[c-nsp] 2960 not switching packets (hub-like behavior)

[David Sinn]

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Have you looked at the mac-address table on the switch and confirmed  
that it is learning the right port the machine should be out?  Unicast  
traffic will flood to all ports on a VLAN when the switch does not  
know which specific port the traffic is out of.  Also if any of your  
clients are running Windows NLB, this would be an expected behavior  
since NLB doesn't want the switch to learn where the shared MAC  
address is.

David

On Jan 17, 2008, at 8:10 AM, Neils Christoffersen wrote:

> I have a WS-C2960-48TT-L running c2960-lanbasek9-mz.122-25.SEE4
>
> Sniffing traffic on a connected workstation, I can see unicast traffic
> destined for other systems connected to the switch. I know this  
> isn't normal
> behavior but I have been unable to diagnose the problem. Reloading  
> did not
> resolve it.
>
> This is a very simple configuration (single switch behind a  
> firewall, no
> vlans) and the network is not highly utilized.
>
> Suggestions?
>
>
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