[c-nsp] hierarchical MPLS VPN

[Oliver Boehmer (oboehmer)]

Ibrahim Abo Zaid <> wrote:
> Hi All
> 
> 
> i have a small question about the set up of hierarchical MPLS VPN
> (carrier-of-carriers VPN) , the customer carrier will establish
> MP-iBGP sessions between its PEs directly to exchange VPNv4 routes
> and all LDP or BGP between customer carrier CE and backbone provider
> PE to exchange IPv4 routes and labels
> 
> my question is , i believe there will be some command needed at
> backbone provide PE to enable carrier-of-carriers support and allow
> PE to tag incoming labeled packets with double-label based on 2
> lookups , lookup for incoming label and lookup for NH network

well, there is no specific "enable CsC" command, it's "only" the
presence of LDP or eBGP+label on the PE-CE VRF interface which tells the
PE to populate the LFIB and to label-switch packets..

	oli