[160240] in North American Network Operators' Group
Re: Muni fiber: L1 or L2?
daemon@ATHENA.MIT.EDU (Jay Ashworth)
Sat Feb 2 20:16:57 2013
Date: Sat, 2 Feb 2013 20:16:41 -0500 (EST)
From: Jay Ashworth <jra@baylink.com>
To: NANOG <nanog@nanog.org>
In-Reply-To: <CAMrdfRzkpULVpRiGVruk=ykZj6mQr-WZgqebYo3TssYGTaceXA@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
----- Original Message -----
> From: "Scott Helms" <khelms@zcorum.com>
> Owen
> I think the confusion I have is that you seem to want to create solutions
> for problems that have already been solved. There is no cost effective
> method of sharing a network at layer 1 since DWDM is expensive and requires
> compatible gear on both sides and no one has enough fiber (nor is cheap
> enough in brand new builds) to simply home run every home and maintain
> that.
That's my fundamental design assumption, and you're the first person to
throw a flag on it. I'm hearing $700 per passing and $600 per sub; those
seem sustainable numbers for a 30 year service life amortization.
I'm not yet 100% clear if that's layer 1 only or layer 2 agg as well.
[ And note that for me, it's practical; most everyone else is merely
along for the ride. ]
> ISPs that would want to use the shared network in general (>95%
> in my experience) don't want to maintain the access gear and since there
> is no clear way to delineate responsibilities when there is an issue its
> hard.
You're talking about what I'm calling L2 clients. If layer 2 falls over
it's my fault, and believe me, I'll know about it.
> The long and short of it is lots of people have tried to L1 sharing
> and its
> not economical and nothing I've seen here or elsewhere changes that.
You just changed gears again, no?
I'm not trying to share L1 *drops*. I'm trying to make it possible
to share *the entire L1 deployment between providers*, a drop at a time.
> The thing you have to remember is that muni networks have to be cost
> effective
> and that's not just the capital costs. The operational cost in the long
> term is much greater than the cost of initial gear and fiber install.
Depends on what you're trying to do. But yes, I do know the difference
between CAPEX and OPEX.
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra@baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA #natog +1 727 647 1274
