After loss of internet L2L VPN doesn't rebuild automatically

I have a couple sites that are connected via a L2L VPN tunnel.

Point A is using a PIX. Point B is using a 3000 VPN Concentrator.

Do I need to change a timer or something? When the internet on point A dies (for whatever reason, crappy internet) then comes back up, the tunnel remains down even though Point B still thinks that it is alive.

The way to remedy this is by doing 'clear crypto session' - This causes the tunnel to rebuild.

What can I do to fix this?

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Comments

mikej412

Use dead peer detection.

mzinz

mikej412 wrote:

Use dead peer detection.

This doesn't rebuild the session, or does it?

If I had DPD enabled, when would it notify me? During debug?

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