[cisco-voip] Loop between 7940 and CiscoExpress 500

[Robert Singleton]

On Mon, 2006-12-04 at 11:19 +0100, Vincent De Keyzer wrote:
> Hello,
> 
>  
> 
> we had an outage on the whole office LAN this afternoon because a
> user, for some reason, created a loop between the two Ethernet ports
> of his 7940 and two ports of a Cisco Express she is connected to.

What kind of loop condition did the user create?