[164204] in North American Network Operators' Group
Re: Service provider T1/PPP question
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Jun 28 22:57:21 2013
From: Leo Bicknell <bicknell@ufp.org>
In-Reply-To: <51CE29AA.6040908@tiedyenetworks.com>
Date: Fri, 28 Jun 2013 21:56:41 -0500
To: Mike <mike-nanog@tiedyenetworks.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Jun 28, 2013, at 7:26 PM, Mike <mike-nanog@tiedyenetworks.com> wrote:
> I am a clec with colocated facilities, and my targets are rural =
unserved areas where none of the factors above are considerations. I =
just want to connect with anyone who's done this and has a qualified =
technical opinion on optimal deployment strategies; the business =
considerations are already done.
I find this fascinating, but here's the "scoop".
When T1's were the bee's knees (why is that a saying, anyway?) they were =
sold to what today we would call a "business" customer. The concept of =
residential users as we know them know didn't really exist during T1's =
heyday. Also during this time period MLPPP for "high speed" (yes, T1's =
qualified" wasn't really a thing, rather external multiplexers and HSSI =
(remember those fun cables?) into a DS3 interface were a thing. =
Remember providers that did Frame Relay over NxT1 just so they could mux =
the multiple customers on to DS-3/OC-3 into routers? Fun times...not. =
Anyway, the customer would have a router, like a real router, well, a =
25xx anyway, and know how to configure it.
That doesn't seem to be the world you're describing though, which is why =
I think you're getting crickets on the mailing list.
Here's my $0.02, this is going to work best if you go somewhat old =
school in the config. HDLC or PPP over a single T1 to any equipment =
that supports either should more or less work just fine. Static =
assignment will work just fine, PPP learned assignments should work more =
or less just fine. Any of the things that can channelize =
DS-3/OC-3/OC-12/OC-48 down to T1 should work just dandy, it's all a =
matter of how many you have and your particular economics. Bonded T1's =
is where it gets interesting. MLPPP should be possible with modern =
hardware, but honestly it got a workout on devices that did things like =
ISDN, not T1's. Still, if you choose carefully I don't see any reason =
why MLPPP shouldn't be reliable and work just fine in today's world.
If you're willing to do without modern features, you should be able to =
pick up a ton of gear that does all this for dirt cheap. A 7513 with =
channelized DS-3 cards is still quite spiffy for terminating static =
routed T1's for instance, and people may even pay you take them at this =
point. :) The CPE will be more interesting, there are several vendors =
that still make CPE with T1 interfaces, but that's much more rare.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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