Fibre Channel, FCOE and FCIP: Oh My!

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  • Fibre Channel, FCOE and FCIP: Oh My!

    1. 1. Fibre Channel, FCoE, and FCIP: Oh My! Evaluating Storage Protocols in Distance Solutions J Metz, Ph.D – Sr. Product Manager @drjmetz © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1
    2. 2. Distance  What do I need to know about storage distance?  How far can I go?  Am I using the right tool for the job? Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 2
    3. 3. Three Major Things Don't miss out on any of them! Know your physical layer Know your protocol Know your limitations! Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 3
    4. 4. Let's Get Physical! © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4
    5. 5. Optics How to Differentiate? Fibre Channel Optics Ethernet Optics -Yes, can transmit Fibre Channel too! Speed Power (i.e., Strength) -Translates to distance Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 5
    6. 6. Optics Distance Requires Specialized Solutions Eth -SR FC -SR FC -MR FC/Eth -LR FC/Eth -ER CWDM DWDM 300m SFP+ -8 Gbps+ 860m 1 km Longer distances often mean lower throughput speeds 4 km 5 km 10 km SFP -Up to 4Gbps 10 km 40 km 40 km 100 km 100 km km 2000+ km Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 6
    7. 7. Cables Three Major Types Copper-based -Generally not suitable for distances greater than 30m -So... not a "long-distance solution" Multimode Fibre Optical -SMF: "Single Mode Fibre" Single Mode Fibre -Small diameter core -Allows only one mode of light to be sent -Longer effective distance - 100 km or less -Need transceivers that have more power -MMF: "Multi-Mode Fibre" -Larger diameter core -Allows multiple paths (modes) to be sent at the same time -Shorter effective distance - around 16 km or less -Generally uses cheaper equipment and easier to interconnect -Good for general purpose applications (e.g., campus, building deployments) -Often orange in color Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 7
    8. 8. Dark Fibre The Dark And Mysterious Force Cabling laid out by telecommunication companies that isn't being used (dark vs. 'lit') Leased lines to companies who wish to communicate over great distances Follows same rules as we've already gone over Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 8
    9. 9. Use The Proper Protocol © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9
    10. 10. Fibre Channel (FC) It's All About the Source Fibre Channel is a source-based mechanism for lossless delivery Buffer to buffer (B2B) credits keep FC frames in order 1 buffer = 1 frame Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 10
    11. 11. FC Distance Mo' Buffers Mean Mo' Distance Longer distances require more time to receive acknowledgements (Very expensive to not use a pipe) Ports can "donate" buffer credits to other ports Can send more data before acknowledgement Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 11
    12. 12. Fibre Channel over Ethernet (FCoE) On the Receiving End FCoE is a receiver-based mechanism for lossless delivery Receiving switch has a "high water mark" Includes frames already "in the bucket" as well as frames in flight. When threshold is reached, PAUSE frame is sent (IEEE 802.1Qbb) Distance is proportional to receiver capability Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 12
    13. 13. Fibre Channel over IP (FCIP) Go Long! No, Even Longer! Other alternatives include running over lossy links -No buffer credits -No Priority Flow Control Usually done over 1GbE links Acceleration tools (like IOA) are available Best of both worlds: -Uses IP infrastructure and management resources to connect and extend FC SANs -Keep high-performance SAN base; whilst increasing data sharing between SANS transparently Storage Distance by Protocol © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 13
    14. 14. Visit Cisco Booth D209 Twitter: @ciscoDC, #vmworld Facebook: http://www.facebook.com/CiscoDC Youtube: http://www.youtubecisco.com/datacenter Cisco DCC Blog: http://blogs.cisco.com/datacenter Slideshare: http://slideshare.com/CiscoDataCenter Community: : https://communities.cisco.com/community/technology/datacenter Pinterest: http://pinterest.com/ciscosystems/data-center LinkedIn: http://www.linkedin.com search “Cisco Data Center” group Google +: http://goo.gl/irm4b In Collaboration with Intel® Intel, the Intel logo, Xeon and Xeon inside are trademarks of Intel Corporation in the U.S. and other countries.
    15. 15. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15

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