Requirements for supporting Customer RSVP and RSVP-TE over a BGP/MPLS IP-VPN draft-ietf-l3vpn-e2e-rsvp-te-reqts-01.txt Kenji Kumaki KDDI R&D Labs, Editor Raymond Zhang BT Yuji Kamite NTT Communications July 2008 72th IETF@Dublin

Major Changes from -00 Clarified problem statement in Section 3 Last IETF, Yakov asked a question about the scalability of C-TE LSPs Added application scenarios for RSVP-TE over Non-TE LSP in section 5.6 Added specific requirements for admission control support for C-TE LSPs in LDP-based core networks in section 6.6 July 2008 72th IETF@Dublin

Problem Statement C-TE LSP model (data packets among CEs are forwarded by "labeled IP packets ") If service providers offer a C-TE LSP from CE to CE over BGP/MPLS VPNs, they require that a MPLS TE LSP from a local CE to a remote CE be established. However, if a C-TE LSP signaling is to send within VPN, the service provider network will face scalability issues. A C-TE LSP can be aggregated by a P-TE LSP at PE. (i.e. hierarchical LSPs) In this case, only PEs maintain state about customer RSVP sessions. A C-TE LSP can not be aggregated by a P-TE LSP at PE depending on some policies. (i.e. continuous LSPs) In this case, both Ps and PEs maintain state about customer RSVP sessions. A C-TE LSP can be aggregated by non-TE LSP (i.e. LDP). In this case, only PEs maintain state about customer RSVP sessions. Note that there is always enough bandwidth available in service provider core network. July 2008 72th IETF@Dublin

RSVP-TE over Non-TE LSP C-TE LSPs non-TE LSPs (LDP) Vrf instances CE PE C C CE PE P P CE CE PE PE Customer’s or another SP’s network Customer’s or another SP’s network Service Provider’s network July 2008 72th IETF@Dublin

Specific Requirements Admission Control Support for C-TE LSPs in LDP-based Core Networks PEs MUST have a configurable limit on the maximum amount of bandwidth that can be reserved by C-TE LSPs per a vrf instance (i.e. per a customer). Also, a PE SHOULD have a configurable limit on the total amount of bandwidth that can be reserved by C-TE LSPs between PEs. PE PE C-TE LSPs PE vrfs C-TE LSPs C-TE LSPs vrfs ・・・ vrf PE C-TE LSPs Limit on the total amount of bandwidth Limit on the maximum amount of bandwidth vrfs July 2008 72th IETF@Dublin

Next Steps Will add application scenarios based on comments Stitching LSPs CE-PE: C-TE LSPs PE-PE: non-TE LSPs (LDP) PE-CE: C-TE LSPs July 2008 72th IETF@Dublin