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Inter-AS Option B between NVO3 and MPLS EVPN network draft-hao-l2vpn-inter-nvo3-evpn-00

Inter-AS Option B between NVO3 and MPLS EVPN network draft-hao-l2vpn-inter-nvo3-evpn-00. Weiguo Hao ( Huawei ) Liang Xia( Huawei ) Shunwan Zhuang ( Huawei ) Vic Liu(China Mobile). haoweiguo@huawei.com frank.xialiang@huawei.com zhuangshunwan@huawei.com liuzhiheng@chinamobile.com.

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Inter-AS Option B between NVO3 and MPLS EVPN network draft-hao-l2vpn-inter-nvo3-evpn-00

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  1. Inter-AS Option B between NVO3 and MPLS EVPN networkdraft-hao-l2vpn-inter-nvo3-evpn-00 WeiguoHao(Huawei) Liang Xia(Huawei) ShunwanZhuang(Huawei) Vic Liu(China Mobile) haoweiguo@huawei.com frank.xialiang@huawei.com zhuangshunwan@huawei.com liuzhiheng@chinamobile.com July, 2014 Toronto Canada Inter-as NVO3 and EVPN

  2. Scenario CE1 CE2 CE3 CE4 PE1 PE2 MPLS EVPN Network Inter-as connection should be setup between ASBRs. Two solutions: Option-A Option-B. ASBR2 WAN Network AS2 AS1 Data center Network ASBR1 NVO3 Network NVE1 NVE2 Green VPN Purple VPN TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  3. Option-A solution CE1 CE2 CE3 CE4 • Option-A inter-as solution issues: • Up to 16M sub-interfaces between ASBRs. • Up to 16M EVPN instances on ASBRs. • Several million MAC routing entries on ASBRs. PE1 PE2 MPLS EVPN Network ASBR2 Sub-interfaces are used for VPN traffic separation. ASBR1 NVO3 Network NVE1 NVE2 TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  4. Option-B solution characteristic • No MAC-VRF exists on ASBR • No sub-interface associated with each VRF exists between ASBRs • Only VN ID and MPLS Label switching on ASBR Inter-as NVO3 and EVPN

  5. Option-B solution： Ethernet Tag ID conversion on ASBR CE1 CE2 CE3 CE4 VLAN 20 VLAN 10 PE1 PE2 MPLS EVPN Network VLAN 10 in EVPN network and VN 100 in NVO3 network belong to same broadcast domain, VLAN 20 and VN 200 belong to same broadcast domain. NVO3 network uses VN ID as Ethernet Tag ID, EVPN network uses VLAN ID as Ethernet Tag ID. ASBR2 Ethernet Tag ID should converted to local value on ASBR ASBR1 NVO3 Network NVE1 NVE2 VN ID 100 TS1 TS2 TS3 TS4 VN ID 200 Inter-as NVO3 and EVPN

  6. Option-B solution： Ethernet Auto-Discovery Route process CE1 CE2 CE3 CE4 PE1 PE2 If multiple ESIs share same set of NVEs, these ESIs can share MPLS Label on ASBR1. MPLS EVPN Network MPLS Label and <remote NVE(s), VN ID> correspondence is used to generate incoming forwarding table on ASBR1. ASBR2 ESI =0 : MPLS label is allocated per NVE per VN. ESI !=0: MPLS label is allocated per ESI per VN. ASBR1 NVO3 Network Ethernet A-D router per ES or per EVI/VN NVE1 NVE2 TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  7. Option-B solution： Ethernet Segment Route process CE1 CE2 CE3 CE4 PE1 PE2 MPLS EVPN Network ASBR2 The route is restricted to local AS, it doesn’t need to be transmitted to peer AS. ASBR1 NVO3 Network Ethernet Segment Route for DF election NVE1 NVE2 TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  8. Option-B solution：Inclusive Multicast Ethernet Tag Route CE1 CE2 CE3 CE4 PE1 PE2 MPLS EVPN Network The re-advertised Inclusive Multicast Ethernet Tag Route on ASBR is same with original ones, except for Ethernet Tag ID and the PMSI Tunnel attribute. • LDP/RSVP-TE P2P LSP • RSVP-TE P2MP LSP • mLDP P2MP LSP ASBR2 Stitching segmented P-multicast tree on ASBR ASBR1 NVO3 Network • PIM-SSM Tree • PIM-SM Tree • BIDIR-PIM Tree • Ingress Replication NVE1 NVE2 TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  9. Option-B solution：MAC/IP advertisement route(1) CE1 CE2 CE3 CE4 PE1 PE2 MPLS EVPN Network ASBR2 packet ASBR1 NVO3 Network Incoming forwarding table NVE1 NVE2 VN ID 100 TS1 TS2 TS3 TS4 VN ID 200 Inter-as NVO3 and EVPN

  10. Option-B solution：MAC/IP advertisement route(2) CE1 CE2 CE3 CE4 PE1 PE2 MPLS EVPN Network MPLS VPN Label 3000 and 4000 for CE1 and CE4 MAC ASBR2 packet Outgoing forwarding table New allocated VN ID 10000 for VPN Label 3000, VN ID 20000 for VPN Label 4000 ASBR1 NVO3 Network VN ID 100 NVE1 NVE2 VN ID 200 TS1 TS2 TS3 TS4 Inter-as NVO3 and EVPN

  11. Next Steps • Discuss the modes of VN ID allocations. • P-Multicast tree stitching solution on ASBR. • NVO3 and PBB MPLS EVPN interconnection • Solicit other comments and suggestions. Inter-as NVO3 and EVPN

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