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Overview of Provider Backbone Bridging and Integration Alternatives with Virtual Private LAN Service BRKSPG-2203 Agenda Introduction Principles of PBB Network Operation PBB Bridge Model PBB Resiliency and Protection Mechanisms Challenges in (H-)VPLS PBB Integration with (H-)VPLS VPLS PBB in H-VPLS with Ethernet Access PBB in H-VPLS with MPLS Access Migration Options Summary BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 2 About This Session This session discusses Provider Backbone Bridging (PBB – IEEE 802.1ah) technology. A primer of PBB is presented along with explanation of the principles of network operation. Applicability of PBB to Carrier Ethernet service providers and integration with virtual private LAN service (VPLS) are discussed. Interoperability scenarios of PBB with VPLS are covered with emphasis on how the combined solution addresses existing challenges in VPLS. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 3 Introduction BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 4 Overview Provider Backbone Bridging (PBB) defines an architecture & protocol that enables Service Providers to build large scalable Ethernet bridged networks. Support up to 224 service instances per bridged domain Provide customer MAC address hiding from SP core Standardized in IEEE as Std. 802.1ah-2008. Builds upon and extends Provider Bridging (IEEE 802.1ad, aka Q-in-Q). BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 5 Hierarchical Network Architecture Backbone Core Bridges (BCB) BCB 4 802.1ah Provider Backbone Bridging Network (PBBN) BCB 1 BCB 3 BCB 2 BEB1 802.1ad Provider Bridging Network (PBN) BEB2 Backbone Edge Bridges (BEB) PB1 PEB2 PEB1 CE1 CE2 802.1Q Customer Bridges H201 … H400 H1 … H200 BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 6 Provider Backbone Bridge Taxonomy 802.1ad SVLAN Bridge For 802.1ad to 802.1ah interconnect & for hierarchical PBB networks BRKSPG-2203 Typical BEB for 802.1ad to 802.1ah interconnect (UNI) © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public Typical BEB for inter-provider interconnect (E-NNI) 7 Operation at a Glance PBB provides a ‘MAC tunneling’ scheme to transport Ethernet frames between BEBs. BEBs are responsible for translating frames to/from new PBB format. All intelligence is on BEBs. BCBs are regular 802.1ad Provider Bridges. Allows upgrading from 802.1ad to 802.1ah by updating the edge nodes only. BCB 4 BEB4 BEB3 Si BCB 1 PBB encapsulation / decapsulation Si Si Si BCB 3 PBB encapsulation / decapsulation BCB 2 BEB1 BEB2 PBB-encapsulated Frame Customer Frame BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Customer Frame Cisco Public 8 PBB Frame Format Overview I-TAG: Contains 24 Bits to Identify a Service Instance B-DA B-SA B-TAG … . I-SID Second MAC-Header C-DA C-SA S-TAG C-TAG Payload FCS B-TAG: same Ethertype as S-Tag Service Instance Scalability New 24-bits Service Instance Identifier (I-SID) instead of 12-bits VLAN Domain Isolation & MAC-Address Scalability Encapsulate Customer MAC frames at the edge of the network into Backbone MAC frames: New MAC header Backwards Compatibility with IEEE 802.1ad Ethertype of B-VLAN is the same as 802.1ad S-VLAN (0x88a8) PBB leverages existing L2 control plane mechanisms BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 9 PBB Frame Formats Variants I-Tagged Frame B-DA B-SA EtherType: 0x88e7 S-Tag C-Tag I-Tag B-Tagged Frame B-DA B-SA B-Tag Data FCS EtherType: 0x88a8 EtherType: 0x88e7 I-Tag Data S-Tag C-Tag I-PCP I-DEI UCA RES I-SID Bits 3 1 1 Priority Code Points Drop Eligibility Indication Use Customer Addresses Reserved 3 24 FCS C-DA 48 C-SA 48 Service Instance Identifier C-DA: Customer Destination Address C-SA: Customer Source Address FCS: Frame Check Sequence C-Tag: 802.1Q VLAN / Customer VLAN Tag – C-VLAN Tag S-Tag: Service Provider VLAN Tag – S-VLAN Tag © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public B-DA: Backbone Destination Address B-SA: Backbone Source Address B-Tag: Backbone VLAN (B-VLAN) Tag I-Tag: Service Instance (I-SID) Tag BRKSPG-2203 10 Principles of PBB Network Operation BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 11 Service Mapping and Bundling S-VLAN B-VLAN I-SID 802.1ah BEB BEB BCBs 802.1ad BEB 802.1ad BEB S-VLANs from access mapped or bundled into I-SIDs on BEBs. I-SID provides service identification in PBB network. Global in scope within a single operator’s network I-SIDs bundled into B-VLANs for transport over PBB core. B-VLAN defines transport topology in PBB network (e.g., a spanning-tree). BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 12 Addressing and BEB Identification C-MAC Address 802.1ah BEB 802.1Q C1 CE B-MAC Address BEB B1 B4 B2 C2 802.1ad BEB 802.1Q C3 CE C4 B3 BEB 802.1ad BCBs Each BEB uniquely identified by one or more unicast B-MAC addresses. Additionally, a BEB may listen in to one or more B-MAC multicast group addresses B-MAC addresses guaranteed to be unique within a provider’s network & may be administered by operator. