How to Implement a keepAlive Client-Side Connection

it might, but why send the extra traffic? just increase the tcp timeout as richard suggests seems more logical.i think it holds memory and how we know if timeout value is long enough.

In that case the server has to send the TCP Keep alive, the LTM will not send a TCP keep-alive.i do not think so.

sol7559: Overview of the TCP profile

http://support.f5.com/kb/en-us/solutions/public/7000/500/sol7559.html

[root@ve10:Active] config  b virtual bar list
virtual bar {
   pool foo
   destination 172.28.19.79:22
   ip protocol 6
   profiles {
      tcp3s {
         serverside
      }
      tcp5s {
         clientside
      }
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:22 {}
}
[root@ve10:Active] config  b profile tcp3s list
profile tcp tcp3s {
   defaults from tcp
   keep alive interval 3
}
[root@ve10:Active] config  b profile tcp5s list
profile tcp tcp5s {
   defaults from tcp
   keep alive interval 5
}

 clientside
[root@ve10:Active] config  tcpdump -nni external not host 172.28.19.80 and port 22
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on external, link-type EN10MB (Ethernet), capture size 108 bytes
23:34:23.165953 IP 172.28.19.79.22 > 172.18.205.120.21508: . ack 3549108548 win 32768
23:34:23.209586 IP 172.18.205.120.21508 > 172.28.19.79.22: . ack 1 win 254
23:34:28.209680 IP 172.28.19.79.22 > 172.18.205.120.21508: . ack 1 win 32768
23:34:28.254657 IP 172.18.205.120.21508 > 172.28.19.79.22: . ack 1 win 254
23:34:33.254961 IP 172.28.19.79.22 > 172.18.205.120.21508: . ack 1 win 32768
23:34:33.297428 IP 172.18.205.120.21508 > 172.28.19.79.22: . ack 1 win 254

 serverside
[root@ve10:Active] config  tcpdump -nni internal not host 172.28.19.80 and port 22
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on internal, link-type EN10MB (Ethernet), capture size 108 bytes
23:35:01.613940 IP 172.18.205.120.21508 > 200.200.200.101.22: . ack 4072446330 win 32768
23:35:01.615544 IP 200.200.200.101.22 > 172.18.205.120.21508: . ack 1 win 80
23:35:04.615892 IP 172.18.205.120.21508 > 200.200.200.101.22: . ack 1 win 32768
23:35:04.617456 IP 200.200.200.101.22 > 172.18.205.120.21508: . ack 1 win 80
23:35:07.617801 IP 172.18.205.120.21508 > 200.200.200.101.22: . ack 1 win 32768
23:35:07.619647 IP 200.200.200.101.22 > 172.18.205.120.21508: . ack 1 win 80