a syslog when the max has been reached.

%CSM_SLB-6-RSERVERSTATE: Module # server state changed: server X.X.X.X:0 in serverfarm ’serverfarm’ has reached configured max-conns

The CSM will then send the rest of the traffic to the other real servers in that serverfarm.

First you need to know what module your CSM is in, most of you know I am sure but otherwise use this at the enable prompt:

“show module”

Next you need to session into the CSM with the following command replacing the slot number with the module number you found using the command above:

“sessions slot 1 processor 0″

Finally you need to tftp the core dump file off of the CSM with the command:

“tftp core_dump tftp-ip-addr”

You need to replace the tftp-ip-addr with the IP of your TFTP server. Also if you have multiple core dump file you can put the name of the file you want to tftp after tftp-ip-addr.