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Provider Ethernet Network ChallengesBusiness and residential customers require an SLA with guaranteed bandwidth, jitter an...
VLAN Cross Connect Taking Ethernet One Step FurtherConnection-Oriented techniqueEnables traffic engineering and fast recove...
Service ModelDestination MAC   Source MAC   C-tag   Ether Type / Len                      Data          FCSDestination MAC...
Concept     Standard VLAN Bridging: Switching based on MAC addresses and VLANs     VLAN Cross Connect: Cross Connect accor...
Bridging / VLAN Cross Connect SelectorVLAN ID of the frame’s outer VLAN tag acts as method selector                       ...
Frame Semantic          VLAN Cross Connect identifier has local port scope          Frame format as defined in IEEE 802.1Q  ...
Frame Semantic                       Extended VLAN Cross Connect                       Frame Format as defined in IEEE 802....
Process ExampleIn Port   Ingress VLAN                          OUt Port                             Egress VLAN   1       ...
Network Reference Model          PE-Node            P-Node            P-Node        PE-Node                               ...
VLAN Cross Connect with CE-VLAN Preservation Example                                                 VLAN Cross Connect Co...
Extended VLAN Cross Connect Example                                                VLAN Cross Connect Connection          ...
Traffic Engineering                                                                             E-line between two business...
VLAN Cross Connect Network Resiliency                                                                     Protected XC    ...
Scalability                                       EVXC   EVXC                                 MAC                         ...
Reference DocumentsProvider Ethernet VLAN Cross Connect by Philippe Klein, Nurit Sprecher - SiemensSurpass Carrier Etherne...
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Provider ethernet vlan cross connect

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Provider Ethernet VLAN Cross Connect

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Provider ethernet vlan cross connect

