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Delivering Ethernet Services to the Research & Education Community
© 2007 ADVA Optical Networking. All rights reserved. Participants Moderator: Brian Cashman Network Planning Engineer Internet2 Presenter: Fred Ellefson VP Business Development ADVA Optical Networking
© 2007 ADVA Optical Networking. All rights reserved. Agenda Introduction Advances in Operations, Administration & Maintenance (OAM) standards OAM, Ethernet access and demarcation
© 2007 ADVA Optical Networking. All rights reserved. Ethernet Service Evolution Early Adopters Mass Market Carrier-grade Ethernet is driving a mass market shift to Ethernet OAM is a critical part of a carrier-grade Ethernet offering, without it, many users will stick with their current WAN technologies Carrier-grade Ethernet is driving a mass market shift to Ethernet OAM is a critical part of a carrier-grade Ethernet offering, without it, many users will stick with their current WAN technologies Source: RHK 2005 North American Ethernet Service Market
© 2007 ADVA Optical Networking. All rights reserved. Poll Question What is holding back WAN Ethernet deployments in your network? A.Availability of backbone Ethernet capacity B.Availability of regional Ethernet capacity (or fiber) C.Ability to manage Ethernet in WAN D.Preference for another protocol
© 2007 ADVA Optical Networking. All rights reserved. Ethernet OAM Standards Overview TMF814 – EMS to NMS Model Y.1730 – Ethernet OAM Req Y.1731 – OAM Mechanisms G.8031 – Protection Y.17ethqos – QoS Y.ethperf - Performance MEF 7 – EMS-NMS Info Model MEF 15 – NE Management Req MEF 17 - OAM Req & Framework MEF 16 – Ethernet Local Management Interface Performance Monitoring 802.3ah – EFM OAM 802.1ag – CFM 802.1aj - TPMR 802.1AB – Discovery 802.1ap – VLAN MIB Ethernet OAM TMF Standards Body ITU MEF IEEE RFC-2544 – Benchmarking Methodology for Network Interconnect Devices RFC-2819 – Remote Monitoring (RMON Etherstats) IETF
© 2007 ADVA Optical Networking. All rights reserved. Ethernet OAM Standards IEEE 802.3ah MEF & ITU Y.1731 Access Link OAM IEEE 802.1ag, MEF & ITU Y.1731 Connectivity Layer OAM Service Layer OAM (UNI to UNI) Media Cnvrtr Carrier Edge Media Cnvrtr 100FX Customer Equipment Customer Equipment R&E Backbone NW UNI
© 2007 ADVA Optical Networking. All rights reserved. Ethernet OAM Standards Services and Performance (ITU Y.1731/MEF) Basic Connectivity (IEEE 802.1ag,ITU) Transport/Link (802.3ah EFM) Discovery Continuity check (keep alive) Continuity checkRemote failure indication: Dying gasp, link fault & critical event Loopback (non-intrusive and intrusive) LoopbackRemote, local loopback AIS/RDI/Test Fault isolation Link Trace Performance monitoring with threshold alarms Performance management Status monitoring
© 2007 ADVA Optical Networking. All rights reserved. IEEE 802.3ah Ethernet in First Mile EFM standard completed in mid 2004 First Ethernet OAM standard completed Focused on point to point Ethernet link OAM Does not propagate beyond the link Discovery Remote failure indication Dying gasp, link fault & critical event Remote loopback Performance monitoring and threshold crossing alarms Ethernet OAM shares BW with data payload Utilizes a slow protocol limited to 10 packets per second OAMPDUs identified by MAC address and Ethernet Length/Type/subtype field Uses a protocol sub layer between physical and Data link layers
© 2007 ADVA Optical Networking. All rights reserved. IEEE 802.1ag Connectivity Fault Management (CFM) Partitions network into hierarchical administrative domains Basic connectivity checking and troubleshooting across any domain, and across multiple domains at the same time Continuity checks – proactive service verification Loopbacks – layer 2 version similar to IP Ping Link trace – layer 2 version similar to Traceroute Recently completed standard R&E Backbone NW Operator Customer End-to-End Metrics Provider End-to-End Metrics Operator Metrics
