PIX VPN strange problem

Hi,

I have a strange problem. I have a PIX 515 at central office and a PIX 506e at the remote office.

We have VPN site to site working.

When the VPN times out the VPN tunnel comes down.

The strange things is:

when i try to send a ping from the central office to the remote office the ping fails, however, a vpn is created (show crytpo isakmp sa).

If i ping from the remote office to the central office the ping works. After the this i am able to ping from the central office to the remote office.

I want to be able to start the connection from the central office. What is the problem?

Thanks

wtpandar

[swapnendu]

check the NO NAT and crypto ACLs on central office thoroughly..

had the same issue betwn two of our sites...dont remember how exactly i fixed tht...will give u a definte answer tomorw after verify'g the config in my office....

swapnendu
CCSP