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 10.10.3.0 and the network at the pix end is 10.10.10.0.
from what i can see the tunnel comes up ok yet when i try to ping from the pix to 10.10.3.1 i see packets encapsulating but not decapsulating and doing a sh access-list shows the hitcount rising.
strangely enough if i change the 10.10.10.0 network to something entirely different like 192.168.101.0 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