I have some 5 branch sites. All are having cisco 1811 being used for VPN connectivity. The IOS details are as below.
Cisco IOS Software, C181X Software (C181X-ADVIPSERVICESK9-M), Version 12.4(15)T10, RELEASE SOFTWARE (fc3)
There is a strange issue. Once during a day VPN tunnels get failed and for this i need to restrt the router. After restrt things goes fine. (VPN tunnel config are ok).
Can any body plz advice me wht the issue may be? It this any known Software bug ?
Any further troubleshooting guidelines?