Implementation of forward secrecy in LTM

can you try something like this?

[root@B3600-R67-S42:Active:Standalone] config  tmsh show sys version

Sys::Version
Main Package
  Product  BIG-IP
  Version  11.3.0
  Build    2806.0
  Edition  Final
  Date     Tue Nov 13 22:34:00 PST 2012

[root@B3600-R67-S42:Active:Standalone] config  tmm --clientcipher 'DHE+HIGH:@STRENGTH'
     ID SUITE                          BITS  PROT  METHOD CIPHER MAC    KEYX
 0:  57 DHE-RSA-AES256-SHA              256  SSL3  Native AES    SHA    EDH/RSA
 1:  57 DHE-RSA-AES256-SHA              256  TLS1  Native AES    SHA    EDH/RSA
 2:  57 DHE-RSA-AES256-SHA              256  TLS1.1  Native AES    SHA    EDH/RSA
 3:  57 DHE-RSA-AES256-SHA              256  TLS1.2  Native AES    SHA    EDH/RSA
 4:  57 DHE-RSA-AES256-SHA              256  DTLS1  Native AES    SHA    EDH/RSA
 5:  22 DHE-RSA-DES-CBC3-SHA            192  SSL3  Native DES    SHA    EDH/RSA
 6:  22 DHE-RSA-DES-CBC3-SHA            192  TLS1  Native DES    SHA    EDH/RSA
 7:  22 DHE-RSA-DES-CBC3-SHA            192  TLS1.1  Native DES    SHA    EDH/RSA
 8:  22 DHE-RSA-DES-CBC3-SHA            192  TLS1.2  Native DES    SHA    EDH/RSA
 9:  22 DHE-RSA-DES-CBC3-SHA            192  DTLS1  Native DES    SHA    EDH/RSA
 
root@(B3600-R67-S42)(cfg-sync Standalone)(Active)(/Common)(tmos) list ltm profile client-ssl pfs-clientssl
ltm profile client-ssl pfs-clientssl {
    app-service none
    ciphers DHE+HIGH:@STRENGTH
}