[c-nsp] 2970 turns into a hub for a few moments

[Gert Doering]

Hi,

On Tue, Jan 02, 2007 at 06:12:35PM +0100, Vincent De Keyzer wrote:
> If I follow your idea, I have to conclude that the Packet Filters are either
> causing more instability, or increasing the impact of previously unnoticed
> instability (because the occurrences of the problems are *very well*
> correlated with the PFs being turned on).

Hmmm, that's confusing.

Topology-Changes should only happen if a port has a link change (down/up),
or if something funny is happening to spanning tree packets.

Are these packet filters operating in "transparent" (layer 2) mode, and
maybe doing funny things to your STP packets, so that the switches assume
topology changes?

> I am planning to bring the switch ports of the PFs back on with
> "spanning-tree portfast trunk", and, if that does not fix the problem, trace
> the TC source immediately when problem occurs.

You *should* see interface up/down events when you see a burst of TC
notifications.  Otherwise this is really unusual.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
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