Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 1 77th IETF - Anahaim VPLS PE Model with E-Tree Support Yuanlong Jiang draft-jiang-l2vpn-vpls-etree-pe-00.txt

2 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim E-Tree Requirements on VPLS  E-Tree Service An EVC service defined in MEF (MEF 6.1, MEF 10.2) Rooted Multipoint EVC (Multi-root possible), each UNI is either Root or Leaf Connectivity: Root to Leaf, Leaf to Root, Root to Root Prohibited: Leaf to Leaf  Problems VPLS is based on full mesh connectivity, how to provide E-Tree service in VPLS and guarantee the segregation between the leaves when E-Tree is a multi-rooted tree?  History , problem of E-Tree in PBB-VPLS first raised in BBF , two I-Ds proposed to solve the general problem of E-Tree in VPLS in IETF , two presentations discussed to solve the problem of E-Tree in Ethernet in IEEE

3 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim CE E-Tree Challenges in VPLS Root CE UNI CE Leaf UNI CE Leaf Root CE UNI Leaf How to provide E-Tree service with scalability in the MPLS/VPLS network? How to do Leaf segregation when PE dual feed both Root & Leaf? UNI CE UNI

4 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim E-Tree Scheme in IEEE  Asymmetric VLAN (IEEE 802.1Q) Root/Leaf attached to bridge in untagged mode Configure PVID and member set for each access port  Stephen Haddock proposed to use only a pair of Trunk VLAN and Branch VLAN for muti-root E-Tree, this capability is anticipated to be provided in future revisions of 802.1Q Server R R LL PVID=1 Port1 PVID=2 Port2 Port3 PVID=3 Member Sets: Red – Port 1, 2 Blue – Port 3 Green-Port 3 Untagged Sets: Red – Port 1, 2 Blue – Port 3 Green-Port 3

5 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim C C VPLS PE Model Defined in IETF (Model 2) SVLAN Bridge CVLAN Bridge CVLAN Bridge VS I VPLS PE Model draft-ietf-l2vpn-vpls-bridge-interop-04 S-VLAN-1 S-VLAN-2 PW VPLS PE Model (802.1ad) with 2 stages of bridge - a typical implementation CE AC PW C C C C C C

6 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim R R L A Model 2 Compatible E-Tree Scheme R R L SVLAN Bridge CVLAN Bridge CVLAN Bridge VS I VPLS PE Model – 2 VSI per E-Tree Root VLAN Leaf VLAN PW 2 VSIs and 2 sets of PWs are needed per E-Tree if we incorporate the enhanced Asymmetric VLAN into the VPLS PE model 2 CE AC PW

7 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim R R L Enhanced Model 2 (Tree VSI) R R L SVLAN Bridge CVLAN Bridge CVLAN Bridge T-VSI VS I Enhanced VPLS PE Root S-VLAN-2 PW 1.Tree VSI (T-VSI) attached to S-VLAN bridge with Root VLAN and Leaf VLAN, and work in shared VLAN learning 2.Traffic from Root or Leaf UNI distributed into Root VLAN and Leaf VLAN 3.Only one T-VSI and one set of PWs needed per E-Tree CE AC PW Leaf Bridge 2 S-VLANs into Tree VSI

8 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim Interconnection Scenario R R L SVLAN Bridge CVLAN Bridge CVLAN Bridge T-VSI PE Interconnection with T-VSI Root PW Either PE1 or PE2 can do VLAN translation (either when enter or exit PW) Bridge module filters Leaf VLAN traffic on the egress Leaf port CE AC PW Leaf SVLAN Bridge PE1 PE2 Root Leaf L R R

9 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim PW Processing  PW works in Tagged mode At least one end of PE provided with the VLAN mapping capability Remote Root VLAN Local Root VLAN Remote Leaf VLAN Local Leaf VLAN At the PW ingress, Root or Leaf VLAN encapsulated in the same PW and transparently label switched At the PW egress, Ethernet frames translated into Local Root or Leaf VLAN

10 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim Extension of LDP Protocol  E-Tree sub-TLV is defined as one of interface parameters PEs negotiate their supports of E-Tree (T-VSI) when the PW is set up Root VLAN ID and Leaf VLAN ID carried in the sub-TLV P bit indicate that PE is attached with “Pure Leaves” R bit is a request flag for “Remote VLAN Translation” | E-Tree | Length=8 | Reserved |P|R| | Root VLAN ID | Leaf VLAN ID |

11 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 77th IETF - Anahaim Next Step  The authors would like to request more WG feedbacks