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Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies IETF 87, Berlin, Germany

BGP Extensions for Setup Service-Driven Co-Routed LSP in L3VPN draft-ni-l3vpn-bgp-ext-sd-co-lsp-00. Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies IETF 87, Berlin, Germany. Solution Suggested in [draft- li - mpls - serv -driven-co- lsp - fmwk ]. For L3VPN Scenario:

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Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies IETF 87, Berlin, Germany

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  1. BGP Extensions for Setup Service-Driven Co-Routed LSP in L3VPNdraft-ni-l3vpn-bgp-ext-sd-co-lsp-00 Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies IETF 87, Berlin, Germany

  2. Solution Suggested in [draft-li-mpls-serv-driven-co-lsp-fmwk] • For L3VPN Scenario: • Co-routed RSVP-LSPs between a pair of VRFs could be setup automatically driven by L3VPN Service • It contains 4 steps: • STEP1: Doing L3VPN Service A-D by using VT VPN A-D Route in VRF granularity • STEP2: One side PE(Active PE) setup LSP first and advertise Tunnel Type/ID to other side PE(Passive PE) • STEP3: Passive PE setup reverse LSP based on forward LSP’s Path info and advertise the Tunnel Type/ID back to Active PE • STEP4: Both PEs bind the tunnels together for above L3VPN service. • A new BGP VT Type Route is defined to support above Step2&3 works.

  3. BGP Extensions: VT Tunnel-ID Signal Route(1) • VT Tunnel-ID Signal Route is defined as: • +----------------------------------------------+ • | Local VRF's RD (8 octets) | • +----------------------------------------------+ • | Local Router's IP Address | • +----------------------------------------------+ • | Remote VRF's RD (8 octets) | • +----------------------------------------------+ • | Remote Router's IP Address | • +----------------------------------------------+ • | Tunnel Type (1 octet) | • +----------------------------------------------+ • | Flags (1 octet) | • +----------------------------------------------+ • | Tunnel ID (variable) | • +----------------------------------------------+ • Local VRF’s RD together with Local Router’s IP Address identifies a Local VRF • Remote VRF’s RD together with Remote Router’s IP Address identifies a Remote VRF

  4. BGP Extensions: VT Tunnel-ID Signal Route(2) • VT Tunnel-ID Signal Route(Tunnel Info Part) • +----------------------------------------------+ • | Tunnel Type (1 octet) | • +----------------------------------------------+ • | Flags (1 octet) | • +----------------------------------------------+ • | Tunnel ID (variable) | • +----------------------------------------------+ • Tunnel Type: 2 values are defined: • 0: RESERVED • 1: RSVP-TE Tunnel • other value: to be defined later if need • Flags Field: Lowest 1 Bit is used/defined as R bit (other 7 bits are RESERVED): • 1: Active – Tunnel info is advertised from Active PE to Passive PE • 0: Passive – Tunnel info is advertised from Passive PE to Active PE • Tunnel ID: • Tunnel ID format is defined specific according to Tunnel Type, • For RSVP-TE tunnel, it has same format of SESSION Object defined in RSVP-TE [RFC 3209]

  5. Active/Passive PE Role Auto Selection • Active/Passive PE role COULD be determined by 2 manners: • Manually Configured • Auto Selected through BGP protocol • InVTCapability Negotiation, peer’s Router IDs are compared as unsigned integer, peer with Larger value is selected as Active PE.

  6. Next Steps • Solicit more comments & feedbacks • Revise the draft

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