SSL cache does not work

Basically, two SSL virtual servers , SSL cache works on one VS, does not work another VS, SSL profile config is below. the only difference between two SSL profiles is just the cache size. the cache does not work on the profile with default setting. I wonder if anyone had this experience before.

 

Thanks.

 

 

below is the SSL client profile which cache does not work, I did ssldunp, the sessionid in serverhello message is zero, but i do not know why F5 sends zero sessionID.

 

 

defaults from clientssl

 

mode enable

 

key "i1key"

 

cert "1.crt"

 

chain "2crt"

 

ca file "3.crt"

 

crl file none

 

client cert ca none

 

ciphers "ALL:!ADH:!LOW:!EXP:!SSLv2:!NULL:!MEDIUM:!RC4:HIGH:RSA"

 

passphrase none

 

options none

 

modssl methods disable

 

cache size 20000

 

cache timeout 3600

 

renegotiate period indefinite

 

renegotiate size indefinite

 

renegotiate max record delay 10

 

handshake timeout 60

 

alert timeout 60

 

peer cert mode require

 

authenticate once

 

authenticate depth 9

 

unclean shutdown enable

 

strict resume disable

 

nonssl disable.

 

}