Vach Kompella Joe Regan Ron Haberman Alcatel-Lucent Regional VPLS Vach Kompella Joe Regan Ron Haberman Alcatel-Lucent
Problem: Scaling a VPLS Flat architecture Too many end-to-end sessions Too much replication Few labels draft-vkompella-l2vpn-rvpls-00
More on Scaling Hierarchical VPLS Reduces end-to-end sessions Reduces replication Too many MACs learned at n-PE More labels draft-vkompella-l2vpn-rvpls-00
More on Scaling Use MS-PWs Reduces number of sessions Keeps MAC address learning to minimum Too much replication Many more labels draft-vkompella-l2vpn-rvpls-00
What Have We Learned Four important dimensions of scaling Sessions Replication MAC address learning Labels draft-vkompella-l2vpn-rvpls-00
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 draft-vkompella-l2vpn-rvpls-00
Regional VPLS Model Full-FIB Regional PE Half-FIB draft-vkompella-l2vpn-rvpls-00
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 draft-vkompella-l2vpn-rvpls-00
R-VPLS Operation - Forward M1 Flood M2 Learn M1 at PE1 Flood M2 PE1 Learn M1 is Blue PE2 Blue Green RPE1 RPE2 RPE3 Flood M2 M2 Red draft-vkompella-l2vpn-rvpls-00
R-VPLS Operation – Optimized Flooding Flood M2 using Flood PW Learn M1 at PE1 Flood M2 PE1 Learn M1 is Blue PE2 Blue Green RPE1 RPE2 RPE3 Flood M2 M2 Red draft-vkompella-l2vpn-rvpls-00
R-VPLS Operation - Reverse M1 Learn M2 is Green Forward M1 on Blue PW PE1 Forward M1 to PE1 Blue PE2 Green RPE1 RPE2 RPE3 Learn M2 at PE2 M2 Red draft-vkompella-l2vpn-rvpls-00
RVPLS Operation - Unicast Forward to M2 on Green PW M1 PE1 Forward on Green PW PE2 Blue Green RPE1 RPE2 RPE3 Forward M2 to PE2 M2 Red draft-vkompella-l2vpn-rvpls-00
Advantages of R-VPLS Optimized flooding Fewer pseudowires Fewer sessions Small number of labels Limited MAC learning at nPEs draft-vkompella-l2vpn-rvpls-00
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 draft-vkompella-l2vpn-rvpls-00