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 13 MAC Address Learning C-MAC Address Space 802.1ah 802.1ad B-MAC Address Space BEB BEB BEB BEB 802.1ad BCBs Backbone Edge Bridge (BEB): Learn and forward based on both Customer MAC (C-MAC) and Backbone MAC (B-MAC) addresses Build a mapping of C-MAC to B-MAC addresses Backbone Core Bridge (BCB): Learn and forward based on B-MAC addresses only BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 14 Bridge Forwarding Database (FDB) Identification S-VLAN 802.1ah 802.1ad I-SID B-VLAN BEB BEB BEB BEB 802.1ad BCBs Backbone Edge Bridge (BEB): B-MAC Address Space: FDB selected based on B-VLAN C-MAC Address Space: For frames ingress from access, FDB selected based on S-VLAN For frames ingress from core, FDB selected based on I-SID Backbone Core Bridge (BCB): FDB selected based on B-VLAN BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 15 Network Packet Flow Known Unicast C-MAC Address B-MAC Address 802.1ad BEB 802.1ah BEB 802.1ad 802.1Q CE B2 C1 B3 Egress BEB Ingress BEB C4 C1 C-VLAN 802.1Q CE C4 C4 C1 S-VLAN C-VLAN DA SA DA SA C4 C1 S-VLAN C-VLAN DA SA B3 B2 B-VLAN I-SID B-DA B-SA C4 C1 S-VLAN C-VLAN C-DA C-SA Ingress BEB encapsulates frame with PBB header B-MAC DA is set to egress BEB’s MAC address (learnt via reverse traffic) B-MAC SA set to ingress BEB’s MAC address I-SID determined based on S-VLAN & B-VLAN determined based on I-SID Egress BEB strips off PBB encapsulation BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 16 Network Packet Flow Multicast, Broadcast and Unknown Unicast C-MAC Address B-MAC Address 802.1ad 802.1Q CE BEB 802.1ah G3 802.1ad 802.1Q CE G3 C4 G3 Egress BEB C4 C1 S-VLAN C-VLAN B2 C1 BEB Ingress BEB C4 C1 C-VLAN DA SA DA SA C4 C1 S-VLAN C-VLAN DA SA G3 B2 B-VLAN I-SID B-DA B-SA C4 C1 S-VLAN C-VLAN C-DA C-SA Ingress BEB encapsulates frame with PBB header B-MAC DA is set to B-MAC multicast group address B-MAC SA set to ingress BEB’s MAC address I-SID determined based on S-VLAN & B-VLAN determined based on I-SID One or multiple egress BEBs listen in to the group address BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 17 Network Packet Flow B-MAC Multicast Group Addresses Default B-MAC multicast group address for customer multicast, broadcast and unknown unicast is the ‘Backbone Service Instance Group Address’: 00-1E-83 I-SID Backbone Service Instance Group address OUI Operator can override the default by administering multicast group addresses based on: I-SID I-SID + Customer multicast MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 18 802.1ah Service Interfaces Port-Based Service Interface (UNI) 802.1ah 802.1Q 802.1ad 802.1ah 802.1Q Port Mode 802.1ad BEB C-VLAN I-SID Map all untagged, C-VLAN tagged and priority tagged frames to a single S-VLAN / I-SID. Allows connecting the following to PBB network: IEEE 802.1Q C-VLAN bridge IEEE 802.1D Bridge (VLAN unaware) Router End-station BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 19 802.1ah Service Interfaces S-Tagged Service Interface (UNI) 802.1ad BEB S-VLAN I-SID 802.1ah 802.1ah S-VLAN Bundle Mode 802.1ad BEB S-VLAN I-SID 802.1ad 802.1ah 802.1ad 802.1ad 802.1Q 802.1ad S-VLAN Mode Port Mode 802.1ah 802.1ad BEB S-VLAN I-SID Port Mode: All S-VLANs on UNI mapped to single I-SID S-VLAN Mode: Single S-VLAN on UNI mapped to single I-SID Need not carry S-VLAN over PBB network S-VLAN Bundle Mode: Group of S-VLANs on UNI mapped to single I-SID BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 20 802.1ah Service Interfaces 802.1ad BEB 802.1Q 802.1ad 802.1ah 802.1ah I-Tagged Service Interface (Inter-provider NNI) 802.1ah BEB I-Tagged Frames B-VLAN I-SID I-SID B-VLAN I-Tagged Service Interface used for inter-provider interconnect (E-NNI), supports: Bundling I-SIDs into B-VIDs Allow independent provider topologies for same service Translating I-SIDs Scope of I-SID limited to single provider Translating B-MAC destination addresses Allow per-provider multicast group definition BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 21 802.1ah Service Interfaces C-Tagged Service Interface (UNI) BEB C-VLAN I-SID 802.1ah 802.1Q 802.1ad 802.1Q 802.1ad C-VLAN Bundle Mode 802.1ah 802.1Q C-VLAN Mode 802.1ah 802.1ad BEB C-VLAN I-SID C-VLAN Mode: Single C-VLAN on UNI mapped to single I-SID Need not carry C-VLAN over PBB network C-VLAN Bundle Mode: Group of C-VLANs on UNI mapped to single I-SID Note: this is an extension beyond IEEE Std 802.1ah-2008 BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 22 802.1ah Bridge Model BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 