Re: VPLS model for L2VPN Framework document

>
>I thought the framework model was that the PE contain a single Bridge.
>Certainly, if it contains multiple Bridges, it is impossible to run
>an MSTP instance among the Bridges. However, why multiple Bridges are
>needed in a single PE? If it is single, I think there is no problem.

With respect to IEEE, the proper model is single bridge in a PE; however, 
if Ethernet access network is not used or IEEE control protocols is not 
used in the MPLS/IP access network, then one can use multiple bridges model 
where each bridge is simple 1980-style bridge (e.g., VSI). Although the 
later model is not recommended because of its restrictions.

-Ali


>Thanks,
>
>
>Muneyoshi Suzuki
>Nippon Telegraph and Telephone Corp.