1. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 1 draft-boutros-l2vpn-vpls-active-active-00.txt

2. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 2 PE1PE10 PE3 Site1 Site3 Site2 M2 M3 PE2 Site5 M5 Site4 AC4 AC1 AC10 AC5 AC3 PE30 AC30 AC2 MHID 1 MHID 3 B3 M1 B1 AC300 Site6 M30 AA-VPLS - Signalling PE3’s upstream label for MHID3 = 30, 31 PE3 signals that its upstream label for MHID=3 is 30/31. Any remote PE in the same VPLS instance will recognize that any packet coming from PE3 with the next label after the PW label =30/31 is coming from MHID3. It will thus learn the SMAC as being in MHID3. It will not reinject the packet into MHID3

3. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 3 PE1PE10 PE3 Site1 Site3 Site2 M2 M3 PE2 Site5 M5 Site4 AC4 AC1 AC10 AC5 AC3 PE30 AC30 AC2 MHID 1 MHID 3 B3 M1 B1 AC300 Site6 M30 [S: M3, D: M1] AA-VPLS – Unknown/Mcast [S: M3, D: M1] 31 - [S: M3, D: M1] PE3 and PE30 signaled the MH-Site-ID3 and upstream labels. PE3 and PE1 are DF for Site 3 and Site 1 and PE3 is DF for site10 1.Mcast Packet with src MAC M3 arrives at PE3. 2.PE3 floods packet to AC40 and AC13. 3.PE3 encap packet with upstream label (Flood to DF at MH Sites) and flood over PWs or over p2mp LSP to PE1, 2, 10, 30. 4.On PE1,2,10,30 learning of M3 will be against MH virtual port (MHID3). 5.PE1, floods packet to AC4 and AC1 (DF for Site1). 6.PE10 floods only to AC5 and PE2 to AC2. 7.On PE30, learning will be against MH Virtual port. 8.PE30, floods packet to AC300.

4. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 4 PE1PE10 PE3 Site1 Site3 Site2 M2 M3 PE2 Site5 M5 Site4 AC4 AC1 AC10 AC5 AC3 PE30 AC30 AC2 MHID 1 MHID 3 B3 M1 B1 AC300 Site6 M30 [S: M3, D: M1] AA-VPLS – Known Unicast [S: M3, D: M1] 30 - [S: M3, D: M1] Assume PE3 and PE1 are DF for Site 3 and Site 1. 1.Packet with src MAC M3 arrives at PE30. 2.PE30 encap packet with upstream label (Unicast Packet) and send packet over PW PE10. 3.On PE10 learning of M3 will be against MH virtual port (MHID3). 4.PE10 sends packet to M5 over AC5. VFI table of PE3: M1’ M1 M1’ MHID1: {PE1, PE10} M1’’ PE1 PE10

5. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 5 Properties Per-flow load-balancing among multiple active attachment circuits connected to the same multi-homed site Fast Convergence upon redundant link or node failure Flexible PE location Shortest-path routing P2M Multicast optimization MAC Flush reduction Policy support (E-TREE and more) No requirement for control-word presence