[c-nsp] PWE3 suggestions?

[Mike]

On 05/18/2011 03:19 PM, Łukasz Bromirski wrote:
> On 2011-05-18 22:51, Mike wrote:
>> Hi all,
>>
>> I have an adtran TA5000 and it's got a 32 port t1 card that does
>> pseudowire.
>> Adtran itself can't seem to give me any usage guidelines or examples
>> using
>> anything for pwe3 other than their own (non-desireable) mx480 product. We
>> want to have a 7200 or something else in the cisco family that can
>> take t1's
>> over pseudowire and route and such but we are having a hard time figuring
>> this out. Is there anyone who has PWE3 experience or can reccomend
>> something
>> in the cisco family we might use here? We don't need gigabits per second,
>> just something we can aggregate subscribers on pseudowire t1's.
>


As a followup, I got these responses:

> Any decent ISR will do - 2900, 3900 series is your friend coupled with
> VWIC3's. 7200 is of course an option given NPE-G1/G2 and appropriate
> PAs. Question is scale of T1 ports.
>
and

> Apparently these Cisco devices support pseudo wire:
>
> Cisco 2650XM, Cisco 2651XM, Cisco 2691, Cisco 3660 Series, Cisco 3725, and Cisco 3745 Routers
> Cisco 7200 Series Routers
> Cisco 7500 Series Routers
> Cisco AS5800 Access Servers and Cisco 10000 Series Routers


I did find some cisco documentation but it was quite sparse and did not 
discuss specfic platform support nor specfic ios images which supported 
the pseudowire commands it discussed.  I have both a 7204vxr and a 3725 
and tried these on both but the cli doesn't understand 'pseudowire' or 
any of the other related things. Searching for more documentation 'cisco 
pseudowire' or 'cisco pwe3' turns up almost nothing. I have also been to 
the cisco feature navigator and used 'pseudowire' and got some hits on 
XR software and ASR 9000 but the returned results still don't give me a 
clear indication that yes this is a supported feature and here's 
deployment / configuration examples.

	I should state that probabbly %95 of what an actual T1 interface can 
do, is uninteresting and not useful for my application. I really simply 
want to use T1 for last-mile IP connectivity to my end users, who are 
really just getting IP service. Using 't1' as opposed to 'efm/t1' 
(adtran solution) means being able to leverage the world of ebay and the 
$25 1720's with WIC-1DSU-T1 cards. The efm/t1 solution requires a cpe 
costing over $1100, destroying the concept of cost effective broadband 
to remote end users. The specfic configuration, I think, is one where 
the end user has said 1720 and t1 wic, which connects via t1 to my 
aggrgation point (an adtran ta5000, in a telco co somewhere), which then 
tunnels across my network to a router doing pwe, simply to provide ip 
routing to that end user. I don't need physical t1 ports except at the 
telco office, but it's been suggested in the docs I saw that even with 
pwe3 I still would have to have some kind of 't1' interface hardware 
somewhere in the cisco box in order to make it fly.

	I also looked around for opensource support for pwe3 and came up empty, 
which is a little suprising since this seems very useful and being able 
to load a linux box with fast cpu and gige interfaces would undoubtably 
provide at least enough platform to support maybe a few ds3's worth. But 
there doesn't seem to be anything out there either.

	Id still like to see more concrete suggestions if anyone has any ideas.

Mike-