Optimizing Metro Ethernet Tim Hubbard Nortel Networks

RHK Telecom Negotiation Tips Educating the Enterprise Customer “Aggregate spending into one contract to draw more bids” Support for Triple play of Voice, Video, and Data “Include renegotiation clause in the event of a downturn” Dynamic bandwidth provisioning “Assure latest technology will be used” Ethernet-based services in high demand “Include termination clauses for poor service” Carrier-class availability and verifiable SLAs

Metro Service Platform Advanced Traffic Management Bi-directional bandwidth control Hierarchical quality of service High performance hardware implementation Global Scalability VPLS H-VPLS Carrier-class Resiliency

Traffic Management

Differentiated Services Requirements Flexible provisioning of Bandwidth: Bandwidth control: Rate shaping, policing Differentiated service delivery: Proven end-to-end Quality of Service Wire-speed Implementation of Traffic management Low latency Subscriber Services Service Provisioning SLA Monitoring Central Office

Traffic Management Illustration Incoming Traffic Measure by Classification (Coloring by Apps) Voice Video Data Policing and Remarking (Tired ingress Control) Discard or re-marked as Best Effort Best Effort To Switch Fabric High Priority Mid Priority Low Priority Priority mapped into .1p tag in vMAN header

Traffic Management Rate Shaping Gigabit throughput on any port with over-subscription Flexible provisioning of bandwidth per subscriber Bi-Directional Rate shaping Support for ingress and egress rate shaping 3 Color Rate Shaping Committed Information Rate (CIR) for guaranteed traffic Peak Rate (PR) for Burst Services Marking for non-conforming excess traffic Granular and Accurate Rate Shaping with 1 and 2 kbps increments for Ingress and Egress rate limiting; Statistics collection: CIR, PR and Dropped Bytes Reserve or limit bandwidth per application/per subscriber

Traffic Management Quality of Service Quality of Service Implementation: Bandwidth allocation per user / per application Classification “QoS” aware and unaware applications Marking DiffServ – IP QoS, 802.1p – Ethernet QoS Classify, Mark/Re-mark, Schedule Scheduling 8 hardware-based queues per port to support:

Traffic Management 1st level Per Service (VLAN) 2nd level Per Customer (VMAN) 3rd level Per Physical Port 1st level Per Service (VLAN) 2nd level Per Customer (VMAN) Cust A Cust A Cust B Cust Z BW Dynamic Allocation = Enables customer to use all bandwidth and fill it in order of service priority Each customer has the minimum (=CIR), and maximum (=PR) bandwidth setting Available resources within the customer’s total bandwidth are allocated to the other service types in a weighted fashion after priority CIR is met

High Performance Traffic Management Supports triple-play: voice, video and data Wire-speed implementation of network processing and control Non-blocking architecture delivering “zero” latency No impact on performance when features are activated: Rate shaping QoS Latency is independent of network load [Jodi] Can we get better product shots? These aren’t very clear. Maximum Latency For Voice

High Performance Traffic Management Supports triple-play: voice, video and data Scalable Multicast Service Delivery Wire-Speed forwarding of Unicast and Multicast simultaneously Adding multicast will not affect unicast forwarding Supports increasing number of user Every new receiver will not slow forwarding Every port in the network can potentially be a receiver Supports increasing number of video streams Every new transmitter will not slow forwarding Every port in the network can potentially be a transmitter No performance drop for video applications Video Conferencing Video Streaming and distribution

Global Scalability

Global Scalability Layer 2 Multiplexing QinQ and MinM End-to-end Layer 2 subscriber services Provides subscriber scalability and separation of subscriber/provider Ethernet control traffic Traditional Layer 2 VLAN service in access Preservation of customer VLAN tags VMAN or QinQ tunnel

Global Scalability Hybrid Ethernet/VPLS Metro Ethernet (vMAN) Access Ring Highly-scalable Metro Core (VPLS Switched / IP Routed) MPLS L2VPN Tunnels (For Differentiated Service Classes & Fast Path Restoration) IP Networks (Internet) & Content Providers EAPS (RFC 3619) (Ethernet Automatic Protection System) Either Ring or Mesh Architecture

“Carrier-Class” Resiliency

Availability Multi-layer Network Resiliency Layer 1 – Physical Layer 2 – Ethernet Topologies 48si Software Redundant Port Link Aggregation Ring STP RSTP EAPS Proprietary OSPF Layer 3 – Routing VRRP Internet E- BGP VLAN Aggregation Virtualisation of software threads and processing Software sparing Chassis Blade Port Physical Redundancy Port, blade, chassis Redundant Power supply Redundant Switching Fabric Hot-swappable Hitless upgrades, patching, etc Protected memory

Availability Management / Fabric Resiliency Hitless Upgrade Software and firmware can be updated without taking switch out of service Hitless Failover Switches maintain state and forwarding capabilities even in the event of software or hardware failures Existing Core Hardware protection Protects against cable, port and I/O module failure Metro Ethernet Network

Availability, Solutions for Layer-2 Resiliency IEEE 802.1w/s  IEEE 802.1D Standard - Rapid spanning tree and Multiple instance spanning tree IEEE 802.3ad Link aggregation often used as 1:1 protection switching Provides the benefit of enabling use of “sparing” or standby link when both interfaces are operating normally Dual homed software based redundant ports; Virtual Router Redundancy Protocol (VRRP): Topology intelligent Ethernet protection; Ethernet Automatic Protection System (EAPS) RFC 3619 Ethernet ring-based protection Multiple domains on a ring Multiple domains on a node VLAN can be member of multiple domains Co-exists with STP

Availability – EAPS v2 Ethernet Automatic Protection Switching Layer 2 Fast protection switching for Ethernet ring topologies EAPS - Informational RFC 3619 Fail-over < 50 Milliseconds Faster than Fast STP in a ring: Fail-over independent of number of nodes in the ring Traffic flow in both directions paths selectable per VLAN Enables Traffic Engineering Supports simple and complex ring topologies Dual attached rings Subtended rings

Metro Service Summary Advanced Traffic Management Global Scalability Bi-directional bandwidth control Hierarchical quality of service High performance hardware implementation Global Scalability QinQ at the Edge H-VPLS into the core Carrier-class Resiliency Ethernet APS RPR EoSonet/SDH

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