[c-nsp] Cisco 2950s acting as hub?

[Alex Cruz Farmer]

Dale W. Carder wrote:
> Hi Alex,
> 
> Perhaps your unconfigured 2950's are not running portfast on the edge
> ports or are otherwise generating a topology change notification every 
> time an end station connects/disconnects.
> 
> I seem to recall a bug in really old desktop switch software that tcn's
> were generated even with portfast on.
> 
> Easy way to see this would be to run "show spann vlan 'vlan' detail" on
> the 6500 and look for the # of topo changes and the last change time.
> 
> Another thing to tune would be the mac-address-table aging parameter.
> By default I believe it is absurdly low (5 min).  Change it to match
> your arp timer (which is usually a bit too high).  Try something like
> 1 hr for both.
> 

Hi guys,

Thanks for all your responses, I'll try all the suggested bits and bobs and let you
know whether it works or not! :)

Thanks,

Alex.