information data reliability with the xgbe wan phy

January 17, 2000 802.3 HSSG (P802.3ae) 1

Information Data ReliabilityWith The

XGbE WAN PHY

Roy BynumMCI WorldCom

January 17, 2000 802.3 HSSG (P802.3ae) 2

GbE: Native IP Over Optical Transport95% of IP Data originates on 802.3GbE is direct Optical 802.3

GbE is more reliable than Packet Over SONET (POS)Lower Data Loss: >1% Vs. ~3% Faster Traffic Restoration: ~1.5ms Vs. ~500ms

(A proprietary version of POS: ~2ms)Active Subscription Control:

Bandwidth reduction = slower data transferGbE: no data loss because of 801.dPOS: data loss and retransmission

January 17, 2000 802.3 HSSG (P802.3ae) 3

Data Communications Technology Evaluation Lab

802.3 L2 Switches: Store & Forward and Cut Through802.3 L2 / IP L3 Switches: RIP/OSPF/BGP RoutingIP Routers: Legacy RIP/OSPF/BGP POS RoutingL3 Switches: High Speed OSPF/BGP POS RoutingATM: IP/LANe Over ATM PVCs/SVCsData Generation/Analysis: - 802.3/IP/UDP,TCP

- POS/IP/UDP,TCPTransport: Active DWDM, Optical Switches, 802.3

Over SONET, Standard SONET OC3/OC12/OC48/OC192

January 17, 2000 802.3 HSSG (P802.3ae) 4

Evaluation Test Configurations:Data Loss: Traffic Restoration After Optical/SONET

Network RestorationData Loss: Traffic Characteristics During Overload/

Bandwidth Constraint ConditionsDifferentiated Services: Priority Queuing Over Constrained

Network LinksService Reliability: Link Aggregation To Prevent IP

ConvergenceVirtual Segmentation: Simplified Routing Over Mesh

Circuit Networks

January 17, 2000 802.3 HSSG (P802.3ae) 5

Data GenerationTest Set

Full Duplex 100BT

Full Duplex Gigabit Ethernet

Optical Working Channel

Optical Protection Channel

L2/L3 Data SwitchDevices Under Test

Metro DWDM with Protection Switchingor OCCS System

Test Data Generation SystemRunning Packet Loss Test

Test Configuration To Evaluate Traffic RestorationOver Active Optical Network

January 17, 2000 802.3 HSSG (P802.3ae) 6



Test Data Generater

Full Duplex 100BT


OpticalWorking Channel

Test Data Generater

Test Data Generation SystemsRunning Packet Loss TestWith active flow control responce

Test Data Generation SystemsRunning Packet Loss TestWith active flow control responce

L2/L3 Data SwitchDevices Under TestL2/L3 Data SwitchDevices Under TestL2/L3 Data SwitchDevices Under Test

Test Configuration To Evaluate Traffic Subscription ControlBy Means Of Flow Control Over Active Optical Network

January 17, 2000 802.3 HSSG (P802.3ae) 7



Test Data Generater

Full Duplex 100BT


OpticalWorking Channel

Test Data Generater

Test Data Generation SystemsRunning Packet Loss TestConfigured as low priority trafficWith active flow control responce

Test Data Generation SystemsRunning Packet Loss TestConfigured as low priority trafficWith active flow control responce


Test Data Generater

Full Duplex 100BT

Test Data Generation SystemsRunning Packet Loss TestConfigured as high priority trafficWith active flow control responce

Test Configuration To Evaluate Differentiated ServicesBy Means Of Priority Queuing Over Active Optical Network

January 17, 2000 802.3 HSSG (P802.3ae) 8

Test Data Generater

Full Duplex 100BT


Test Data Generater

Test Data Generation Systems Running PacketLoss Test Configured as low priority trafficWith active flow control responce


Test Data Generater

Full Duplex 100BTTest Data Generation Systems Running PacketLoss Test Configured as low priority trafficWith active flow control responce

Test Data Generation Systems Running PacketLoss Test Configured as high priority trafficWith active flow control responce


Test Configuration To EvaluateTraffic Restoration Over Active Optical Network

Using 4X Diverse Aggregated Links

January 17, 2000 802.3 HSSG (P802.3ae) 9

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

L2/L3Switch

Intranet

LogicalVirtual Segments

Intranet


Intranet


Intranet


IntranetLogical

Virtual Segments

IntranetLogical

Virtual Segments

InternetLogical

Virtual Segments

Test ConfigurationTo Evaluate

Virtual Segmentation

January 17, 2000 802.3 HSSG (P802.3ae) 10

Internet Protocol (IP)

