[c-nsp] EoMPLS restrictions

[David Hughes]

On 25/02/2009, at 10:01 PM, <nasir.shaikh at bt.com>  
<nasir.shaikh at bt.com> wrote:

> Hi,
> Can someone shed some light on the following limitation of EoMPLS?
> Layer 2 connection restrictions:
> - You cannot have a direct Layer 2 connection between provider-edge  
> routers with EoMPLS
> Why is this?
> I have a MAN running MPLS where my PE are directly connected. I need  
> to do extend my datacenter LANs from location A to location B. I was  
> thinking of using EoMPLS but this limitation is bothering me because  
> I don't understand this limitation.
> Anyone care to explain?

Can't see a problem with this and have implemented basically exactly  
what you have outlined.  We are running 2 pairs of 6500s providing  
redundant 10GigE paths between a couple of datacentres.  They act as  
PEs and provide port based EoMPLS xconnects to other 6500s at the  
DC's.  Those 6500s run dot1q over an etherchannel constructed from a  
bundle of these EoMPLS vc's.  Works very well.  Only issue is layer 2  
fault identification (see recent thread on Fast UDLD Timers for the  
ugly details).


David
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