we have an issue of connection droping between our branch office and HO.
Our branch office is connected to our HO thru a vpn link over ADSL line.
HO is having cisco pix 515 with a fixed ip address and the branch office is having Juniper NS5GT ADSL with dynamic ip.
Connections are established and the ERP and Outlook works fine for some time.After 20-30Minutes,connection drops.It gets reconnected automatically after 5-10 Minutes.
The branch office router log says the following before disconnection
"Cannot connect to e-mail server 188.8.131.52.
2011-04-04 16:07:05 info IKE<184.108.40.206> Phase 2 msg ID <98f4d36b>: Completed negotiations with SPI <3e578c78>, tunnel ID <1>, and lifetime <3600> seconds/<4608000> KB.
2011-04-04 16:07:05 info IKE<220.127.116.11>: Phase 2 msg ID <98f4d36b>: Received responder lifetime notification. (0 sec/4608000 KB)
2011-04-04 16:07:05 info IKE<18.104.22.168>: Received a notification message for DOI <1> <24576> <RESPONDER-LIFETIME>.
2011-04-04 16:07:05 info IKE<22.214.171.124> Phase 2: Initiated negotiations.
2011-04-04 16:07:05 info IKE<126.96.36.199> Phase 1: Completed Main mode negotiations with a <28800>-second lifetime.
2011-04-04 16:07:04 info IKE<188.8.131.52> >> <184.108.40.206> Phase 1: Initiated negotiations in main mode.
2011-04-04 16:06:32 warn Cannot connect to e-mail server 220.127.116.11.
Please advice us how to solve the issue .
Thank you .