[c-nsp] Unicast traffic being sent to every port? Aging issue?

[Gert Doering]

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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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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