VPN with similar networks at either end - not working.

Unanswered Question
Oct 13th, 2008

hi, i wonder if this will ring any bells to anyone.

i'm trying to set up a site to site vpn between a pix 501 and an asa 5505. the network on the asa side is and the network at the pix end is

from what i can see the tunnel comes up ok yet when i try to ping from the pix to i see packets encapsulating but not decapsulating and doing a sh access-list shows the hitcount rising.

strangely enough if i change the network to something entirely different like and configure it up that way it all works perfectly.

unfortunately the networks must be what they are so i can't change that.

been beating my head against this for 5 days now and at my wits end so any light anybody can shed on this will be most gratefully received!

many thanks in advance... dave

I have this problem too.
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