"The Virtual Network over TRILL: Private VLANs in open-source". Thomas Stocking, Gandi.net
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In this talk, Thomas will present Virtual Network over TRILL (VNT), a TRILL-based multi-tenant network architecture for virtualized data center networks. Through the TRILL protocol, this architecture achieves the best of both layers (bridging and routing), thus building a large-scale layer-2 network, while ensuring scalability, efficiency, fault-tolerance and simplified management. This architecture integrates the VNT solution, enabling the creation of large numbers of logical networks or Private VLANs within a virtualized data center. The complete implementation of our solution is currently deployed and running in the Gandi cloud infrastructure. Gandi plans to release the code for this solution as open source.
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"The Virtual Network over TRILL: Private VLANs in open-source". Thomas Stocking, Gandi.net
- 1. 1
- 2. 2 VNT: Virtual Network over TRILL What is VNT? Why did we make it? Who can use it? Thomas Stocking COO Gandi US Inc.
- 3. 3 The Cloud provider perspective Node Node Node Node Node Node Background
- 4. 4 The Cloud provider perspective Node VM VM VM VM VM VM VM VM VM Node Node Node Node Node VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM Background
- 5. 5 The Cloud provider perspective Node VM VM VM VM VM VM VM VM VM Node Node Node Node Node VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM Background
- 6. 6 The Cloud provider perspective Node VM VM VM VM VM VM VM VM VM Node Node Node Node Node VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM Background
- 7. 7 Large scale mul4-‐tenancy LARGE SCALE Mul4-‐Tennacy
- 8. 8 Large scale mul4-‐tenancy StorageServers Access layer Aggrega4on Layer Core Layer Internet Customers VM VM VM VM VM VM VM VM VM Cloud Data Center View Why did we make it?
- 9. 9 Large scale mul4-‐tenancy Customer Logical View: Private VLAN VM L2-‐Segment Customer C VM VM L2-‐Segment Customer B VM VM L2-‐Segment Customer A VM VM VM VM
- 10. 10 Large scale mul4-‐tenancy Customer Logical View VM L2-‐Segment Customer C VM VM L2-‐Segment Customer B VM VM L2-‐Segment Customer A VM VM VM VM
- 11. 11 q Provide large-‐scale mul1-‐tenancy q Hidden aspects at Layer 2: Ø Seamless VM mobility Ø Management complexity Ø Layer 2 core scaling issues Ø Fault tolerance Ø VLAN scalability Challenge
- 12. 12 q What is VNT ? TRILL + VNI VNT : Virtual Network over TRILL Node VM VM VM VM VM VM VM VM VM TRILL VNI VNI VNI VNI VNI VNI
- 13. 13 q What is TRILL ? • TRILL = Transparent Interconnec4on with Lot of Links (RFC6325) TRILL combines the best of Layer 2 and Layer 3 VNT : Virtual Network over TRILL RBridge
- 14. 14 q What is VNI ? • Virtual network iden4fier VLAN**2 VNT : Virtual Network over TRILL
- 15. 15 q What is VNI ? • Virtual network iden4fier VLAN**2 VNT : Virtual Network over TRILL
- 16. 16 VNT Frame Format VNT Encapsula4on Original Ethernet Frame Outer Des4na4on Mac Address Outer Source Mac Address Op4onal Outer IEEE 802.1Q TRILL Header VNT Header Extensions Inner Des4na4on Mac Address Inner Source Mac Address Op4onal Inner IEEE 802.1Q Original Ethernet Payload CRC Ensures Layer 2 switching Reduces impact on ToR MAC Table Transport Vlan Ensures a Layer 2 rou4ng based on Rbridge Nickname Backwards compa4bility LAN segments to scale up to 16 million Broadcast and flooding based on VNI Egress Rbridge Nickname Ingress Rbridge Nickname Cri4cal Op4on TLV VNI Tag (24 bits)
- 17. 17 VNT Frame Format VNT Encapsula4on Original Ethernet Frame Outer Des4na4on Mac Address Outer Source Mac Address Op4onal Outer IEEE 802.1Q TRILL Header VNT Header Extensions Inner Des4na4on Mac Address Inner Source Mac Address Op4onal Inner IEEE 802.1Q Original Ethernet Payload CRC Ensures Layer 2 switching Reduces impact on ToR MAC Table Transport Vlan Ensures a Layer 2 rou4ng based on Rbridge Nickname Backwards compa4bility LAN segments to scale up to 16 million Broadcast and flooding based on VNI Egress Rbridge Nickname Ingress Rbridge Nickname Cri4cal Op4on TLV VNI Tag (24 bits)
