Hi, On Wed, Apr 21, 2010 at 10:05:29AM -0400, Chris Woodfield wrote: > However, while researching the issue I found this paragraph in Cisco's docs: > > "Note: In MSFC IOS, there is an optimization that will trigger > VLAN interfaces to repopulate their ARP tables when there is a TCN > in the respective VLAN. This limits flooding in case of TCNs, as > there will be an ARP broadcast and the host MAC address will be > relearned as the hosts reply to ARP."
"if there is a TCN".
TCN = Topology Change Notice, so unless a port is causing a spanning-tree
event, there won't be any TCNs -> no rebroadcasting.
You don't want gratuitous TCNs :-)
gert
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