© 2007 ADVA Optical Networking. All rights reserved. ITU Y.1731 EthOAM – Service Level OAM Builds on 802.1ag Discovery Continuity check (keep alive) Loopback (non-intrusive and intrusive) Defect detection/localization Performance verification Link trace AIS/RDI/Test – out of service verification Performance management for SLA verification Frame loss Frame delay Frame delay variation Others (errored frame seconds, service status (up/down), frame throughput, etc.) Also recently completed
© 2007 ADVA Optical Networking. All rights reserved. Test/Monitoring Standards Metro Ethernet Forum (MEF) Recommended key parameters for SLAs – MEF 10 Service availability, frames lost, frame delay, frame jitter Defined the what, not the how RFC-2544 Out of service testing – followed by most test sets, some demarc devices Frame loss, latency, throughput, back to back, reset Y.1731 Focused on end to end service (WAN) RFC RMON Etherstats Monitoring of local performance (e.g. node or LAN)
© 2007 ADVA Optical Networking. All rights reserved. Remote Monitoring (RMON) RFC-2819 Remote monitoring (RMON) provides a frame work of related standards for performance monitoring Introduces concept of probe or monitor Initially stand-alone, now integrated into many devices Completed 2000 RMON-1 (RFC-2819) is focused on link layer (layer 2) monitoring Local performance monitoring (vs. end to end) Collected on port and EVC (VLAN) basis Includes parameters such as: Packet counts, multi-cast pkts, CRC errors, pkt size, collisions, jabber, etc. RMON designed for enterprise LAN applications
© 2007 ADVA Optical Networking. All rights reserved. RFC-2544 Testing Suite of tests for verifying Ethernet equipment Now being used for Ethernet services Test suite is made up of: Throughput Latency Frame loss Back to back Reset Results generally presented in graphical form Each test is performed multiple times with different frame sizes MEF SLA parameters Benchmarking Methodology for Network Interconnect Devices
© 2007 ADVA Optical Networking. All rights reserved. Poll Question Which test/management protocol do you currently use to manage Ethernet in WAN? A.RFC-2544 – Benchmarking Testing B. RFC-2819 – RMON C.802.1ag/Y.1731 – CFM/EthOAM D.802.3ah – EFM E.Other
© 2007 ADVA Optical Networking. All rights reserved. What is Ethernet Demarcation? UNI Media Converter Carrier Edge Media Converter 100FX Customer Equipment Customer Equipment Ethernet Demarcation Necessary at carrier to customer interface (UNI) Provides separation between carrier WAN and enterprise LAN Enables testing and monitoring of both LAN and WAN Incorporates service UNI for traffic shaping & NID/NIU for OAM 100FX 100BT Demarcation Device UNI Carrier WAN Network Customer LAN Network Customer LAN Network R&E Backbone NW
© 2007 ADVA Optical Networking. All rights reserved. Demarcation Device Usage For service providers in the audience, what are the three most important uses for Ethernet demarc points in your networks? Light Reading Webinar 8/2006 Demarcation devices used by more than 50% of Ethernet carriers
© 2007 ADVA Optical Networking. All rights reserved. Ethernet Demarcation Device Functionality Three key functions for Ethernet demarcation Ethernet NID (Network Interface Device) or Network Termination Equipment (NTE) Link/Service layer Ethernet OAM – 802.3ah/802.1ag Ethernet Service UNI (User Network Interface) Service layer policing and definition – MEF/ITU Integrated first mile transport Extend Ethernet reach over Fiber (GbE/100FX), EoTDM (OC-n/STM-n, DS3/E3 or DS1/E1) or copper (EoDSL) 10/100BT Customer Premise Demarcation Device UNI, NID/NTE & Transport R&E Backbone NW Carrier NetworkCustomer Network 100FX/GbE, EoTDM or EoCopper Cust. Eqpmnt. Demarcation
© 2007 ADVA Optical Networking. All rights reserved. User Network Interface (UNI) 10/100BT UNI R&E Backbone NW EoX Required anytime rate limiting is performed Eg EoTDM, shared uplinks, multiple services, etc. MEF based bandwidth profile on port/VLAN/Ethernet Virtual Circuit (EVC) basis CIR/EIR – Committed/Excess Information Rate CBS/EBS – Committed/Excess Burst Size Traffic classification/priority based on TOS/DSCP/802.1P/802.1Q/etc. Low latency handling of VoIP/video services Ethernet Virtual Circuit (EVC) or VLAN support 802.1Q & Q-in-Q - Add, remove, swap and stacking of VLAN tags 500M100M Customer Premise ADM, Modem or Media converter Customer Equipment
