1 / 23

Best Practices for Ensuring LAN Performance

Best Practices for Ensuring LAN Performance. Transitioning Networks to Gigabit Ethernet. Agenda. Main reasons and motivations for moving to Gigabit Ethernet Ethernet technology overview Pros and cons of ANSI/EIA/TIA-568-B tests

ashtyn
Download Presentation

Best Practices for Ensuring LAN Performance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Best Practices for Ensuring LAN Performance Transitioning Networks to Gigabit Ethernet

  2. Agenda • Main reasons and motivations for moving to Gigabit Ethernet • Ethernet technology overview • Pros and cons of ANSI/EIA/TIA-568-B tests • Step-by-step upgrade process to verify capability of existing pairs to carry 1000BASE-T

  3. Increasing “need for speed” Streaming audio/video VoIP YouTube Distance learning Radio/TV streams On-Line applications Presence/Collaboration Time cards Expenses SAP, Oracle, etc. Decreasing cost Cost per switch port Cost per Network Interface Card (NIC) Most existing cabling infrastructure supports it Why transition the desktop to Gigabit Ethernet?

  4. 10BASE-T • Standard released in 1990 • First Ethernet over twisted pair standard • Category 3 Cabling • Two pairs used – 1 transmit/1 receive • Manchester Coding • 16 MHz

  5. 100BASE-TX • Standard released in mid-1990’s • Auto-Negotiation for speed and duplex • Category 5 Cabling • Two pairs used – 1 transmit/1 receive • Multi-Level Transition – 3 (MLT-3) Coding • 31.25 MHz

  6. Clock 1 2-Level Code 0 1 1 0 1 0 1 0 0 11 11 10 10 10 4-Level Code 01 00 00 1000BASE-T • Standard released in 2000 • Category 5 cabling • Four pairs used – 250 Mbps per pair full duplex • 5 Level Pulse Amplitude Modulation (PAM-5) • 80MHz

  7. 10BASE-T/100BASE-TX Media Dependant Interface • Ethernet devices (NICs in PCs and routers) transmit on pins 1&2 and receive on pins 3&6. Referred to as MDI • Switches and hubs are wired MDI-X (transmit on pins 3&6, receive on pins 1&2) T568B T568A

  8. Ethernet Summary

  9. 802.3 Ethernet standard for rates from 1Mbps to 10Gbps over coax, twisted pair, and fiber optic cabling 568 Specifies a generic telecommunications cabling system for commercial buildings IEEE 802.3 vs. ANSI/EIA/TIA-568-B.1

  10. Pros Required for some cable/connector vendor’s warranty for new installations Certifies cable to meet category 5e, 6 or 6A Measures a wide range of frequency-based results: NEXT PSNEXT ELFEXT PSELFEXT Cons Does not prove operation of Ethernet over cable link Does not perform Ethernet Bit Error Rate Test Does not measure overall system noise May fail links that would work fine for 1000BASE-T ANSI/EIA/TIA-568-B.1 Tests – Pros and Cons

  11. Transitioning existing networks to 1000BASE-T • See if existing plant can support new speed BEFORE pulling new cables • CAT5 (or better) cabling already installed • No real need to run full EIA/TIA tests • Cost-effective alternative: • Run actual 1000BASE-T signals and analyze for errors • Bit Error Rate Test (BERT)

  12. Step-by-Step Process Move to 1000BASE-T with confidence!

  13. Process Overview • Create a test plan • Test • Ensure correct cable is being disconnected • Basic cabling (wiremap/length) • 1000BASE-T tests (SNR, Skew, BERT) • Verify Gigabit connectivity • Port Discovery • Ping • Document results

  14. Create a Test Plan • What cables are you going to test? • Where do they run from? • Where do they terminate?

  15. Test - Correct cable being tested? • Hub Flash • Cisco Discovery Protocol • Will ID the switch port • Once SURE, disconnect the cable at the switch and connect remote test device

  16. Test - Perform basic cabling tests • Remember 10/100 only needed 4 pins but gigabit needs all 8! • Opens/Shorts/Miswires/Split Pairs • Length

  17. Skew Delay differential SNR Noise sources: NEXT/FEXT, echo noise, ambient noise Measure Delay Skew and SNR Signal SNR – “Distance” between Signal and Noise Noise

  18. Bit Error Rate Test • Send actual 1000BASE-T signals (PAM-5) • Make sure the data sent from one end get to the other end without errors

  19. Connect to new switch port • Disconnect remote test device • Connect cable run to new switch port • Verify new port is configured correctly • Port Discovery • Auto-Negotiation or manual setting? • If Auto-Negotiation, what is being advertised?

  20. Verify Network Layer (IP) connectivity • Obtain IP host configuration • Dynamic Host Configuration Protocol (DHCP) • Or manual configuration • Ping network devices • Router • Domain Name System (DNS) • Any other IP device • Connect upgraded Ethernet device!

  21. Document Results • Cabling plan • Update documentation for cabling runs • Test Results • Use for future reference/troubleshooting

  22. Summary • For the IT manager • Using existing infrastructure is cost effective • Need to test cabling first • Speed certification ensures 1000BASE-T will work • For the cabling contractor • New revenue opportunities • For everyone • JDSU has the tools and expertise to help make you successful!

  23. Questions and Resources? • Q&A • www.JDSU.com/know for: • Validator-NT product information • View Validator-NT product demo • Locate a distributor • See full line of JDSU Network and Enterprise Test solutions • Recorded Webinar will be made available later this week • Contact Us: • nettraining@jdsu.com

More Related