23 Reminder: Provider Backbone Bridge Taxonomy Focus 802.1ad SVLAN Bridge For 802.1ad to 802.1ah interconnect & for hierarchical PBB networks BRKSPG-2203 Typical BEB for 802.1ad to 802.1ah interconnect (UNI) © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public Typical BEB for inter-provider interconnect (ENNI) 24 BEB Architecture IB-BEB Components 802.1ah IB-BEB I-Component B-Component 802.1ad I-Component Customer Network Port (CNP) Provider Instance Port (PIP) Customer Backbone Port (CBP) PBB Core Provider Network Port (PNP) I-Component: Learns & forwards based on customer MAC addresses Maintains a mapping table of C-MACs to B-MACs Performs PBB encapsulation/decapsulation on PIP B-Component: Learns and forwards based on Backbone MAC addresses Push / pop B-VLAN on CBP BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 25 BEB Architecture IB-BEB Configuration 802.1ah IB-BEB I-Component 802.1ad B-Component I-Component Customer Network Port (CNP) Provider Instance Port (PIP) int gig 1/0 service instance 1 ethernet encapsulation dot1q 20 bridge-domain 100 c-mac IOS CLI IOS-XR CLI int gig 1/0.1 l2transport encapsulation dot1q 20 BRKSPG-2203 Customer Backbone Port (CBP) PBB Core Provider Network Port (PNP) ethernet mac-tunnel virtual acme.com int gig 3/0 bridge-domain 130 service instance 30 ethernet service instance 21 ethernet encapsulation dot1q 130 encapsulation i-sid 12000 bridge-domain 130 bridge-domain 100 c-mac OR int gig 3/0 switchport switchport mode trunk switchport allowed vlan 130 l2vpn bridge group bg1 bridge-domain 100 int gig 3/0.1 l2transport interface gig1/0.1 encapsulation dot1q 130 pbb edge i-sid 12000 core-bridge 130 bridge-domain 130 interface gig3/0.1 pbb core rewrite ingress tag push dot1q 130 symmetric © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 26 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN I-Component 802.1ad I-Component C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 27 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN I-Component 802.1ad I-Component C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID I-Component Relay: •Learn C-MAC SA • Lookup C-MAC DA & identify corresponding B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 28 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID PIP: • Encapsulate customer frame with PBB encapsulation using B-MAC SA of the PIP I-Component Relay: •Learn C-MAC SA • Lookup C-MAC DA & identify corresponding B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 29 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID PIP: • Encapsulate customer frame with PBB encapsulation using B-MAC SA of the PIP I-Component Relay: •Learn C-MAC SA • Lookup C-MAC DA & identify corresponding B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Classify ingress frames based on I-SID • Push B-VLAN & identify corresponding bridge-domain • Optional: translate ISID and B-MAC DA Cisco Public 30 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID PIP: • Encapsulate customer frame with PBB encapsulation using B-MAC SA of the PIP I-Component Relay: •Learn C-MAC SA • Lookup C-MAC DA & identify corresponding B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Classify ingress frames based on I-SID • Push B-VLAN & identify corresponding bridge-domain • Optional: translate ISID and B-MAC DA Cisco Public B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress PNP 31 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Classify ingress frames based on S-VLAN & identify corresponding bridge-domain / I-SID PIP: • Encapsulate customer frame with PBB encapsulation using B-MAC SA of the PIP I-Component Relay: •Learn C-MAC SA • Lookup C-MAC DA & identify corresponding B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Classify ingress frames based on I-SID • Push B-VLAN & identify corresponding bridge-domain • Optional: translate ISID and B-MAC DA Cisco Public PNP: • Filter egress frames based on BVLAN. Forward non-filtered frames onto PBB core B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress PNP 32 BEB Architecture IB-BEB Packet Pipeline - Imposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN I-Component 802.1ad I-Component C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 33 BEB Architecture IB-BEB Packet Pipeline - Disposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN I-Component 802.1ad I-Component C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress CBP 34 BEB Architecture IB-BEB Packet Pipeline - Disposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN I-Component 802.1ad I-Component C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CBP: • Filter egress frames based on I-SID • Pop B-VLAN & forward to IComponent • Optional: translate ISID and B-MAC DA BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress CBP 35 BEB Architecture IB-BEB Packet Pipeline - Disposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB PIP: • Filter ingress frames whose B-MAC DA doesn’t match the PIP’s address. • Classify ingress frames based on I-SID and identify bridgedomain. • Decapsulate PBB header. