[cisco-nas] DSL info

[Aaron Leonard]

John,

I'm afraid that I can't help you too much here ... I don't
understand how a DSLAM would deliver DSL sessions to you
via a frame relay T1.  Perhaps they're showing up as SVCs or
something - so you're getting PPPoFR VCs that are being
translated by your telco to PPPoAoDSL?  I don't get it.

As far as what router would be necessary to handle a T1's worth
of FR - most any router we sell could handle that.  The big question
would be what software features you would need, and which hardware
platforms support the desired sw features.  Since I don't understand
what sw features in this proposed topology, I'm afraid I can't say
too much ... maybe you could post the telco's verbiage to comp.dcom.xdsl
and see if anyone knows anything about this.

Aaron

---

> Aaron,
> 	Hi. Thank you for the prompt response. I have contacted the telco
> again and they have assured me that this will be a T1 frame relay. The
> 7200 seems to be a bit overkill. This will be a small scale verture. We
> will be "testing the waters" so to speak. Is the 7200 still going to be
> the best recommendation?

> > Hi John,
> >
> > The typical DSL aggregation scenario involves using ATM rather
> > than Frame Relay from the DSLAM to the aggregation router.
> >
> > It would typically be up to you rather than the telco, I think, to decide
> > which encapsulation method is to be used between the CPE and
> > your aggregation router - PPPoA, PPPoE or RBE (RFC-1483 bridging.)
> >
> > Sample Configurations for Cisco 7200 Broadband Aggregation
> > http://www.cisco.com/warp/public/794/7200_bdaggreg.html
> >
> > This gives you an overview.  As far as what aggregation router
> > to use ... I suppose if your 5350s have spare CPU and memory,
> > they could be used ... assuming that their software supports
> > the DSL aggregation feature you want (I don't know offhand.)

> --
> Thank You,
> John McKinney
> WNC ONLINE

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