Re: OT: Bridging ADSL

Paul,
"standard" ADSL runs ATM as ... framing ? It's kind of a protocol mess,
I know.
You don't need a dialer because you do not start a session for the link,
as the other alternatives that get a PPP session, either PPP over ATM,
or PPP over Ethernet (over ATM).

-Carlos

Paul Cocker @ 11/02/2011 17:25 -0300 dixit:
> Hi Carlos,
>
> At home it's just standard ADSL, not ATM. I don't really understand why
> you don't need the dialer interface for it.
>
> Afraid the other ISP is PPPoA not PPPoE
>
> Thanks for your input,
> Paul
>
>
>
> On 11/02/2011 10:53, Carlos G Mendioroz wrote:
>> 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