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Filter egress frames based on I-SID • Pop B-VLAN & forward to IComponent • Optional: translate ISID and B-MAC DA Cisco Public PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress CBP 36 BEB Architecture IB-BEB Packet Pipeline - Disposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB I-Component Relay: • Learn C-MAC SA / BMAC SA association • Lookup C-MAC DA to identify egress CNP. BRKSPG-2203 PIP: • Filter ingress frames whose B-MAC DA doesn’t match the PIP’s address. • Classify ingress frames based on I-SID and identify bridgedomain. • Decapsulate PBB header. © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Filter egress frames based on I-SID • Pop B-VLAN & forward to IComponent • Optional: translate ISID and B-MAC DA Cisco Public PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress CBP 37 BEB Architecture IB-BEB Packet Pipeline - Disposition B-DA B-SA I-SID C-DA C-SA S-VLAN C-VLAN C-DA C-SA S-VLAN C-VLAN B-DA B-SA B-VLAN I-SID I-Component 802.1ad I-Component B-MAC: B2 C-DA C-SA S-VLAN C-VLAN B-Component B-MAC: B1 PBB Core 802.1ah IB-BEB CNP: • Filter egress frames based on S-VLAN & forward non-filtered frames I-Component Relay: • Learn C-MAC SA / BMAC SA association • Lookup C-MAC DA to identify egress CNP. BRKSPG-2203 PIP: • Filter ingress frames whose B-MAC DA doesn’t match the PIP’s address. • Classify ingress frames based on I-SID and identify bridgedomain. • Decapsulate PBB header. © 2010 Cisco and/or its affiliates. All rights reserved. CBP: • Filter egress frames based on I-SID • Pop B-VLAN & forward to IComponent • Optional: translate ISID and B-MAC DA Cisco Public PNP: • Classify ingress frames based on B-VLAN & identify bridgedomain B-Component Relay: • Learn B-MAC SA • Lookup B-MAC DA & identify egress CBP 38 BEB Architecture I-BEB and B-BEB Components 802.1ah I-BEB 802.1Q/ 802.1ad 802.1ah B-BEB I-Component To: To: B-BEB I-BEB or B-BEB PIP CNP CBP I-BEB PBB Core B-Component PNP Comprises I-Component only Connects to 802.1ad/802.1Q network over CNP Connects to B-BEB over PIP B-BEB Comprises B-Component only Connects to either I-BEB or another B-BEB over CBP Connects to Backbone Core Bridge over PNP Note: Packet flows are identical to counterpart components in IB-BEB BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 39 Putting it All Together— an Example PBBN Customer Networks Provider Networks Port-based UNI S-Tagged UNI Hierarchical PBBN PBBN B-BEB I-BEB IB-BEB BCB Peer PBBN 802.1ad S-VLAN bridge B-BEB B-BEB B-BEB 802.1Q C-VLAN bridge B-BEB I-BEB I-Tagged UNI Peer PBN BRKSPG-2203 I-BEB I-Tagged E-NNI © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 40 PBB Resiliency and Protection Mechanisms BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 41 PBN to PBBN Resilient Interconnect Rules PBN Spanning Tree 3 BEB 1 BEB PBN Spanning Tree S-VLAN 100 BEB Spanning Tree 1 1 Spanning Tree PBN PBBN BEB BEB Spanning Tree 1 BEB 4 BEB S-VLAN 100 PBN PBBN 1 Spanning Tree 2 1 BEB 1. Each PBN and PBBN runs an independent spanning-tree. 2. No PBN-to-PBN backdoors. Interconnect between PBNs is via PBBN always. 3. For PBN dual-homed to a PBBN, a data-frame passes in/out through a single interconnect point. (i.e. floods over interconnect are not perpetuated) 4. If PBN connects to multiple PBBNs, an S-VLAN is connected to only one serving PBBN. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 42 Service Interface Protection— Class I and II Customer Network PBBN Customer Network PBBN BEB BEB Class I Class II Note: BEB can be I-BEB, B-BEB or IB-BEB - i.e. applies to S-Tagged and I-Tagged service interfaces. Class I interconnect provides no resiliency. Class II interconnect offers link redundancy. Leverages Link Aggregation as defined in IEEE 802.1AX-2008. Desirable to have the load-balancing based on service-instance boundaries (i.e. active/standby mode, or S-VLAN/I-SID based load-balancing) BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 43 Service Interface Protection—Class III Customer Network PBBN BEB CN1 BEB CN2 Class III Class III interconnect offers node and link protection by connecting multiple customer nodes to multiple BEBs. Note: Each customer node is single-homed to exactly one BEB Possible to use Class II interconnect for each link of Class III interface. When applicable, protection mechanism for Class II interconnect takes precedence, before Class III protection kicks in. