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C3 discarded frames on DCX director connected to IBM SVC 6.3

  • 1.  C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-23-2014 04:53 AM

    I have a DCX director (2499-816) FOS 7.1.1 connected to IBM SVC 6.3 the SVC connected ports on the director are showing alot of C3 discarded frames and also Time BB_credit zero. also we are geting adaptor error on the host

    can anyone please explane this and how to solve it.


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  • 2.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 03:06 AM

    Hello Ahussien,

     

    How is the topology of your SVC ? how many iogroups?

    How do you interconnect both nodes in an iogroup ?

    Do you share the svc ports to both backend and front end traffic?

    How do you populate your storage and SVC ports on the DCX ?

    What blade types do you use on the DCX ?

     

    Keep in mind that you should avoid the use of ISL to interconnect both nodes on an SVC iogroup. If you do not use ISL to the interconnect, do you best to use local switching to that (same asic)

     

    For big SVC implementation or high traffic applications, its not a good idea to share BE (storage) and FE (hosts) traffic in a single port.

     

     

     


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  • 3.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 05:04 AM

     

     

    How is the topology of your SVC ? how many iogroups? I have 2 IOgroups

    How do you interconnect both nodes in an iogroup ? FC

    Do you share the svc ports to both backend and front end traffic? yes but this is the best thing as per IBM

    How do you populate your storage and SVC ports on the DCX ? spred on 4 modules

    What blade types do you use on the DCX ? 4*48 8G


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  • 4.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 05:33 AM

    @Anonymous wrote:

     

     

    How is the topology of your SVC ? how many iogroups? I have 2 IOgroups

    How do you interconnect both nodes in an iogroup ? FC

    Do you share the svc ports to both backend and front end traffic? yes but this is the best thing as per IBM

    How do you populate your storage and SVC ports on the DCX ? spred on 4 modules

    What blade types do you use on the DCX ? 4*48 8G


    what is your firmware level on the DCX ?

     

    I dont like to share host and storage on big environments. Is that your case?

    How many switches do you have? do you use core-edge topology? is the svc connected to the core?

    can you send a switchshow of you DCX and tell us the ports where the SVC nodes as connected?


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  • 5.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 05:49 AM

    what is your firmware level on the DCX ? 7.1.1

     

    I dont like to share host and storage on big environments. Is that your case? SVC best practice is to zone all SVC ports with the host and zone all SVC ports with storage

    How many switches do you have? do you use core-edge topology? is the svc connected to the core? all storage and hosts are consolidated on the DCX

    can you send a switchshow of you DCX and tell us the ports where the SVC nodes as connected?


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  • 6.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:00 AM

    Can you share the switchshow?


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  • 7.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:05 AM


  • 8.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:15 AM

    that issue can also come from cabling, if you did not clean the plugs before connecting everything to the dcx.

     

    but if you can not share switchshow, how do you think we can help you?


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  • 9.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:19 AM

    it's no cables this problem is occouring in 2 different data centers with different DCX's and SVC's

     

    regarding the switchshow do you need an upload of the full result or just part of it

     


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  • 10.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:20 AM

    Since this can't be solved with a guess, all i can do is to wish you good luck.


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  • 11.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:21 AM


  • 12.  Re: C3 discarded frames on DCX director connected to IBM SVC 6.3

    Posted 06-24-2014 06:32 AM

    i would try to solve one issue after the other.

     

    basicaly check physics.

    if you havent plugged in the LC plug correctly you can have fames discards, first you need to find out where the error does come from, so i would suggest lets work first on that.

    lets have a look at the first storage port that does generate those errors.

     

    for this port we´d like to see the following

     

    a port errshow for the port we are lookin at

    the a switchshow/portshow/portstatsshow and a portcfgshow

     

    just copy past the outputs in here.


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