  1. 1. Provider Ethernet Network ChallengesBusiness and residential customers require an SLA with guaranteed bandwidth, jitter anddelayNetwork resiliency with ~50ms recoveryHuge number of MAC addresses in a single EThernet domainScalable VLAN networks to provide dedicated VLAN per customer in wholesale solutionsNetworks and services must be securedNetworks should be kept simple to minimize CAPEX Voice IP/MPLS Metro Aggregation ISPs ASPs
  2. 2. VLAN Cross Connect Taking Ethernet One Step FurtherConnection-Oriented techniqueEnables traffic engineering and fast recoveryResolves MAC scalabilityResolves VLAN scalabilityInherent subscriber identification VoiceResolves security issues IP/MPLSKeep the Network simple VLAN Cross Connect Metro Aggregation ISPs ASPs
  3. 3. Service ModelDestination MAC Source MAC C-tag Ether Type / Len Data FCSDestination MAC Source MAC S-tag C-tag Ether Type / Len Data FCS At the boundary of the VLAN-XC domain, the VLAN ID of the outer tag (C-tag or S-Tag) can be used to associate the frame with a particular VLAN-XC connection. If required, the outer tag (C-tag or S-tag) is preserved and transparently transported within the VLAN-XC domain
  4. 4. Concept Standard VLAN Bridging: Switching based on MAC addresses and VLANs VLAN Cross Connect: Cross Connect according to the ingress port and the VLAN-XC Tag, regardless of the MAC addresses Ingress Layer 2 packet Destination MAC Source MAC VLAN Tag Ether Type / Len Data FCSIngress Port i Destination MAC Source MAC VLAN Tag Ether Type / Len Data FCS VLAN Cross Connect coexists with standard VLAN bridging, even on the same port VLAN Cross Connect eliminates MAC learning per VLAN VLAN Cross Connect enables up to 16M connections per port
  5. 5. Bridging / VLAN Cross Connect SelectorVLAN ID of the frame’s outer VLAN tag acts as method selector Frames Outer 802.1Q VLAN Tag 802.1Q/ah Tagged Frame Destination MAC Source MAC TPID TCI Ether Type / Len Data FCS C PCP F VLAN ID I Bridging Method VLAN-XC Method C CDestination MAC PCP F VLAN ID Ingress Port PCP F VXC ID I I
  6. 6. Frame Semantic VLAN Cross Connect identifier has local port scope Frame format as defined in IEEE 802.1Q VLAN Cross Connect tagged frame allows up to 4K VLANs per port VXC-TAGDestination MAC Source MAC TPID TCI Ether Type / Len Data FCS C 12-bit VLAN Cross Connect ID PCP F VXC ID up to 4K VLANs per port I
  7. 7. Frame Semantic Extended VLAN Cross Connect Frame Format as defined in IEEE 802.1ad VLAN Cross Connect tagged frame allows up to 16M VLANs per port EVXC-TAGDestination MAC Source MAC TPID TCI TPID TCI Ether Type / Len Data FCS C C PCP F VLAN ID PCP F VLAN ID I I 24-bit VLAN Cross Connect ID EVXC ID up to 16M VLANs per Port
  8. 8. Process ExampleIn Port Ingress VLAN OUt Port Egress VLAN 1 10 7 110 2 10 5 120 3 30 5 130 3 40 6 130 4 40 7 140 4 50 Bridging according to MAC Destination and VLAN ID 50 Cross Connect VID=120 VID=10 Port 1 Port 5 VID=130 VID=130 VID=10 Port 2 Port 6 VID=50 VID=30 VID=110 Port 3 Port 7 VID=40 VID=140 VID=40 Port 4 Bridge Port 8 VID=50 VID=50
  9. 9. Network Reference Model PE-Node P-Node P-Node PE-Node P-Node PE-Node P-Node P-Node PE-NodeProvider Edge Nodes (PE-Nodes) reside at the boundary of the provider network andcreate / terminate VLAN-XC connectionsProvider Internal Nodes (P-Nodes) perform VLAN Cross Connect switching
  10. 10. VLAN Cross Connect with CE-VLAN Preservation Example VLAN Cross Connect Connection PE-Node P-Node P-Node PE-Node L2 L2 L2 L2 L2 Frame Frame Frame Frame Frame Port 3 Port 6 Port 2 Port 8 Port 4 Port 12 Port 6 Port 9Destination MAC Destination MAC Destination MAC Destination MAC Destination MAC Source MAC Source MAC Source MAC Source MAC Source MAC CE-VLAN VXC=1024 VXC=236 VXC=2636 CE-VLAN CE-VLAN CE-VLAN CE-VLAN
  11. 11. Extended VLAN Cross Connect Example VLAN Cross Connect Connection PE-Node P-Node P-Node PE-Node L2 L2 L2 L2 L2 Frame Frame Frame Frame Frame Port 3 Port 6 Port 2 Port 8 Port 4 Port 12 Port 6 Port 9Destination MAC Destination MAC Destination MAC Destination MAC Destination MAC Source MAC Source MAC Source MAC Source MAC Source MAC CE-VLAN CE-VLAN EVXC=12045 EVXC=645 VXC=15320 CE-VLAN CE-VLAN CE-VLAN
  12. 12. Traffic Engineering E-line between two business customer sitesSite A Site B Selected bridged path for traffic between Site A and Site B Traffic-engineerred path with guaranteed QoS VLAN Cross Connect enables traffic engineering Can be implemented using a domain-wide provisioning tool GMPLS control plane once standardized
  13. 13. VLAN Cross Connect Network Resiliency Protected XC 1:1 Backup XC1:1 Global Protection with extra trafficPre-provisioned backup paths using network-wide provisioning toolsSub-50ms recoveryRevertive or non-revertive modeGMPLS resiliency mechanisms could be applied once GMPLS for Ethernet is standardized( include Fast Reroute)
  14. 14. Scalability EVXC EVXC MAC Tag Tag EVXC EVXC MAC Tag Tag Level n+1 EVXC EVXC MACMAC Tag Tag EVXC EVXC MACMAC Tag Tag Level n Level n VLAN Cross Connect can be naturally extended to work with hierarchical domains using tunneling Uses standard VLAN stacking
  15. 15. Reference DocumentsProvider Ethernet VLAN Cross Connect by Philippe Klein, Nurit Sprecher - SiemensSurpass Carrier Ethernet Jan 2006IEEE Standard 802.3 ,CSMA/CD EthernetIEEE Standard 802.1Q ,Virtual LANIEEE Standard 802.1ad ,Q-in-QIEEE Standard 802.1ah draft ,MAC-in-MAC

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