John,
you might find this DSL technology tech tips page
useful.
http://www.cisco.com/warp/public/794/index.shtml
-------------------------------------------
--- John Neiberger <[EMAIL PROTECTED]>
wrote:
> Here's the situation: we have a branch with a 2620
> router and a T-1
> frame relay circuit. As a backup, we have added a
> RADSL line and we
> want to put a 675 or 678 router at the branch. The
> 675 will be
> connected to a switch that is connected to the 2620,
> and the 675 will be
> in its own VLAN.
>
> The DSL circuits (there are actually over 30) are
> muxed to an ATM T-1
> connecting to an ATM port adapter on a 7513 here at
> our headquarters. I
> thought I understood how to configure this until I
> actually started to
> do it. :-)
>
> I was expecting to use point-to-point interfaces
> (just like our F/R
> network) and aal5snap encapsulation. However, it
> appears that the 675
> can't do that or I just can't figure out how to do
> it. I can't even
> figure out how to set the IP address of the WAN
> interface on the 675. I
> *did* see how to set the ppp ipcp address for the
> WAN interface, but I'm
> assuming that means I have to use PPPoA. If that's
> the case, how in the
> heck do I configure the 7513 ATM interface to handle
> up to 50
> point-to-point subinterfaces using PPPoA? For
> encapsulation, do I use
> aal5mux or aal5ciscoppp? What are the differences?
>
> I've been searching CCO for hours and I haven't
> found much that is very
> helpful so far. Every configuration example assumes
> a different
> situation and topology than ours.
>
> To make matters worse, we are using VLSM and wanted
> to run RIP v2 on
> the 675. However, it sounds like RIP v2 is quite
> broken and we'd be
> forced to use RIP v1. That's bad news. Am I
> screwed? <g>
>
> Is there another router that would be better for
> this than the 675? I
> looked at the 827 and it seems to be exactly what we
> want except for one
> thing: Qwest is using CAP on these lines and the
> 827 does DMT only.
> Arg.... I'm trying to contact some technical people
> there but so far I
> haven't had much luck.
>
> Do any of you have any experience with this sort of
> thing?
>
> As usual, many thanks!
>
> John
>
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