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Regional VPLS Vach Kompella Joe Regan Ron Haberman Alcatel-Lucent.

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Presentation on theme: "Regional VPLS Vach Kompella Joe Regan Ron Haberman Alcatel-Lucent."— Presentation transcript:

1 Regional VPLS Vach Kompella Joe Regan Ron Haberman Alcatel-Lucent

2 draft-vkompella-l2vpn-rvpls-00 2 Problem: Scaling a VPLS Flat architecture Too many end-to-end sessions Too much replication Few labels

3 draft-vkompella-l2vpn-rvpls-00 3 More on Scaling Hierarchical VPLS Reduces end-to-end sessions Reduces replication Too many MACs learned at n-PE More labels

4 draft-vkompella-l2vpn-rvpls-00 4 More on Scaling Use MS-PWs –Reduces number of sessions –Keeps MAC address learning to minimum –Too much replication –Many more labels

5 draft-vkompella-l2vpn-rvpls-00 5 What Have We Learned Four important dimensions of scaling –Sessions –Replication –MAC address learning –Labels

6 draft-vkompella-l2vpn-rvpls-00 6 Regional VPLS Use MS-PW for scaling sessions Use hierarchy to scale replication Use hierarchy to reduce labels Use regional labels to reduce MAC address learning

7 draft-vkompella-l2vpn-rvpls-00 7 Regional VPLS Model Half-FIB Full-FIB Regional PE

8 draft-vkompella-l2vpn-rvpls-00 8 New Concepts Regional PE: a dual nature PE which behaves like an S-PE to the core and nPE to the region Half-FIB: a FIB of local MAC addresses learned from the region

9 draft-vkompella-l2vpn-rvpls-00 9 R-VPLS Operation - Forward Learn M1 at PE1 Flood M2 Learn M1 is Blue BlueGreen Red PE1 M1 PE2 M2 RPE1 RPE2 RPE3 Flood M2

10 draft-vkompella-l2vpn-rvpls-00 10 R-VPLS Operation – Optimized Flooding Learn M1 at PE1 Flood M2 Flood M2 using Flood PW Learn M1 is Blue BlueGreen Red PE1 M1 PE2 M2 RPE1 RPE2 RPE3 Flood M2

11 draft-vkompella-l2vpn-rvpls-00 11 R-VPLS Operation - Reverse Forward M1 to PE1 Learn M2 is Green Blue Red PE1 M1 RPE1 RPE2 RPE3 Forward M1 on Blue PW Green PE2 M2 Learn M2 at PE2

12 draft-vkompella-l2vpn-rvpls-00 12 RVPLS Operation - Unicast Forward on Green PW Forward to M2 on Green PW BlueGreen Red PE1 M1 PE2 M2 RPE1 RPE2 RPE3 Forward M2 to PE2

13 draft-vkompella-l2vpn-rvpls-00 13 Advantages of R-VPLS Optimized flooding Fewer pseudowires Fewer sessions Small number of labels Limited MAC learning at nPEs

14 draft-vkompella-l2vpn-rvpls-00 14 Next Steps Auto-discovery Dual homing of RPEs Cascaded regions Quantifying the scaling advantages Wait for re-charter to ask for consensus as WG draft


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