Optimizing Metro Ethernet

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Optimizing Metro Ethernet

• Tim Hubbard
• Nortel Networks

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RHK Telecom Negotiation TipsEducating 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

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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

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Traffic Management
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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

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Traffic Management Illustration
Incoming Traffic
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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

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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

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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 customers total bandwidth
are allocated to the other service types in a
weighted fashion after priority CIR is met
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High Performance Traffic ManagementSupports
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

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High Performance Traffic ManagementSupports
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

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Global Scalability
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Global ScalabilityLayer 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
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Global ScalabilityHybrid Ethernet/VPLS Metro
EAPS (RFC 3619) (Ethernet Automatic Protection
System)
Either Ring or Mesh Architecture
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Carrier-Class Resiliency
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AvailabilityMulti-layer Network Resiliency
Layer 1 Physical

• Physical Redundancy
• Port, blade, chassis
• Redundant Power supply
• Redundant Switching Fabric
• Hot-swappable
• Hitless upgrades, patching, etc
• Protected memory

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AvailabilityManagement / Fabric Resiliency
Hitless Upgrade Software and firmware can be
updated without taking switch out of service
Hitless FailoverSwitches maintain state and
forwarding capabilities even in the event of
software or hardware failures
Existing Core
Hardware protectionProtects against cable, port
and I/O module failure
Metro Ethernet Network
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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 11 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

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Availability EAPS v2Ethernet Automatic
Protection Switching

• Layer 2 Fast protection switching for Ethernet
  ring topologies
• EAPS - Informational RFC 3619
• Fail-over lt 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

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Metro Service Summary

• Advanced Traffic Management
• 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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End