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Scalable & Simple Multicast Solutions… Interested?

Scalable & Simple Multicast Solutions… Interested?. Edwin C. Koehler Director – Distinguished CSE Avaya. @ Ed_Koehler. So what’s wrong with today’s multicast networks?. Today’s multicast networks are built on a protocol overlay model Typically PIM on top of OSPF

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Scalable & Simple Multicast Solutions… Interested?

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  1. Scalable & Simple Multicast Solutions…Interested? Edwin C. Koehler Director – Distinguished CSE Avaya @Ed_Koehler

  2. So what’s wrong with today’s multicast networks? • Today’s multicast networks are built on a protocol overlay model • Typically PIM on top of OSPF • RIP or static routes can be used • Protocol Independent Multicast (PIM) builds its service distribution tree by referencing the unicast routing table • Reverse Path Forwarding • This protocol overlay model works over a stateless flood and learn Ethernet switching environment • The protocol overlay creates a ‘pseudo-state’ for the multicast service • This approach leads to strong dependencies on timers and creates an environment where any network topology changes create a disruption of the service.

  3. IEEE 802.1d Flood & Learn ForwardingKnown MAC C MAC FIB MAC B = port 2 MAC A = port 1 MAC D = port 3 Port 4 802.3 Frame received MAC ‘A’ to MAC ‘B’ Port 3 A D Port 1 Port 2 B

  4. IEEE 802.1d Flood & Learn ForwardingUnknown MACs 4). FIB Table updates MAC ‘C’ to port 4 MAC FIB MAC B = port 2 MAC A = port 1 MAC D = port 3 MAC C = port ? C 3).MAC ‘C’ responds Port 4 Port 1 Port 3 A D 1). 802.3 Frame received MAC ‘A’ to MAC ‘C’ 2). MAC ‘C’ unknown = flood Port 2 B

  5. IEEE 802.1d Flood & Learn ForwardingUnknown MAC Flooding across a Virtualized Core Switch 3 Switch 1 Switch 2 MAC FIB MAC B = port 2 MAC A = port 1 MAC D = port 2 MAC C = port ? MAC FIB MAC B = port 3 MAC A = port 5 MAC D = port 2 MAC C = port ? MAC FIB MAC B = port 2 MAC A = port 1 MAC D = port 3 MAC C = port ? VLAN 100 VLAN 200 R B A C D VLAN 300 VLAN 300 Flood for MAC ‘C’ MAC ‘A’ sends a frame to MAC ‘C’. MAC ‘C’ is unknown to Switch 1 Due to the fact that MAC ‘C’ is on a traversal VLAN, all switches that are members of the VLAN need to flood for MAC ‘C’. MAC ‘C’ responds but must communicate to MAC’A’ via the router function which is running in switch 2.

  6. Legacy IP Multicast Protocol Overlay Model Source Register 1st Media Delivery Path Complex & Touchy!!!! PIM Multicast Overlay RP RPT Join IGMP Join IGMP Snooping IGMP Snooping RPT Prune DR DR SPT Join IGMP Join Source begins to send media (2nd)Shortest Media Delivery Path media Source Receiver OSPF Unicast Overlay R L2 R R L2 Ethernet Switching Infrastructure (Stateless)

  7. Which Fabric Technology is the Answer? • That all depends on how you qualify the question… Avaya Extensions Avaya Fabric Connect Application Extensions • Aspirational functionality • But it requires: • BGP • LDP • RSVP-TE • Draft-Rosen • VPLS • Single logical Switch / fault domain • 100m distance limitation • VLAN-based virtualization • Root Bridge –dependent • Large flooding domain • VLAN-based virtualization • Abstraction • Service-based virtualization • Orchestration-ready • Layer 3 awareness • Unicast & Multicast support • Application-driven extensibility • Baseline redundancy • Root Bridge –dependent • Not shortest path IETF MPLS L3 Multicast Virtualization L3 Unicast Virtualization IEEE SPB L2 Multi-Site Virtualization IETF TRILL Cisco FabricPath Brocade VCS Juniper QFabric L2 Single-Site Virtualization L2 Multi-Pathing STP L2 Loop-free Topology

  8. Native Multicast over Shortest Path Bridging • IEEE 802.1aq “Shortest Path Bridging” provides a dramatic evolution to the Ethernet Forwarding Control Plane (where SPBM stands for SPB MAC-in-MAC) • Stateful Topology • Use of IS-IS L2PDU and extended Type, Lengthm, Value fields • Universal Forwarding Label • IEEE 802.1ah “MAC-in-MAC” encapsulation (B-MAC) • Provisioned Service Paths • Individual Service Identifiers (I-SID) • These three component technologies at a high level comprise the major evolution offered by SPBM. • The end result is a very stateful and deterministic forwarding plane for Next Generation Ethernet

