[c-nsp] Shared vs Independent VLAN learning with Q-in-Q

[Benjamin Lovell]

As far as I know there is no way to get this to happen. The bridging decision will be only on the outer Q tag. The inner tag is not considered as part of the MAC lookup. 

This why when you get two QinQ tunnels from an ISP they need to be sure they are carried through their network in different vlans, else you can see mac flapping. 

-Ben

On Jun 16, 2010, at 3:47 PM, Peter Rathlev wrote:

> On Tue, 2010-06-15 at 16:19 -0700, Derick Winkworth wrote:
>> Does anyone know if there are any Cisco platforms that support IVL
>> with Q-in-Q so the mac lookup is a 72-bit field essentially (both
>> VLANs and MAC address).
> 
> All Catalyst switches have per-VLAN FIBs, if that's what you're asking.
> Aren't all switches like that these days?
> 
> -- 
> Peter
> 
> 
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