The MPLS WG Archive

["Franklin Lian" <Franklin.Lian@globalone.net>]

Hello, Bala

In RFC 2547, there are three BGP extended attributes speficied:

- Site of Origin
- VPN of Origin
- Target VPN

In practice, "Site of Origin" identifies from which site the route is
originated and the "Target VPN" is the Route-Target attribute.  In
section 4.2.3 of RFC2547, the VPN of origin is an optional attribute
that is used to identify a particular set of sites which may or may
not constitute a VPN.  I found that Cisco's implementation of VPN of
Origin is the Route-Distinguisher attribute of the route, however, I 
don't think RD is exact the "VPN of Origin" specified in RFC2547.

Personally I don't think the "VPN of Origin" is so necessary and it
does not hurt to take if off.

Hoep it will help
Franklin

Bala Subrahmanyam Venkata wrote:
> 
> All-
> 
> Is there a reason why RFC 2547bis draft does not refer to the "VPN of
> Origin" attribute at all ? (I am not clear as to how this attribute is
> different from "Site of Origin" attribute as defined in RFC 2547).
> 
> TIA
> 
> /bala