- 18. 18 Challenge q Provide large-‐scale mul1-‐tenancy q Hidden aspects at Layer 2: Ø Seamless VM mobility Ø Management complexity Ø Layer 2 core scaling issues Ø Fault tolerance Ø VLAN scalability
- 19. 19 Challenge
- 20. 20 Construc4on VNT Topology Trees Dest-‐Nickname Port Nexthop Mac TRILL Forwarding Table TRILL Mul4cast Tree n1 n1 n3 n4 n5 n8 n7 n6 n1 n2 i1 i1 i2 i2 i1 i2 i1 i2 i1 i2 i1 i3 i3 i3 i2 i2 i1 i2 i1 i3
- 21. 21 Construc4on VNT Topology Trees Dest-‐Nickname Port Nexthop Mac n8 i1 -‐ n5 i3 -‐ n2 i2 -‐ n5 n2 n8 n1 TRILL Forwarding Table TRILL Mul4cast Tree n1 n3 n4 n5 n8 n7 n6 n1 n2 i1 i1 i2 i2 i1 i2 i1 i2 i1 i2 i1 i3 i3 i3 i2 i2 i1 i2 i1 i3
- 22. 22 Construc4on VNT Topology Trees n3 n4 n5 n8 n7 n6 n1 n2 i1 i1 i2 i2 i1 i2 i1 i2 i1 i2 i1 i3 i3 i3 i2 i2 i1 i2 i1 i3 TRILL Mul4cast Tree TRILL Forwarding Table Dest-‐Nickname Port Nexthop Mac n8 i1 -‐ n5 i3 -‐ n2 i2 -‐ n7 i1 MAC-‐n8 n6 i3 MAC-‐n5 n4 i3 MAC-‐n5 n3 i2 MAC-‐n2 n5 n2 n8 n1 n7 n6 n4 n3 n1
- 23. 23 Construc4on VNT Topology Trees TRILL Mul4cast Tree TRILL Forwarding Table Dest-‐Nickname Port Nexthop Mac n8 i1 -‐ n5 i3 -‐ n2 i2 -‐ n7 i1 MAC-‐n8 n6 i3 MAC-‐n5 n4 i3 MAC-‐n5 n3 i2 MAC-‐n2 n5 n2 n8 n1 n7 n6 n4 n3 Convergence = All RBridges have complete forwarding tables n1 n3 n4 n5 n8 n7 n6 n1 n2 i1 i1 i2 i2 i1 i2 i1 i2 i1 i2 i1 i3 i3 i3 i2 i2 i1 i2 i1 i3
- 24. 24 VNI Propaga4on Process VNI Supported VNI Forwarded VNI Unknown VNI Discovered add VNI del VNI add VNI VNI on two port VNI on only one port VNI on only one port VNI on any port add VNI
- 25. 25 VNI Propaga4on Process VNI Supported VNI Forwarded VNI Unknown VNI Discovered add VNI del VNI add VNI VNI on two port VNI on only one port VNI on only one port VNI on any port add VNI Convergence = All RBridges know all VNIs
- 26. 26 Using TRILL Physical Topology Mul4cast Tree ARP Flooding n5 n2 n8 n3 n7 n4 n6 n1 3 4 5 8 7 6 1 2 A B Root_tree n5 n2 n8 n3 n7 n4 n6 n1 VNT Topology Trees
- 27. 27 Physical Topology Mul4cast Tree ARP Flooding n5 n2 n8 n3 n7 n4 n6 n1 3 4 5 8 7 6 1 2 A B Root_tree n5 n2 n8 n3 n7 n4 n6 n1 Using TRILL VNT Topology Trees
- 28. 28 Physical Topology Mul4cast Tree ARP Flooding n5 n2 n8 n3 n7 n4 n6 n1 3 4 5 8 7 6 1 2 A B Root_tree n5 n2 n8 n3 n7 n4 n6 n1 Using TRILL Using VNT 3 4 5 8 7 6 1 2 A –Vni1 Root_tree n5 n2 n8 n3 n7 n4 n6 n1 VNT Topology Trees
- 29. 29 Physical Topology Mul4cast Tree ARP Flooding n5 n2 n8 n3 n7 n4 n6 n1 3 4 5 8 7 6 1 2 A B Root_tree n5 n2 n8 n3 n7 n4 n6 n1 Using TRILL Using VNT 3 4 5 8 7 6 1 2 A –Vni1 Root_tree n5 n2 n8 n3 n7 n4 n6 n1 B-‐Vni1 n5 n2 n6 n1 VNT Topology Trees
- 30. 30 VNT Topology Trees Physical Topology Mul4cast Tree ARP Flooding n5 n2 n8 n3 n7 n4 n6 n1 3 4 5 8 7 6 1 2 A B Root_tree n5 n2 n8 n3 n7 n4 n6 n1 Using TRILL Using VNT 3 4 5 8 7 6 1 2 A –Vni1 Root_tree n5 n2 n8 n3 n7 n4 n6 n1 B-‐Vni1 n5 n2 n6 n1
- 31. 31 Experimental Analysis: PROVE IT Xkcd: http://xkcd.com/373/
- 32. 32 Experimental Analysis: Data Plane Evalua4on: MAC Address entries NumberofMACaddressesin table
- 33. 33 Experimental Analysis: Control Plane Evalua4on: TRILL • 30 seconds for LSP period
- 34. 34 Experimental Analysis: Control Plane Evalua4on: VNI
- 35. 35 Experimental Analysis: Basic System Performance Throughput Latency Layer 2 TRILL VNT Layer 2 TRILL VNT Throughput(Gbits) Delay(ms)
- 36. 36 Backwards compa4bility StorageServers Access Aggrega4on Layer Core Layer Internet VNT on nodes Layer 2 Switches
- 37. 37 Backwards compa4bility StorageServers Access Aggrega4on Layer Core Layer Internet VNT on nodes TRILL Switches
- 38. 38 Conclusion q VNT can provide large-‐scale mul1-‐tenancy Ø Solves Layer 2 scaling issues Ø Solves VLAN exhaus1on Ø Zero Configura1on Ø Zero Upgrade
- 39. 39 Conclusion Open source release TRILL: Download now! VNT: Coming soon…