  9. Creating a Link State Topologyusing IS-IS Topology IP Reachability Provisioned Services SPB Node 0.00.05 IS-IS L2 Hello’s TLV’s SPB Node 0.00.04 SPB Node 0.00.01* Dyjkstra SPT from the perspective of SPB node 0.00.01 SPB Node 0.00.06 SPB Node 0.00.03 SPB Node 0.00.02 * IEEE SPB ‘Nick Name’

  10. The Use of IEEE 802.1ah (MAC-in-MAC) with ISIS SPB Demarcation Point Normal 802.3 Frame 802.1 ah Frame DA SA DA SA C-MAC Frame B-MAC Frame SPB Node 0.00.05 C-MAC Frame Normal 802.3 Ethernet Switch All frame forwarding in the SPB Domain occurs by the DA/SA information in the B-MAC (C-MAC info is transferred but NOT propagated in the SPB Core!) SPB Node 0.00.04 SPB Node 0.00.01 SPB Node 0.00.06 SPB Node 0.00.03 SPB Node 0.00.02 Dyjkstra from the perspective of… 0.00.01 0.00.02 0.00.03 0.00.04 0.00.05 0.00.06 DA SA C-MAC Frame Normal 802.3 Ethernet Switch

  11. IEEE 802.1aq “Shortest Path Bridging” and it’s use of 802.1ah MAC-in-MAC “Provider Based Bridging” Increase in Virtualization C-SA = Customer Source MAC C-DA = Customer Destination MAC C-TAG = Customer TAG TPID = Tag Protocol IDentifier S-TAG = Service TAG I-TAG = Service Instance TAG I-SID = Service ID B-TAG = Backbone TAG B-DA = Backbone DA B-SA = Backbone SA 4096 Service instances 4096x4096 Service instances 16,777,215 Service instances!

  12. Flexible Network Services • Mapping of a Layer 2 VLAN into a Virtual Service Network delivering seamless Layer 2 extensions • Layer 2 Virtual Service Network Virtual Service Network Virtual Service Network Virtual Service Network • Mapping of a Layer 3 VRF into a Virtual Service Network delivering seamless Layer 3 extensions • Layer 3 Virtual Service Network Virtual Service Network • Enhancing 802.1aq by offering a policy-based Layer 3 internetworking capability of multiple Virtual Service Networks • Inter-VSN Routing • Native IP routing across the Virtual Service Fabric without the need for Virtual Service Networks or any additional IGP • IP Shortcuts VLAN VLAN

  13. I-SID in Hexadecimal NICK-NAME & “3” Constrained Multicast in SPB Used to Service “Flood & Learn” ARP 10.10.10.11 10.10.10.0/24 IS-IS L2 Hello’s TLV’s SPB Node 0.00.05 Topology IP Reachability Provisioned Services VLAN 1000 Here I am! 10.10.10.0/24 VLAN 1000 SPB Node 0.00.04 SPB Node 0.00.01 10.10.10.0/24 IP 10.10.10.10 VLAN 1000 Dyjkstra SPT for I-SID 1000 from the perspective of SPB node 0.00.01 SPB Node 0.00.06 SPB Node 0.00.03 IP 10.10.10.11 SPB Node 0.00.02 Example : Nickname = 0.00.01 , I-SID = 1000 (0x3e8) Source & RPF are known! BMAC Dest. Multicast Address = 03:00:01:00:03:e8

  14. True L3 Multicast Delivered‘Natively’ over IEEE 802.1aq Information on I-SID 16,220,100 Relayed to every SPB node via IS-IS TLV’s IGMP Snooping IP 10.10.10.12 Sending video to 239.1.1.1 SPB Node 0.00.05 10.10.10.0/24 VLAN 1000 IGMP Snooping I-SID 1000 We are both interested in 239.1.1.1 10.10.10.0/24 VLAN 1000 SPB Node 0.00.04 SPB Node 0.00.01 10.10.10.0/24 IP 10.10.10.10 Crossing L3 Boundaries without multicast routed interfaces! VLAN 1000 IGMP Snooping SPB Node 0.00.06 IP 10.10.10.11 SPB Node 0.00.02 SPB Node 0.00.03 Dynamic I-SID 16,220,100 Set up to establish multicast service via IS-IS LSDB 10.10.11.0/24 IGMP Snooping I also am interested in 239.1.1.1 VLAN 100 IP 10.10.11.10