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 44 MST Access Gateway (MST-AG) Refer to BRKSPG-2207 for more details on resiliency mechanisms. Setup MST-AG Port Root Advertisement BEB 1 PB PBBN MST Customer MST BEB 2 PB 2nd best bridge advertisement Customer Network BEBs are configured to send static pre-configured BPDUs towards access. One BEB advertises itself as root (lowest Bridge ID / Priority) Second BEB advertises second lowest Bridge ID / Priority & with zero cost path to root. Advantage: allows multiple access networks to be dual-homed to same pair of BEBs while maintaining control-plane separation between them. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 45 MST Access Gateway (MST-AG) Failover Operation MST-AG Port BEB BEB I-SID MAC Flush Notification BEB 1 ! PB Customer MST BEB 2 PB TCN Customer Network Upon failure of primary uplink, Customer Network reacts by failing over to secondary uplink and inform BEB of failover via TCN. BEB sends MRP-based MAC flush notification (MIRP1 or MVRP) over PBBN to remote BEBs to flush MAC address tables. 1: MIRP under standardization in IEEE draft 802.1Qbe BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 46 Multi-Chassis Link Aggregation Control Protocol (mLACP) Setup Virtual LACP Peer BEB 1 PBBN MST ICCP DHD BEB 2 LACP Dual-homed Device (DHD) runs standard IEEE 802.3ad LACP with BEBs. BEBs run Inter-chassis Communication Protocol (ICCP1) among them to synchronize state and appear as a single ‘Virtual LACP Peer’ to DHD. Provides link and node redundancy for DHD. Active/Standby Redundancy Model 1: Under Standardization in IETF - draft-ietf-pwe3-iccp BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 47 Multi-Chassis Link Aggregation Control Protocol (mLACP) Failover Operation Virtual LACP Peer BEB I-SID MAC Flush Notification BEB 1 ICCP BEB ! DHD BEB 2 LACP Upon failure of primary uplink, DHD & BEBs react by failing over to secondary uplink via LACP procedures. BEB sends MRP-based MAC flush notification (MIRP or MVRP) over PBBN to remote BEBs to flush MAC address tables. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 48 Resilient Ethernet Protocol (REP) Setup REP Segment Endpoint BEB 1 PB PBBN MST PB PB PB PB REP BEB 2 PB Customer Network BEBs run REP with the access ring, and MST with the PBBN. REP supports per-VLAN load-sharing over the access ring. VLANs are mapped to an ‘instance’, where one instance runs clockwise and another counter-clockwise on the ring. Advantage: REP supports fast restoration on failure. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 49 Resilient Ethernet Protocol (REP) Failover Operation BEB I-SID MAC Flush Notification BEB 1 ! PB PB PB PB PB REP BEB BEB 2 PB MAC flush Customer Network Upon failure of primary uplink, REP reacts by failing over the affected instance to the secondary segment termination point, and sends a MAC flush indication to BEB. BEB sends MRP-based MAC flush notification (MIRP or MVRP) over PBBN to remote BEBs to flush MAC address tables. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 50 Challenges in (H-)VPLS BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 51 Service Instance Scalability CE3 CE1 IP/MPLS Core 802.1ad PB1 PE A 802.1ad PE B CE4 PB2 CE2 4094 service instances In H-VPLS with 802.1ad (Q-in-Q) access, each bridged network is limited to 4094 service instances. Limitation is due to 12-bits S-VLAN identifier space. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 52 MAC Address Scalability CE3 CE1 PE A PB1 802.1ad PE B PB2 IP/MPLS Core 802.1ad CE4 CE2 Customer MAC Address learning In VPLS / H-VPLS all PEs that perform MAC-layer bridging need to learn customer MAC addresses. As number of customers increases, the number of these addresses grows significantly (hundreds of thousands or even millions). When CE is a bridge (as opposed to router), PEs are exposed not only to CE MAC address but customer end-station addresses, compounding the effect. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 53 Pseudowire Scalability MPLS Access MPLS Access CE1 CE3 IP/MPLS Core U-PE N-PE CE4 N-PE U-PE CE2 H-VPLS today requires dedicated spoke & full-mesh of pseudowires per service instance. Due to possibility of overlapping customer MAC addresses This is true even if two services happen to terminate over the same source and destination PEs. Above translates to signaling overhead (e.g. with targeted LDP) and poses a scalability challenge. