From: Matt Bentley (mattdbentley@gmail.com)
Date: Wed Mar 25 2009 - 16:39:06 ART
Hi GS:
Quick question for you all. We are seeing some interesting behavior
regarding proxy-arp and multipoint VPLS. We have many customers we provide
VPLS services to.
Our Access Rings are L2 circuits provided by a variety of carriers
terminated by either Nortel/Tasman or RAD pairs on either end
Our distribution rings are Extreme Switches
Our core consists of Junipers
For multipoint VPLS, we are seeing some occasions where one CE will go down,
and the other CE devices in that VPLS will proxy for the switch that has
gone down. As soon as our Junipers see that a MAC is being answered for out
of two separate ports, they generate duplicate MAC errors
-I would think this is expected behavior for Junipers??
How are proxy-arp requests different at the structural level from normal ARP
requests? If there were some flag we could filter proxy-arps with at our
edge for, it would prevent this problem.
Aside from having customers disable proxy-arp, can anyone think of a viable
workaround?
Thanks,
Blogs and organic groups at http://www.ccie.net
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