On Sat, 25 Jan 2003, Neil J. McRae wrote:
Anybody here on list using Extreme products (Summit/Alpine/Blackdiamond)? They sure don't like this traffic one bit. It causes them to not only drop traffic, but spew out every available error message under the sun...
Extreme are apparently assembling an "advisory TAC" on this, from our point of view, since we use the devices to do l3 aggregation (for colo and such) we've used an ACL to try and combat the offending traffic, but its not doing much good.....
Do you have MCAST enabled on these switches? I'd guess this is what is causing issues on the extreme boxes.
I think the architecture is flow-based, ie, the first packet of each flow hits the CPU. This is probably causing the high CPU utilization. The flow would still hit the CPU even with a ACL and then probably be written to the ASIC with a null location. andy -- PGP Key Available at http://www.tigerteam.net/andy/pgp