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 54 PBB Integration with (H-)VPLS BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 55 Status of Technology PBB integration with (H-)VPLS is an emerging technology that addresses previously mentioned challenges in (H-)VPLS PBB & (H-)VPLS Interoperability is actively being defined by Cisco and other contributors in IETF: draft-ietf-l2vpn-pbb-vpls-interop draft-ietf-l2vpn-pbb-vpls-pe-model BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 56 Interoperability Scenarios at a Glance Topology Access Network PE Service Interface BEB Functionality on VPLS N/A S-Tagged/C-Tagged PE H-VPLS Ethernet B-Tagged PE H-VPLS MPLS S-Tagged/C-Tagged U-PE BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 57 VPLS Configuration int gig 1/0 description UNI-CE1 service instance 1 ethernet encapsulation dot1q 20 bridge-domain 100 c-mac ! int gig2/0 description UNI-CE2 service instance 1 ethernet encapsulation dot1q 20 bridge-domain 100 c-mac ! ethernet mac-tunnel virtual acme.com bridge-domain 130 service instance 21 ethernet encapsulation i-sid 12000 bridge-domain 100 c-mac ! interface vlan 130 xconnect vfi VPLS-130 ! l2vfi VPLS-130 manual neighbor <IP-PE-B> 200 pw-class mpls BRKSPG-2203 802.1Q or 802.1ad Service Interface H1 CE1 IB-BEB PE A B-MAC: A1 IB-BEB IP/MPLS Core CE3 PE B B-MAC: B1 CE2 © 2010 Cisco and/or its affiliates. All rights reserved. H4 Cisco Public 58 VPLS Packet Flow C-DA S-DA S-VLAN C-VLAN Data H1 FCS H4 H1 IB-BEB PE A IB-BEB IP/MPLS Core CE3 PE B 802.1Q or 802.1ad Service Interface B-MAC: B1 B-MAC: A1 CE2 H4 MPLS Encapsulation B-DA B1 S-DA B-VLAN I-SID C-DA S-DA S-VLAN C-VLAN DataH4 FCS A1 H4 H1 Incorporate IB-BEB functionality into the VPLS PE Ingress PE encapsulates customer 802.1Q/802.1ad frames in PBB header and then forwards on EoMPLS pseudowires (PWs). Egress PE disposes of MPLS header then performs PBB decapsulation and forwards customer frame over attachment circuit. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 59 VPLS Service Multiplexing I-SID S-VLAN B-VLAN VPLS Instance CE3 H1 IP/MPLS Core PE B CE2 PE A H4 Single VPLS instance (i.e. full mesh of PWs) is used to multiplex many customer service instances I-SID field in PBB encapsulation provides the service identification. Single VFI for multiple customers is possible because B-MAC addresses are globally unique within a provider’s network 1 VPLS instance per B-VLAN BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 60 VPLS Advantages of PBB Integration Reduce the number of PWs in the core by multiplexing many customer service instances over the same PW full-mesh. Maintain a full-mesh per B-VLAN. Many I-SIDs map to the same B-VLAN. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 61 H-VPLS with Ethernet Access— B-Tagged Service Interface Configuration H1 CE1 IB-BEB 802.1ah CE3 IB-BEB 802.1ah IP/MPLS Core BEB A CE2 BCB PE A B-MAC: A1 int gig 1/0 description UNI-CE1 service instance 1 ethernet encapsulation dot1q 20 bridge-domain 100 c-mac ! ethernet mac-tunnel virtual acme.com bridge-domain 130 service instance 21 ethernet encapsulation i-sid 12000 bridge-domain 100 c-mac ! int gig 3/0 description CORE-FACING dot1q tunneling ethertype 0x88a8 service instance 30 ethernet encapsulation dot1q 130 bridge-domain 130 BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. PE B BCB BEB B CE4 802.1Q or 802.1ad Service Interface B-MAC: B1 H4 int gig 1/0 description ACCESS-FACING dot1q tunneling ethertype 0x88a8 service instance 1 ethernet encapsulation dot1q 130 bridge-domain 130 ! interface vlan 130 xconnect vfi VPLS-130 ! l2vfi VPLS-130 manual neighbor <IP-PE-B> 20 pw-class mpls Cisco Public 62 H-VPLS with Ethernet Access— B-Tagged Service Interface Packet Flow H1 CE1 B-DA S-DA B-VLAN I-SID C-DA S-DA S-VLAN C-VLAN DataH4 FCS B1 A1 IB-BEB H4 H1 802.1ah CE3 IB-BEB 802.1ah IP/MPLS Core BCB PE A BEB A CE2 B-MAC: A1 C-DA S-DA S-VLAN C-VLAN Data PE B BCB BEB B 802.1Q or 802.1ad Interface CE4Service B-MAC: B1 H4 FCS H4 H1 MPLS Encapsulation B-DA B1 S-DA B-VLAN I-SID C-DA S-DA S-VLAN C-VLAN DataH4 FCS A1 H4 H1 IB-BEB functionality on aggregation switch connecting to CE (e.g. BEB A & BEB B). H-VPLS access/aggregation network is PBB instead of 802.1ad /Q-in-Q. VPLS PE connects to BCB over B-Tagged service interface BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 63 H-VPLS with Ethernet Access— B-Tagged Service Interface Service Multiplexing H1 CE1 IB-BEB 802.1ah 802.1ah IP/MPLS Core BEB A CE2 CE3 IB-BEB BCB PE A B-MAC: A1 PE B 802.1Q or 802.1ad Interface CE4Service BCB BEB B B-MAC: B1 VFI B-VLAN VFI H4 VPLS Instance PE functions as per today’s VPLS (e.g. RFC4762), transparent to PBB encapsulation. Treats B-VLAN as if it were S-VLAN (same EtherType) 1:1 mapping of B-VLAN to VFI / VPLS instance B-VLAN provides transparent multiplexing of customer services (i.e. I-SIDs) over the same VFI / VPLS instance Applies to tightly-coupled service domains Same I-SID space in all aggregation networks Congruent I-SID to B-VID bundling in all aggregation networks BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 64 H-VPLS with Ethernet Access— B-Tagged Service Interface Advantages of PBB