[119299] in North American Network Operators' Group
Re: Layer 2 vs. Layer 3 to TOR
daemon@ATHENA.MIT.EDU (Jonathan Lassoff)
Thu Nov 12 16:30:10 2009
From: Jonathan Lassoff <jof@thejof.com>
To: David Coulson <david@davidcoulson.net>
In-reply-to: <4AFC7917.5040002@davidcoulson.net>
Date: Thu, 12 Nov 2009 13:29:29 -0800
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Excerpts from David Coulson's message of Thu Nov 12 13:07:35 -0800 2009:
> You could route /32s within your L3 environment, or maybe even leverage
> something like VPLS - Not sure of any TOR-level switches that MPLS
> pseudowire a port into a VPLS cloud though.
I was recently looking into this (top-of-rack VPLS PE box). Doesn't seem
to be any obvious options, though the new Juniper MX80 sounds like it
can do this. It's 2 RU, and looks like it can take a DPC card or comes
in a fixed 48-port GigE variety.
I like the idea of doing IP routing to a top-of-rack or edge device, but
have found others to be skeptical.
Are there any applications that absolutely *have* to sit on the same
LAN/broadcast domain and can't be configured to use unicast or multicast
IP?
--j