© 2007 ADVA Optical Networking. All rights reserved. R&E Backbone NW Network Interface Device (NID) 10/100BT EoX Carrier visibility of customer network Carrier visibility of carrier network NID or NTE required at customer handoff for OAM Analogous to smartjack, CSU/DSU or NTE for frame relay Link OAM (EFM - IEEE 802.3ah) is necessary but not sufficient Performance monitoring and threshold crossing alarms Remote failure indication - Dying gasp, link fault & critical event Remote loopback (Port) Services OAM (ITU Y.1731) /Connectivity OAM (CFM IEEE 802.1ag) SLA Monitoring/Performance monitoring Continuity verification Service level loopback AIS/RDI or fault propagation Test head to generate test suites (RFC-2544) Cable integrity test for customer premise Cust. Eqpmnt. Customer Premise Link OAM Service/Connectivity OAM NID/NTE
© 2007 ADVA Optical Networking. All rights reserved. Remote Failure – Link Fault/Critical Event 10/100BT Customer Premise Demarcation Device Demarcation Point EoX Link Fault msg Link Fault – eg Loss of signal is detected by the receiver Sent once per second Critical Event – Manufacturer specified failure eg hardware or software alarm Sent immediately and continuously R&E Backbone NW Cust. Eqpmnt.
© 2007 ADVA Optical Networking. All rights reserved. Remote Failure - Dying Gasp 10/100BT Customer Premise Demarcation Device R&E Backbone NW Demarcation Point EoX Dying Gasp msg Signals carrier that an unrecoverable local fault (e.g. power failure) has occurred Sent immediately and continuously Critical for both AC and DC powered customer premise located equipment Cust. Eqpmnt.
© 2007 ADVA Optical Networking. All rights reserved. Cable Integrity Testing Identifies opens, shorts and impedance problems with CAT-5 cable on customer premise Measures distance to cable fault Addresses large percent of customer induced issues Remote Fault 10/100BT Customer Premise Demarcation Device R&E Backbone NW Demarcation Point EoX Cust. Eqpmnt.
© 2007 ADVA Optical Networking. All rights reserved. Customer Premise Port Loopback 10/100BT Customer Premise Demarcation Device Network Port Loopback Port level (intrusive) testing is ideal for turn up and commissioning Eliminates truck rolls Works with central test head to perform RFC-2544 tests Measures performance (delay, dropped packets, throughput, etc.) Test Pattern 1 Demarcation Device Customer Equipment Test Pattern 2 Port Loopback Test Head
© 2007 ADVA Optical Networking. All rights reserved. Customer Premise Selective (Non-Intrusive) Loopback 10/100BT Customer Premise Selective Loopback Selective loopback performed on VLAN or specific OAM frames (e.g. opcode: ETH_LB) Test an individual EVC (VLAN) while remaining EVCs are in- service Also used for continuity check and service assurance Far-end test head executes test periodically on non-service affecting VLAN or OAM frame to verify end to end connectivity through entire network – similar to ping Can measure delay, throughput, dropped frames of end-to-end service – follows actual data path (LSP, etc.) of customer traffic Test Pattern Customer Traffic Demarcation Device Demarcation Device Customer Equipment Test Head
© 2007 ADVA Optical Networking. All rights reserved. Customer Premise Ethernet Test Head 10/100BT Customer Premise Demarcation Device Network VLAN/Port Loopback Test Pattern Demarcation Device Customer Equipment Demarc device provides an embedded test generation function EVC (VLAN) or port based test patterns Tests end to end data path over actual data path Eliminates truck rolls to end user site Works with far-end port/VLAN loopback to perform end to end testing for turn-up or fault isolation Executes RFC-2544 test suites to measure: Number of frames received Proper frame sequence and headers Received traffic rate Transmission delay Supports 4 key SLA parameters: Availability, delay, delay variation, dropped traffic Test Head
© 2007 ADVA Optical Networking. All rights reserved. Ethernet AIS/RDI – Y.1731 Used to suppress downstream alarms and eliminate alarm storms from a single failure Commonly used in legacy services like SONET, TDM, frame relay, etc. Insert AIS Alarms Suppressed Report Alarm
