Re: [Netdisco] ND2 strange node behaviour

[Eric M. <er...@je...>]

It is simply a matter of how often a device is communicating on the 
network.

When the ageing timer drops to 15 seconds upon receipt of a TCN, the MAC 
will disappear if the device does not send a frame within the 15 second 
window.  The end device must send a frame to populate the forwarding 
table, if the switch doesn't have a device's MAC within its forwarding 
table it acts like a hub and forwards the frame out all of the other 
ports, so communications still work just not efficiently.

On 2014-06-01 13:40, Nikolaos Milas wrote:
> On 1/6/2014 1:20 μμ, Nikolaos Milas wrote:
> 
>> When I changed it to trunk, everything started running
>> smoothly in this network branch (I re-enabled STP on csw-astr0).
> 
> Yet, I still wonder why, when the TCN flooding situation was happening,
> the "MAC disappearing" issue seemed to occur only with particular
> dynamic MAC addresses and not with all (or more) of them...
> 
> Could you, Eric (you seem most knowledgeable on the subject), or anyone
> else, attempt an explanation, please?
> 
> Thanks,
> Nick
> 
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