[88972] in North American Network Operators' Group
Re: Transit LAN vs. Individual LANs
daemon@ATHENA.MIT.EDU (Scott Weeks)
Mon Feb 27 13:48:08 2006
From: "Scott Weeks" <surfer@mauigateway.com>
Reply-To: surfer@mauigateway.com
To: nanog@merit.edu
Date: Mon, 27 Feb 2006 08:47:32 -1000
Errors-To: owner-nanog@merit.edu
> --On February 25, 2006 11:04:12 AM -0500 "Patrick W.
> Gilmore" <patrick@ianai.net> wrote:
> > On Feb 24, 2006, at 9:03 PM, Scott Weeks wrote:
> >
> >> I have 2 core routers (CR) and 3 access routers (AR)
> >> currently connected point-to-point where each AR
> connects to >> each CR for a total of 6 ckts. Now someone
> has decided to >> connect them with Gig-E. I was
> wondering about the benefits >> or disadvantages of
> keeping the ckts each in their own >> individual LANs or
> tying them all into one VLAN for a >> "Transit LAN" as
> those folks that decided on going to Gig-E >> aren't doing
> any logical network architecting (is that a >> real
> word?).
>
> In my experience either solution has tradeoffs and the
> correct one depends greatly on your traffic patterns.
> Having said that, what I find causes most of the problems
> in either solution is when the Layer 3 topology starts to
> diverge from the Layer 2 topology.
Hi Guys,
Apologies for the late response, I had to do an unexpected
outer island trip and got back late last night.
I am just using OSPF area zero between the CRs and ARs. So,
it's full mesh over a LAN if I do the "transit LAN". Is
that what you're referring to? Could you elaborate?
Thanks,
scott
