i use site-to-site vpn between 2 cisco routers 1812 and time ti time the vpn connection hangs, I don't know why...I have to reload!
Today it stoped working again but reload didnt help.
i did run from SDM tunnel test and I have this error:
A ping with data size of this VPN interface MTU size and "Do not fragment" bit set to the other and VPN device is falling. This may happendif there is a lesser MTU network which drops the "Do not fragment" packets.
The vpn is establesed but I cannot ping the other end of the vpn.
I tried to lower the mtu size
ip tcp adjust-mss 1350
but it didnt work ...
Do u know this error? any solution pls ?