© 2007 ADVA Optical Networking. All rights reserved. Fault Propagation 10/100BT Customer Premise Demarcation Point EoX Fault Propagation allows upstream link issues to propagate downstream Critical for end user applications that need visibility of network issues Eg Redundant routing protocols (HSRP) Demarcation Device R&E Backbone NW Cust. Eqpmnt. Link down AIS RX JABBER RFI DUP UNKNOWN Link down AIS Do nothing Propagation
© 2007 ADVA Optical Networking. All rights reserved. Carrier Ethernet Challenges Source: Light Reading Webinar 2006 What is holding service providers back from deploying Ethernet more aggressively? 16% 66% 18% Better alternative solutions Performance monitoring/SLAs inadequate Price
© 2007 ADVA Optical Networking. All rights reserved. RMON RFC /100BT EoX Visibility Carrier NetworkCustomer Network Local performance monitoring Collected on port and EVC (VLAN) basis From both sides of demarcation point Includes parameters such as: Packet counts, multi-cast pkts, CRC errors, pkt size, collisions, jabber, etc. RMON designed for enterprise LAN applications – also need: Discarded packets (out of SLA), average bit rate parameters, ingress vs. egress BW, etc. Demarcation Device R&E Backbone NW EoX Cust. Eqpmnt.
© 2007 ADVA Optical Networking. All rights reserved. CFM SLA Monitoring Techniques Based on Continuity Check Messages (CCM) in 802.1ag (CFM) and Y.1731 Sent 1/Second – Fault Management Sent 10/Second – Performance Monitoring Sent 300/Second – Protection Switching CCM Frame Delay, Delay Variation, Frames Lost, Service Availability 10/100BT R&E Backbone NW 10/100BT Demarcation Device Demarcation Device
© 2007 ADVA Optical Networking. All rights reserved. SLA Verification End to end SLAs are critical for carrier grade Ethernet services Service availability, frame delay, frame jitter and dropped frames Both round trip and 1 way basis Standards provide tools for SLA measurement – 802.1ag, ITU Y.1731 Emerging technology – Ethernet demarcation devices required to measure end to end SLAs 10/100BT R&E Backbone NW 10/100BT Customer Premise Customer Premise Demarcation Device Demarcation Device End to End SLA Verification IP Net Perf. Link Perf. Link Perf.
© 2007 ADVA Optical Networking. All rights reserved. Performance Management OS Complements SLA measurement by demarcation devices Centralized tool for collecting performance monitoring data and storing in a database Centrally stored data can be used for real-time reporting or monthly reports Service-oriented Key Performance Indicators (KPIs) GigE EoCopper EoSONET/SDH 10BT 100BT OC-3/12 STM-1/4 Leased DS3/E3 100BT EoDS3/E3 1000BT GBE or 100FX EoT1/E1 ADM Leased Ethernet 100BT R&E Backbone NW
© 2007 ADVA Optical Networking. All rights reserved. Summary OAM standards for Ethernet in the WAN have come a long ways to support Ethernet in the WAN Remotely located demarcation devices are key to implementing these new standards With a full suite of OAM, Ethernet becomes a much more intelligent service
© 2007 ADVA Optical Networking. All rights reserved. Questions??? ?
Thank You For more information contact: Brian Savory - IMPORTANT NOTICE The content of this presentation is strictly confidential. ADVA Optical Networking is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA Optical Networking shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA Optical Networking.
© 2007 ADVA Optical Networking. All rights reserved. Key applications Demarcation: Differentiated, dedicated or shared Ethernet services Extension: Ubiquitous Ethernet service delivery over any media Aggregation: Secure carrier-class Ethernet transport access network with up to 1:1000 aggregation ratio Key benefits Intelligent Ethernet: differentiated service delivery with full end-to-end SLA monitoring for mission critical applications Ubiquitous Ethernet: Support for a variety of fiber and copper transport standards allows service to be delivered in region and out of region FSP 150 Ethernet access solution Source: Infonetics 2007 ADVA is the largest Ethernet access vendor in the world (>100K deployed fiber demarcation devices)
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