Re: OT: Bridging ADSL

Paul,
at home it seems you are getting IP over ATM.
But now, with the dialer interface, you might be using PPPoA or PPPoE.
In the first case, I guess you are OOL.
If PPPoE, you could bridge at the CPE and terminate the pppoe link
directly at the ASA.

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080ab7ce9.shtml

-Carlos

Paul Cocker @ 10/02/2011 15:22 -0300 dixit:
> Hi,
>
> Sort of off topic, but interesting to me :-) I wonder if anyone has
> any experience of this.
>
> At home i like to run an ASA with the real outside address, so I use
> this setup to bridge the ATM interface to the ethernet. The ASA then
> just picks up an IP with DHCP. I also get a 2nd IP off the BVI
> interface. My ISP doesn't require PPP.
>
> ----------------------------------------------
> bridge irb
> bridge 5 protocol ieee
> bridge 5 route ip
>
> !
> interface ATM0
> no ip address
> no atm ilmi-keepalive
> !
> interface ATM0.1 point-to-point
> ip virtual-reassembly in
> atm route-bridged ip
> bridge-group 5
> pvc 0/101
> encapsulation aal5snap
>
> interface FastEthernet8
> description link to ASA outside - bridging ATM
> switchport access vlan 5
>
> interface Vlan5
> description bridge group for internet
> no ip address
> bridge-group 5
>
> interface BVI5
> ip address dhcp
> ip flow ingress
> ip nat outside
> ip virtual-reassembly in
>
> ----------------------------------------------
>
>
> That all seems to work ok, hoever I've tried to do it with another ISP
> that requires a dialer interface for the ADSL, in line with this doc
> from cisco which is about bridging ISDN...
>
> http://www.cisco.com/en/US/tech/tk801/tk379/technologies_configuration_example09186a008009457f.shtml
>
>
> Now. I guess dhcp isn't going to work on the PC/ASA attached to the
> fastethernet interface as DHCP ain't the same as PPP IP negotiate.
>
> Anyone see a way to make this work? Maybe if the ISP provided a static IP?
>
> A bit weird I know, and more for fun than anything else. Any ideas?
>
> Paul
>
>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net