  15. True L3 Multicast Delivered Inside an IP VPN Service!! IP 10.10.130.10 Information on I-SID 16,500,000 Relayed to every SPB node via IS-IS TLV’s IGMP Snooping SPB Node 0.00.05 Sending video to 239.1.1.1 10.10.130.0/24 VLAN 300 VRF IGMP Snooping I-SID 5100 We are both interested in 239.1.1.1 10.10.140.0/24 VRF VLAN 400 SPB Node 0.00.04 SPB Node 0.00.01 10.10.120.0/24 IP 10.10.140.10 VLAN 200 VRF IGMP Snooping SPB Node 0.00.06 IP 10.10.120.10 SPB Node 0.00.02 SPB Node 0.00.03 10.10.150.0/24 Dynamic I-SID 16,500,000 Set up to establish multicast service via IS-IS LSDB IGMP Snooping I also am interested in 239.1.1.1 VRF VLAN 500 IP 10.10.150.10

  16. Why SPB with Multicast? • Complexity • With today‘s legacy protocols (PIM) it is very complicated to build and operate an IP Multicast routed network • Scalability • PIM networks don‘t scale to the levels the new apps are requiring it to. • Convergence • Multicast convergence in case of failure in a PIM network is in the 10s of seconds or even minutes and not sub-second as L2 network protocols • “Multi-tenancy” • For multi-tenant applications new scalable IP-MC model was required • Dependancy on Unicast Routing Table • This model does not optimal for convergence and design reasons.

  17. Applications • Well known Applications • Surveillance • TV, Video Distribution • PC Image Distribution • Ticker Distribution (Trading) • Image Distribution • New Applications • Data Center IP overlay models such as • VXLAN, NVGRE,...

  18. Deployment Scenario Video Surveillance(IP Camera Deployment - Transportation, Airports, Government...) Many to Few Routing Instance! Senders VLAN Senders VLAN SPB L3VSN orGRT Shortcuts Senders VLAN VLAN Video on demand Receiver Screens(IP Multicast from cameras) VLAN Senders VLAN Senders VLAN Video Recorders(IP unicast from cameras) • SMLT BEBs in the Data Center • Receivers are only here IGMP Be sure to stop and see Pelco’s Endura Multicast Video Surveillance Solutions running onAvaya’s Fabric Connect Native Multicast!

  19. TV-, Video-, Ticker-, Image Distribution Routing Instance! Few to Many Receivers VLAN Maybe someReceivers Receivers VLAN SPB L3VSN orGRT Shortcuts VLAN Receivers VLAN VLAN Sender Receivers VLAN VLAN Receivers • Many of these BEBs (BEBs might be doing SMLT) • Only Receivers behind them • SMLT BEBs in the Data Center

  20. Multicast in Data Centers L2VSN L2VSN TOR Receivers L2VSN 8600 VLAN L2VSN SPB Receivers VLAN Receivers VLAN VLAN VLAN Sender Receiver Senders VLAN VLAN IGMP VLAN Receivers IGMP SPB • Querier recognition and drawing all streams towards querier (wildcard querier join)

  21. Multi-Tenant IP Multicast Usage to Support VXLAN Multicast Shortest Path Distribution Trees Routing Instance! L3VSN L3VSN Green DC VLAN SPB IP MulticastGreen only L3VSN VLAN Red DC VLAN IP MulticastRed only VLAN Yellow DC VLAN VLAN IP MulticastYellow only Multi-tenant Data Center • Green and Red and Yellow users cannot communicate • Each has a totally separate multicast environment

  22. Multi-Tenant IP Multicast Routing Instance! Receivers VLAN L3VSN Receivers VLAN SPB IP Unicast ServerGreen users only VLAN Receivers L3VSN VLAN IP Unicast ServerRed users only VLAN Receivers VLAN VLAN Receivers Multi-tenant Data Center • Green and Red users cannot communicate • But they both need to receive Multicast stream from Shared Server

  23. What Were the Requirements to Build SPB with IP Multicast Support? • Simplicity • Configuring – Infrastructure • Provisioning – New services • Operations • Stream monitoring – end to end transparency • Flexibility • No topology Dependency, Support Rings, Meshes... • Scalability • Scale to the 10‘s of thousands of streams • Convergence • Sub 200ms failover times • Interoperability • With PIM/IGMP • Virtualization Support • Multi-tenancy • Hosted Data Center support

  24. @Ed_Koehler

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