Service Unavailable Notification???

Something like this?

when CLIENT_ACCEPTED {
   if {[active_members [LB::server pool]] < 1}{
      TCP::respond "my service down message"
   }
}

And here are the related wiki pages:

http://devcentral.f5.com/wiki/default.aspx/iRules/active_members

http://devcentral.f5.com/wiki/default.aspx/iRules/lb__server

http://devcentral.f5.com/wiki/default.aspx/iRules/tcp__respond

Aaron

Yes!!

 

 

Sorry for the noob question..

 

It's a relatively simple iRule, but not such a simple question. Glad that works for you.

 

 

Aaron

hoolio,

 

 

real quick - this is basically balancing telnet. To return to the client "Service Down" will the above TCP respond suffice?

I'm not sure what a service down message looks like for telnet. If you need to use binary content in the TCP::respond command, you can follow the steps in SOL7875 and use the binary format command:

 

 

sol7875: Certain data may contain values or characters within the ASCII range thar are not printable but need to be processed by an iRule before load balancing or other handling of the data can occur.

 

http://support.f5.com/kb/en-us/solutions/public/7000/800/sol7875.html

 

 

binary format

 

http://www.tcl.tk/man/tcl8.4/TclCmd/binary.htmM5

 

 

Aaron

Hmm...

 

 

A 'standard' 'service down' message for telnet would be a tcp reset...

 

 

 

H

That's easy enough as LTM will send a reset if no pool members are available. No iRule needed.

 

 

Aaron