[c-nsp] cisco ASA using many time the same MAC and HP switches

[Matt Buford]

> If the QinQ service is point2point, then i guess the service provider can 
> disable mac-address learning in order to avoid this situation.

I suggested this idea to my metro-Ethernet QinQ based provider, and they 
replied back pointing out that although the circuit appears point to point 
from my customer view, it is actually a VLAN that has numerous redundant 
paths within their network.  With mac learning turned off, my traffic would 
have flooded out across all possible redundant paths.  It would have worked, 
but it is terribly inefficient for them.