When I'm connected to my VPN gateway (Cisco 2800 router) with Cisco VPN client after approximately 45 min. to 1 hour of being connected I'm starting to experience extremely slow connection (I'm unable to ping anything on the corporate LAN side, telnet works, but hardly usable). After reconnecting everything is normal again, but the issue repeats after above mentioned time period. This issue occurs whether the vpn connection is idle or there is a traffic flow. My colleague connected from his home to the same VPN gateway and using the same Cisco VPN Client version (4.6.04.0043). reported me that he doesn't experiencing such issues, so I don't believe that this is a VPN gateway problem. That's why I reinstalled the VPN client, but there is no any improvements in this issue.
'debug crypto ipsec' and 'debug crypto isakmp' outputs tells me like the router is unable to contact my client for renewal of SA before SA timer expires. So, I changed my Internet connection and connected to the Internet via dial-up instead via my home DSL router to eliminate firewall issues, but the problem is still here.
The message in a VPN client log shows : "8 17:53:15.646 08/26/05 Sev=Warning/2 IKE/0xE3000099 Immature Navigation Termination due to error (Navigator:195)". It seems to me that this message is logged right at the time when I'm beginning to experience problem about I'm writing.
Anybody had a similar experience? I'm posting here before contacting Cisco TAC since I believe that this easily could be my Windows XP problem...