Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 1 79th IETF - Beijing VPLS PE Model with E-Tree Support Yuanlong Jiang Lucy Yong Manuel Paul Frederic Jounay draft-jiang-l2vpn-vpls-etree-pe-02.txt

2 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Backgrounds E-Tree Requirements in multiple SDOs Service Definition: MEF 6.1, MEF 10.2 Mobile backhaul: MEF 22 Broadband Network Architecture: BBF WT-145 MPLS in Carrier Ethernet: BBF WT-224 Lack of E-Tree support in VPLS standard Non-standard mechanism for single root topology Single VSI + extended split horizon mechanism No VPLS support for multi-roots topology Multiple nodes with root & leaf attached in a single domain Multiple roots and leaves located diversely across multiple domains

3 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Highlights of the draft Using VLANs to solve E-Tree in VPLS– the same flavor of E-Tree solution as Ethernet Cover all VPLS PE models and their interworking scenarios Benefits A converged solution compatible with both Ethernet and VSI forwarding planes and applicable to diverse network scenarios No change to VPLS architecture and PW layer semantics, standard work can be minimized Scalability with only a single VSI and a single suite of PWs needed

4 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Possible VPLS PE Models for E-Tree R R L Bridge Module VSI Fwder AC NSP VSI Fwder PE PE with Bridge Module RFC 4664 & draft-ietf-l2vpn-vpls-bridge-interop draft-ietf-l2vpn-pbb-vpls-pe-model PE without Bridge Module RFC 3985 & draft-key-l2vpn-vpls-etree-reqt PE R R L AC NSP: Native Service Processing; optional PW CE

5 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing E-Tree Solution in Ethernet IEEE uses a pair of SVLANs - Trunk SVLAN and Branch SVLAN to support generic E-Tree, which is incorporated in the latest IEEE 802.1Q standard UNI Root Leaf Root Leaf Trunk Branch MEN A UNI R R L R R L

6 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing VLAN Based E-Tree Solution in VPLS R R L Bridge Module VSI Fwder Root PW CE1 AC PW Leaf Bridge PE1 PE2 Root Leaf L R R Bridge 2 VLANs into a VSI PE3 CE2 CE3 CE4 CE5 Tagged PW with 2 VLANs NSP VSI Fwder VSI Fwder VPLS MEN L

7 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing VLAN Mapping Options R R L Bridge Module VSI Fwder Root PW CE1 AC PW Leaf Bridge PE1 PE2 Root Leaf L R R CE2 CE3 CE4 VSI Fwder VLAN mapping options VLAN mapping options VPLS MEN PE3 CE5 NSP VSI Fwder L

8 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing E-Tree Processing PW works in Tagged mode PE may be provided with VLAN mapping capability Remote Root VLAN Local Root VLAN Remote Leaf VLAN Local Leaf VLAN At the ingress PE, Ethernet frames with Root or Leaf VLAN encapsulated in the same PW and transparently label switched At the egress PE, Ethernet frames translated into Local Root or Leaf VLAN Leaf VLAN traffic filtered either at Leaf UNI on egress PE, or on ingress PE when its egress PE is a pure leaf PE

9 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Extension of LDP Protocol A new E-Tree sub-TLV is defined for PW interface parameters TLV PEs negotiate the support of E-Tree when a PW is set up Root VLAN ID and Leaf VLAN ID carried in the sub-TLV Several bits to help the negotiation procedure

10 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Next Step The authors would like to request more WG feedbacks on mailing list To be accepted as WG draft?

11 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Backup Slides

12 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing E-Tree Solutions in IEEE (multi-domain) Trunk SVLAN and Branch SVLAN are also used to provide E- Tree service across multiple domains where roots and leaves located diversely Root UNI Leaf UNI NNI MEN A MEN C MEN B NNI Trunk Branch

13 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Asymmetric VLAN Mapping in IEEE Ingress and egress frames at Root and Leaf UNI are tagged with a single C-VLAN In the network between Roots and Leaves, frames are tagged with Trunk or Branch S-VLAN Ingress TranslationEgress Translation At Root At Leaf C-VLAN ==>Trunk S-VLAN C-VLAN==>Branch S-VLAN Trunk S-VLAN ==>C-VLAN Branch S-VLAN==>C-VLAN Trunk S-VLAN ==>C-VLAN Branch S-VLAN Discarded

14 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - Beijing Thank You