Draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN1 BGP Extension For L3VPN PM draft-ni-l3vpn-pm-bgp-ext-00 Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies.

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draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN1 BGP Extension For L3VPN PM draft-ni-l3vpn-pm-bgp-ext-00 Hui Ni, Shunwan Zhuan, Zhenbin Li Huawei Technologies IETF 87, Berlin, Germany

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN2 Solution Suggested in [draft-dong-l3vpn-pm- framework] Basic Idea: Create a VRF-To-VRF Tunnel ( VT Tunnel ) between a pair of VRFs Carry L3VPN traffic on this P2P tunnel. 3 basic steps taken to setup VT tunnel  STEP1: Doing L3VPN membership A-D in VRF granularity through BGP protocol  STEP2: Support allocating a new L3VPN inner Label(VT Label) in a VRF-to-VRF manner through BGP protocol  STEP3: Still Use BGP VPN Labeled Route to exchange private routes, but apply VT Label to Private Routes as Inner Label to shift L3VPN forwarding model from MP2P to P2P BGP extension for step1 & 2 work is defined in this draft.

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN3 BGP Extensions: VT Sub Address Family VT is introduced by following MP-BGP Framework defined in [RFC 4760], with a SAFI to be assigned by IANA to indicated VT Sub Address Family VT NLRI is defined as below diagram and it supports multiple route types | Route Type (1 octet) | | Length (1 octet) | | Route Type Specific (Variable) | Two types of routes are defined: TYPE 1: VT VPN membership A-D Route TYPE 2: VT Labeled Route

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN4 BGP Extensions: VT VPN A-D Route VT VPN A-D route is designed to describe VRF’s route importing requirement, utilized to guide remote PE to advertise VT Labeled Route in a DoD-Like manner VT VPN A-D Route is defined as: | RD (8 octets) | | Local Router's IP Address |  RD value is filled with local VRF’s RD value  Local Router’s IP address is advertising PE’s loopback IP address for BGP session This route MUST carry Local VRF’s IRTs as Ext-Community attribute in BGP Update message

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN5 BGP Extensions: VT Labeled Route VT Labeled Route is designed to advertise VT Label in a VRF-to-VRF manner | Local VRF’s RD (8 octets) | | Local Router's IP Address | | Remote VRF's RD (8 octets) | | Remote Router's IP Address | | Label (3 octets) |  Local VRF’s RD together with Local Router’s IP Address identifies Local VRF  Remote VRF’s RD together with Remote Router’s IP Address identifies Remote VRF  Label field is one or more labels allocated for the VT tunnel between Local VRF & Remote VRF

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN6 Best Route Selection: VT A-D/Labeled Route VT A-D Route MUST follow Best Route Selection defined in [RFC 4271 ] The Best Route result is utilized to guide VT Labeled Route’s advertisement: VT Labeled Route MUST be advertised to the BGP Peer from which the Best VT A-D route is received. VT Labeled Route SHOULD follow Best Route Selection defined in [RFC 4271] as an implementation option.

draft-ni-l3vpn-pm-bgp-ext-00IETF 87 L3VPN7 Next Steps Solicit more comments & feedbacks Revise the draft