Re: (ASCEND) 7.10.6 software for the DSL MAX 20

[Tony Ray <tony@turbonet.com>]

Matt,

Perhaps you know or can find out for me the answers to these questions.

Currently I'm providing DSL (over Frame Relay from the DSLAM) and Frame
Relay using Cisco equipment.  The feature Cisco has that I need and use
is Integrated Bridging and Routing, irb.  I need to be able to bridge
several DSL and Frame Relay pvc's together for telecommuting to offices
and interconnecting offices between communities for customers.  I also
need to place a routable interface on these bridge groups giving each
their own subnet and access to the Internet.  Cisco's routers do this
quite well, but I find I am limited to 120 dlci's per T-1 interface when
the T-1's could easily handle three times their current traffic.  I'm
also limited to 480 subinterfaces using irb.

I have no control over customer premise equipment nor do I want to have
it.

I've read some of the documentation for the DSL Terminator 100 and,
quite frankly, it doesn't appear to be able to do irb (but it may just
be the way the documentation is written and its use of "Ascendese" when
I speak "Ciscoese").  Under no circumstances do I want the ethernet port
to be part of any bridge (which is what is done in the only example
Ascend gives) - just a purely routed interface.  The Ascend
documentation makes it sound as if separate "bridge groups" are not
possible except between interfaces without it being clear what
constitutes an interface.

In a Cisco router, every dlci can be given it's own "interface" for
routing purposes by creating serial subinterfaces, assigning each one
its own dlci, assigning a (separate) bridge group to each serial
subinterface (or group of subinterfaces) and placing a bridge virtual
interface on the bridge group.  Considering the chain of things tied
together to make this work in a Cisco router, I wouldn't be surprised if
something like this isn't possible in the Ascend box but that is just
isn't clear how to go about it from the documentation.

Also, while the Terminator 100 appears to be able to handle 1000 dlci's,
there is no mention of whether there are limits on the number of dlci's
per T-1 interface.  I realize the size of the LMI packets places such a
limit (but can't recall right off what that limit is).  Also, irb places
a heavy load on the Cisco's processor so whether or not the Terminator
100 can handle 1000 irb's (or equivalent profiles) is an equally serious
question.

Thanks,

--Tony
++ Ascend Users Mailing List ++
To unsubscribe:	send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd:	<http://www.nealis.net/ascend/faq>