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revive site to site cisco VPN Tunnel

brittonv
brittonv asked
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Last Modified: 2012-05-07
I have 2 firewalls that I have inherited.  Unfortunately I only really understand the ASDM and ever then not to well.

These 2 firewall did have a tunnel between them at one time.  However it was deleted.

However it was not deleted completely, there are still elements of the old tunnel in both firewalls.  Becuase of this ASDM will not let me create a new tunnel as some of the IP Addresses overlap.

What components are necessary for a site to site tunnel?  All the documentation either points to using ASDM, but how to I manually add the missing pieces?

What CLI commands do I run to figure out what is missing, so that I can add them via the CLI?
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Commented:
You should start from collecting information about each side.
What information is present and what information is missing for each from the other?
The missing information could be the peer on each side, preshared key, certificate, etc..


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