iRule and Cookie persistence

tmsh show sys connection has filters. Do not use this command without the filters. Don't feed tmsh show sys connection into grep as this will still list all the connections on the F5 and then pass them to grep. Use the builtin filters cs-server-addr, cs-client-addr and so on to limit the output from the command. cs is for clientside, ss is for serverside. See the help for the command.