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DS5300 Buffer Credits,

  • 1.  DS5300 Buffer Credits,

    Posted 04-09-2013 10:11 AM

    Hello:

    We are experiencing a lot of time spent with the buffer credits hitting 0. On average for of our ISL ports are hitting 0 between 30 and 50% of the time. The buffers are set to the default 16, would increasing the number of credits help our issue. I know there will be many questions on this thread back to me about the current setup and I will do my best to answer them. I am new to this environment so I will do my best.


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  • 2.  Re: DS5300 Buffer Credits,

    Posted 04-10-2013 03:49 AM

    Hi,

    What's the current config in the ISLs?


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  • 3.  Re: DS5300 Buffer Credits,

    Posted 04-10-2013 04:40 AM

    How would I go about getting the current config on the ISL ports?


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  • 4.  Re: DS5300 Buffer Credits,

    Posted 04-10-2013 05:51 AM

    portbuffershow will display allocated bb credits. There are a lot of reasons why credits will continually hit 0. This could range from long distance settings incorrect for actual distance, poor SAN design, non-recommended oversubscription of ISL's or high latency / slow drain devices in the network.


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  • 5.  Re: DS5300 Buffer Credits,

    Posted 04-11-2013 12:22 AM

    the amount of BB credits could be different in both ends of the ISL, that depends on the settings configured and the type of ASIC and switch.

    I agree with . To check the config you can run portcfgshow and the amount of BB credits with portbuffershow


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