Are you just getting Unicast flooding because the switch doesn't know where the destination is?
http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note0918 6a00801d0808.shtml -- http://dcp.dcptech.com > -----Original Message----- > From: [email protected] [mailto:cisco-nsp- > [email protected]] On Behalf Of Chuck Church > Sent: Friday, August 19, 2011 4:24 PM > To: NSP - Cisco > Subject: [c-nsp] ARP oddness > > Anyone, > > Researching some issues at a remote site, seeing something I > don't > think should happen. A packet capture on this remote server using > wireshark > and focusing in on ARP is seeing all the requests (as I'd expect), but > I'm > also seeing unicast replies that I shouldn't. The MAC address table on > the > switch I'm attached to shows only the MAC of this remote server on that > port. There are no SPAN sessions on the switch either. The > destination > addresses aren't multicast, they're true unicast. Yet I'm seeing all > these > unicasts that aren't my mac address. Is there some function built into > a > Cisco switch that broadcasts these to make them act like gratuitous > ARPs, or > am I really seeing something that shouldn't happen? It's on a Sup2+ > 4500, > running 12.2(25)EWA10 (I know it's ancient, vendor owns it...) > > Thanks, > > Chuck > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
