From: Joe (groupstudy@comcast.net)
Date: Mon Dec 30 2002 - 21:43:49 GMT-3
Since DLSw+ does the conversion at the ingress/egress of non-token ring
media, I'd concur with your statement, unless something happended in the
middle, but I can't think of anything like that myself. As I am writing
this I am wondering if border peers might come into play here.
What if you had the following:
Ethernet------R1------Serial------R2------Serial------R3------Ethernet
DLSw------------------------------------DLSw
DLSw between R1 and R3 would not require any special handling to do MAC
filtering and such.
But what if we had the following:
Ethernet------R1------Serial------R2------Serial------R3------Ethernet
DLSw----------------DLSw
DLSw----------------DLSw
Here we have a DLSw session between peers in group 1, R1 and R2, and
another session between peers in group 2, R2 and R3, where R2 acts as
the border peer for groups 1 and 2. What happens to the rule in this
case? Router 2 has no idea that the frames come from Ethernet, it just
sees the MAC addresses. If we needed to filter in R2, I am inclined to
think we'd need to look at the bitswapped MAC addresses.
Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Livingston
Sent: Monday, December 30, 2002 5:58 PM
To: ccielab@groupstudy.com
Subject: DLSW Bit Swapping
My understanding is that when using DLSw in a pure Ethernet (No TR)
environment you do NOT need to do any bit-swapping. Would that be a
consensus on this forum?
Thank You,
Scott
.
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