[c-nsp] hierarchical MPLS VPN

[Ibrahim Abo Zaid]

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


in Juniper , this feature is supported by *mpls topology-driven-lsp *command
, what about Cisco IOS ?
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best regards
--Ibrahim Abo Zaid