802.3Ethernet

Over Optical(Gigabit

Ethernet)(GbE)

8B/10B

Optical Wavelengths (DWDM) (OCCS)

LLC2

ATM

HDLC/PPPPacket OverSONET/SDH

(POS)

802.3Ethernet

OverSONET/SDH

(EOS)(10GbE)

Unknown

SONET/SDHDigital

Wrapper

Point-to-Point

Protocol(PPP)

TDM (DS3/DS1/DS0)

SAR

MPLS NativeOptical

Data(ESCONFICONETC.)

Native Optical TransportTraditionalTelepony

Private Line

Packet Over

SONET

ATM LANeTransparent

LANService

NativeLAN

Extension/Transport

MPLS MPLS

IP Over DWDM Networking Protocol Stack

January 17, 2000 802.3 HSSG (P802.3ae) 11

OpticalSignallingProcesses

PhysicalLayer

ProcessCommunications

Data LinkLayer


NetworkLayer


Restored Optical Signalling

Restored SONET Communications

Restored HDLC/PPP Communications

Restored IP Communications

Restored TCPCommunications

TransmissionLayer


ApplicationData


Restored IPApplicationsData Traffic

SONETTraffic

RestorationTime

( OpticalRestoration

+ 375us)

Actual Application Traffic Restoration Time is Dependant on the Restoration of

ALL of the Other Communications Layers~ 500ms to Seconds

OpticalRestoration

Time<50ms

Fiber Cut

Optical Signal Switched to Protection Fiber by OCCS

HDLC/PPPLink

SetupHandshake

IP PathSetup

Handshake

Trans. &SessionSetup

Handshake

POS Traffic Restoration Is Limited ByMultiple Layers Of Handshaking

January 17, 2000 802.3 HSSG (P802.3ae) 12

OpticalSignalingProcesses

PhysicalLayer


Data LinkLayer


NetworkLayer


Restored Optical Signaling

8B10B Optical Encoding Signaling Communications

Restored802.3 Ethernet

Communications

RestoredIP

Communications


TransmissionLayer


ApplicationData



8B10BOptical

SignalingRestoration

Time( Optical

Restoration+ ~600us)

Actual Application Traffic Restoration Time is Dependent on the Restoration of

ALL of the Other Communications Layers~ 2 - 20ms over Optical Restoration time

OpticalRestoration

Time<50ms

Fiber Cut


802.3 EthernetLogical Link Control

Recovery~ < 600us after

8B10B Recovery

IP PathSetup

Handshake


Handshake

GbE Traffic Restoration IndicativeOf Native Optical Data Communications

January 17, 2000 802.3 HSSG (P802.3ae) 13

OpticalSignalingProcesses

PhysicalLayer


Data LinkLayer


NetworkLayer


Restored Optical Signaling

RestoredSONET/SDH Framing Signaling

Communications

RestoredP802.3ae Ethernet

Communications

RestoredIP

Communications


TransmissionLayer


ApplicationData



SONET/SDHFrame

SignalingRestoration

Time( Optical

Restoration+ ~375us)

Actual Application Traffic Restoration Time is Dependent on the Restoration of

ALL of the Other Communications Layers~ 1 - 20ms over Optical Restoration time

OpticalRestoration

Time<50ms

Fiber Cut


802.3 Ethernet LogicalLink Control Recovery

~ 250us after SONET Recovery

IP PathSetup

Handshake


Handshake

P802.3ae WAN PHY Traffic RestorationCan Be As Little As 625us

January 17, 2000 802.3 HSSG (P802.3ae) 14

XGbE (P802.3ae) Will BeThe Most Reliable WAN Protocol To Date

XGbE WAN Will Provide:Very Fast Traffic Restoration Times

Direct Linkage To SONET/Optical RestorationBandwidth Overload Protection

Through Active Flow ControlDeterministic Latency And Differentiated Services

Through Priority QueuingFault Tolerance and Resiliency

Through Link AggregationSimplicity Of Routing Configuration

Through Virtual Segmentation

information data reliability with the xgbe wan phy

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