Brocade Fibre Channel Networking Community

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  • 1.  Ports

    Posted 04-15-2013 08:37 AM

    Can some one tell me what is the main function of

    What is M port?

    What are Back end ports?

    What does 10 bit addressing mean, hw to enable it.

    when you say 2048 BB credits is it in Bytes ?


  • 2.  Re: Ports

    Posted 04-15-2013 09:04 AM

    Greetings thrinath.seelam.  I'd suggest starting with our SAN glossary for reference.  its a bit dated (2008), but does provide a great intro on many of the fibre channel terms.

    For the 10-bit addressing, please reference the Admin Guide which can be found at:


  • 3.  Re: Ports

    Posted 04-15-2013 09:09 AM

    Thanks for the revert but I did not get the answer in both the links,


  • 4.  Re: Ports

    Posted 04-15-2013 09:40 AM

    The primary port types are covered in the glossary.  M_port is a mirror port.  Backend ports are basically the internal ports (ie ASIC to ASIC).  10-bit addressing is very much addressed in the 2nd link.  Please see "10-bit addressing mode" in the Admin Guide.  The primary point i was trying to make in my original reply is your questions are actually covered in our existing documentation, but for your BB_credit question can also reference:

    You will find helpful topics such as Buffer credit management, Buffer-to-buffer flow control, Optimal buffer credit allocation, Buffer credit allocation based on full-sized frames, Fibre Channel data frames, etc, etc.


  • 5.  Re: Ports

    Posted 04-15-2013 10:11 AM

    My bad, sorry i got it in the document

    Thanks for the revert