if you're using bgp signaling for auto discovery then you need RD, if you
are using LDP, you do not

if you still dont know why you need an RD when using bgp, i suggest you read
the following RFC's



http://tools.ietf.org/html/rfc4761
http://tools.ietf.org/html/rfc4762












On Tue, Jun 17, 2008 at 8:07 AM, narasimha murthy <[EMAIL PROTECTED]>
wrote:

> Hi can any one tell me why RD is required for BGP based VPLS configaration.
> in case of L3 vpn RD is used to make customer ipv4 address globally unique
> in MPLS domain.
>   But i dont understand the usage of RD in case of VPLS.
>
> Murthy
>
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