I've tried 2 different DSL devices: modem/router in bridge mode, modem-only in bridge mode.
If I set the IP on vlan 2 to DHCP, I get an address and route via pppoe.
As soon as I set the IP to the IP block I was assigned, I am unable to ping/surf.
Some people suggest to set the interface to DHCP/setroute with a pppoe username of <username>@static.sbcglobal.net - tried it, no go.
What makes this strange is that I can put the DSL modem/router back to router mode, and manually assign the IP block to the AT&T device (Netopia 3310), and it works on that device - meaning I can ping the gateway and surf with a PC connected directly to the Netopia.
I *cannot* get the ASA to work with the IP block I've been assigned.
In DHCP mode, the subnet mask on the interface is /32, with a gateway in a different /8 subnet - my IP is 68.x.y.z/32 and the gateway is 65.a.b.c. I get this information from "show ip" and "show vpdn ppp".
I've also tried setting my ip to an address in the middle of the subnet block and tried the gateway on either end of the block (AT&T likes to use the high end of the block for gateway).
I've also tried a /24 mask with gateway on .1 and .254. Nothing works.
Yet, as I mentioned, the IP block works if I manually assign it on the modem/router.