Integration Support up to 224 service instances per access network, compared to 4094 with 802.1ad access. Reduce the number of PWs in the core by multiplexing many customer service instances over the same PW full-mesh. Better MAC address scalability on the VPLS PE, by learning B-MAC addresses instead of C-MAC addresses. Existing VPLS PE implementations can be used unchanged (i.e. PE upgrade not required) BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 65 H-VPLS with MPLS Access— BEB on U-PE Configuration IB-BEB H1 CE 1 U-PE A MPLS Access B-MAC: A1 N-PE A N-PE B IP/MPLS Core MPLS Access 802.1Q or 802.1ad Service Interface IB-BEB CE2 U-PE B B-MAC: B1 CE3 H4 int gig 1/0 description UNI-CE1 service instance 1 ethernet encapsulation dot1q 20 bridge-domain 100 c-mac ! ethernet mac-tunnel virtual acme.com bridge-domain 130 service instance 21 ethernet encapsulation i-sid 12000 bridge-domain 100 c-mac ! interface vlan 130 xconnect <N-PE-A> 30 pw-class mpls ! BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. l2 vfi VPLS-130 manual vpn id 130 neighbor <N-PE-B> 20 pw-class mpls neighbor <U-PE-A> 20 pw-class mpls no-split-horizon ! interface vlan 130 xconnect vfi VPLS-130 ! Cisco Public 66 H-VPLS with MPLS Access— BEB on U-PE Packet Flow MPLS Encapsulation B-DA B1 S-DA B-VLAN I-SID C-DA S-DA S-VLAN C-VLAN DataH4 FCS A1 IB-BEB H1 CE 1 U-PE A 802.1Q or 802.1ad Service Interface H4 H1 N-PE A MPLS Access B-MAC: A1 N-PE B MPLS Access IP/MPLS Core C-DA S-DA S-VLAN C-VLAN Data IB-BEB CE2 U-PE B CE3 B-MAC: B1 FCS H4 H4 H1 IB-BEB functionality on U-PEs. U-PEs perform PBB encapsulation / decapsulation U-PE provides 802.1Q or 802.1ad service interface to CE. PBB over MPLS encapsulation in access and core. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 67 H-VPLS with MPLS Access— BEB on U-PE Service Multiplexing IB-BEB H1 N-PE A MPLS Access CE 1 N-PE B IP/MPLS Core MPLS Access IB-BEB CE2 U-PE B B-MAC: B1 CE3 802.1Q or 802.1ad Service Interface H4 S-VLAN I-SID B-VLAN Spoke PW One or more S-VLANs are mapped to an I-SID One or more I-SIDs mapped into B-VLAN. B-VLAN has a 1:1 mapping to VFI (spoke PW in this case). Both spoke (access) PWs and PW full-mesh in the core multiplex several customer service instances. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 68 H-VPLS with MPLS Access— BEB on U-PE Advantages of PBB Integration Reduce the number of PWs in the access and the core by multiplexing many customer service instances over the same PW full-mesh. Better MAC address scalability on the N-PE, by learning B-MAC addresses instead of C-MAC addresses. C-MAC address learning confined to U-PEs BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 69 PBB and VPLS Interoperability: Summary of Advantages Topology Access Network PE Service Interface BEB Functionality on Advantages VPLS N/A STagged/ C-Tagged PE Reduce # of PWs in core H-VPLS Ethernet B-Tagged PE Support up to 224 services per access network Reduce # of PWs in core Enhanced MAC address scalability on PE No PE upgrade required H-VPLS MPLS STagged/ C-Tagged U-PE Reduce # of PWs in access network Reduce # of PWs in core Enhanced MAC address scalability on N-PE BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 70 Migration Options BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 71 Overview For Service Providers that already deployed VPLS, migrating to PBB-VPLS must not require a forklift upgrade. Three migration options are explored next. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 72 Option 1: 802.1ad over MPLS in Core 802.1ad / MPLS Access PE B MPLS Core PBB / PBB-MPLS Access PE C CE2 CE 1 PE A PE D CE3 Terminate PBB Ethernet Access 802.1ad 802.1ad over MPLS 802.1ah MPLS Access 802.1ad over MPLS 802.1ad over MPLS 802.1ah over MPLS PE that connects new PBB-capable access network to core (e.g. PE C) terminates PBB encapsulation. Advantage: No changes to existing access networks. Disadvantage: Communication between two PBB-capable access networks requires PBB-to-802.1ad-to-PBB translation. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 73 Option 2: PBB over MPLS in Core 802.1ad / MPLS Access PE B PBB-MPLS Core PBB / PBB-MPLS Access PE C CE2 CE 1 PE A PE D CE3 Terminate PBB Ethernet Access 802.1ad 802.1ah over MPLS 802.1ah MPLS Access 802.1ad over MPLS 802.1ah over MPLS 802.1ah over MPLS PE that connects existing PBB-incapable access network to core (e.g. PE B) terminates PBB encapsulation. Advantage: PW scalability in core, MAC address scalability on PBB capable PEs. Disadvantage: Requires upgrade of PEs connecting existing access networks to the core. