Transit LAN vs. Individual LANs

Scott Weeks surfer at
Mon Feb 27 19:10:24 UTC 2006

----- Original Message Follows -----
From: "Stephen Sprunk" <stephen at>
To: "Patrick W. Gilmore" <patrick at>
Cc: "North American Noise and Off-topic Gripes"
<nanog at>
Subject: Re: Transit LAN vs. Individual LANs
Date: Sat, 25 Feb 2006 13:56:37 -0600

> Thus spake "Patrick W. Gilmore" <patrick at>
> > 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?). >
> > Personally, I like the to KISS, so one big 'transit
> LAN'.
> ITYM two big transit LANs -- one must be prepared for a
> switch to fail.

These're going to be router-to-router connections (each AR
is connected to both CRs) and I had thought about tying them
all into one VLAN vs. PTP Gig-E.  I was just trying to find
out the operational benefits of either design.


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