Hello, we have the same issue between 2911 and 3825 with l2tpv3. Dynamic tunnel didn't become up, but use manual tunnel and it's working.i.e. R1:pseudowire-class pwclass encapsulation l2tpv3 protocol none ip local interface Loopback0!interface Gigabi...

Yes, i mean nat 0 access-list. same-security-traffic permit intra-interface present in your config?

destination network present in tunneled networks?access-lists on asa permit traffic from destination network to vpn network?traffic from destination to vpn network present int nat 0 alc?give sh running-config