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 74 Option 3: Mixed Core Ethernet Access 802.1ah 802.1ah over MPLS 802.1ah MPLS Access 802.1ah over MPLS 802.1ah over MPLS 802.1ah over MPLS PBB / PBB-MPLS Access PE E CE 4 Mixed Core PBB / PBB-MPLS PE Access C PE F CE2 PE D PE B PE A 802.1ad / MPLS Access CE 1 CE3 Selectively Terminate PBB Ethernet Access 802.1ah 802.1ad over MPLS 802.1ah MPLS Access 802.1ad over MPLS 802.1ad over MPLS 802.1ah over MPLS PE that connects new PBB-capable access network to core (e.g. PE C and PE F) decide whether or not to terminate PBB depending on capability of the far end access network. Advantages: PW scalability in core, MAC address scalability on PBB capable PEs, no upgrade to existing networks. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 75 Migration Options: Summary Option Ethernet frame format over core Pros Cons 1 802.1ad No upgrade for existing access networks PBB-to-PBB access network communication requires double translation (to/from 802.1ad) 2 PBB PW scalability in core Requires upgrade of PEs in existing access networks MAC address scalability on PE of PBB access network 3 Mixed 802.1ad and PBB PW scalability in core MAC address scalability on PE of PBB access network No upgrade for existing access networks BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 76 Summary BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 77 PBB—Summary PBB is an IEEE technology that defines a MAC tunneling mechanism. PBB addresses the issue of service instance scalability by defining a 24-bit service identification field (I-SID) PBB solves the issue of MAC address scalability in service provider networks by confining customer MAC address learning to the edge and mapping CMAC addresses to Backbone MAC addresses on BEBs. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 78 PBB Integration with (H-)VPLS— Summary PBB integration with (H-VPLS) allows SPs to leverage the advantages of both technologies. Combined solution allows PEs to achieve better MAC address scalability. Combined solution allows reduction of the number of PWs in the network. Combined solution allows H-VPLS with native Ethernet access to scale beyond 4K service instances per bridged access network. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 79 IEEE 802.1ah Platform Support Scalable Edge Services Cisco ASR 9000 Cisco 7600 IOS 12.2(33)SRE ES+ linecards BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. IOS-XR 3.9.1 Cisco Public 80 Acronyms Acronym Acronym B-BEB B-Component BEB IETF Internet Engineering Task Force BCB Backbone Core Bridge I-SID Instance Service Identifier (24 bits) B-DA Backbone Destination Address I-Tag I-SID Tag BEB Backbone Edge Bridge LSM Label Switched Multicast B-MAC Backbone MAC Address MAC Media Access Control B-SA Backbone Source Address MPLS Multi-protocol Label Switching B-Tag B-VLAN Tag N-PE Network-facing Provider Edge device B-VLAN Backbone VLAN PB Provider Bridge C-DA Customer Destination Address PBB Provider Backbone Bridge/Bridging CE Customer Equipment (Edge) PBBN Provider Backbone Bridging Network C-MAC Customer MAC Address PBN Provider Bridging Network C-SA Customer Source Address PE Provider Edge device C-Tag C-VLAN Tag PW Pseudowire C-VLAN / CE-VLAN Customer VLAN Q-in-Q VLAN tunneling using two 802.1Q tags SA Source MAC Address DA Destination MAC Address S-Tag S-VLAN Tag EoMPLS Ethernet over MPLS S-VLAN Service VLAN (Provider VLAN) FCS Frame Check Sequence UNI User to Network Interface H-VPLS Hierarchical VPLS U-PE User-facing Provider Edge device IB-BEB Combined I-Component & B-Component BEB VFI Virtual Forwarding Instance I-BEB I-Component BEB VLAN Virtual LAN VPLS Virtual Private LAN Service IEEE Institute of Electrical and Electronics Engineers BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 81 Complete Your Online Session Evaluation Give us your feedback and you could win fabulous prizes. Winners announced daily. Receive 20 Cisco Preferred Access points for each session evaluation you complete. Complete your session evaluation online now (open a browser through our wireless network to access our portal) or visit one of the Internet stations throughout the Convention Center. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Don’t forget to activate your Cisco Live and Networkers Virtual account for access to all session materials, communities, and on-demand and live activities throughout the year. Activate your account at any internet station or visit www.ciscolivevirtual.com. Cisco Public 82 References IEEE Standard 802.1ah-2008 draft-ietf-l2vpn-pbb-vpls-interop draft-ietf-l2vpn-pbb-vpls-pe-model draft-ietf-pwe3-iccp BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 84 Related Sessions BRKSPG-2204: Building Carrier Ethernet Services Using Cisco Ethernet Virtual Circuit (EVC) Framework. BRKSPG-2207: Redundancy Mechanisms for Carrier Ethernet and Layer 2 VPN Services. BRKSPG-2203 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Public 85