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[SOLVED] Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

  • 1.  [SOLVED] Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 10-06-2014 03:30 AM

    Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on brocade 6520 switches

     

     

    --> Current situation:

     

    We are operating IBM SVC (Firmware V7.3.0.6, HW CG8) on a Brocade SAN256B Director (FOS 6.4.1.a)

     

    --> Goal:

     

    We´d like to replace our current IBM SVC CG8 hardware with the new IBM SVC DH8 hardware (in place upgrade). The new SVC Nodes are connected to other (new!) switches in the same fabric (Brocade 6520, FOS 7.2.1a). So there is no need to chang zoning.

     

    --> Problem:

    Step: replace first node hardware CG8 with DH8 and re-add to the cluster.

    Problem: a few host paths (windows, linux, esx) were still be offline but not all!

     

    Work a round: connecting the new SVC Node to the old Brocade SAN256B director brought all paths immediately online.

     

    Storage backend and SVC interconnect were unconcerned. All backend paths were online on the new brocade 6520 with the new SVC DH8 Nodes.

     

    Does anyone have an idea?

     

    Thanks in advance!

     

     


    #SVC
    #BrocadeFibreChannelNetworkingCommunity
    #lunsnotvisible
    #ibm
    #director
    #6520
    #CG8
    #DH8
    #pathoffline


  • 2.  Re: Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 10-06-2014 10:22 AM

    Hi,

     

    is probable you need to made some port parameter change "portcfgshow" command give details.

     

    for details how to set the port, "portcfg" please refer the FOS command reference manuals


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  • 3.  Re: Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 10-06-2014 11:08 PM

    thank you for your reply.

     

    here is the portcfg of the port which does not work on the new switch:

    Area Number:              50
    Octet Speed Combo:        1(16G|8G|4G|2G)
    Speed Level:              8G
    AL_PA Offset 13:          OFF
    Trunk Port                ON
    Long Distance             OFF
    VC Link Init              OFF
    Locked L_Port             OFF
    Locked G_Port             ON
    Disabled E_Port           ON
    Locked E_Port             OFF
    ISL R_RDY Mode            OFF
    RSCN Suppressed           OFF
    Persistent Disable        OFF
    LOS TOV enable            OFF
    NPIV capability           ON
    QOS Port                  AE
    Port Auto Disable:        OFF
    Rate Limit                OFF
    EX Port                   OFF
    Mirror Port               OFF
    SIM Port                  OFF
    Credit Recovery           ON
    F_Port Buffers            OFF
    E_Port Credits            OFF
    Fault Delay:              0(R_A_TOV)
    NPIV PP Limit:            255
    CSCTL mode:               OFF
    D-Port mode:              OFF
    D-Port over DWDM:         OFF
    Compression:              OFF
    Encryption:               OFF
    FEC:                      ON

     

     

    this is the portcfg on the old director which works fine:

    Area Number:              77
    Speed Level:              AUTO(HW)
    Fill Word:                0(Idle-Idle)
    AL_PA Offset 13:          OFF
    Trunk Port                ON
    Long Distance             OFF
    VC Link Init              OFF
    Locked L_Port             OFF
    Locked G_Port             OFF
    Disabled E_Port           OFF
    Locked E_Port             OFF
    ISL R_RDY Mode            OFF
    RSCN Suppressed           OFF
    Persistent Disable        OFF
    LOS TOV enable            OFF
    NPIV capability           ON
    QOS E_Port                OFF
    Port Auto Disable:        OFF
    Rate Limit                OFF
    EX Port                   OFF
    Mirror Port               OFF
    Credit Recovery           ON
    F_Port Buffers            OFF
    Fault Delay:              0(R_A_TOV)
    NPIV PP Limit:            126
    CSCTL mode:               OFF

     

     


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  • 4.  Re: Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 10-08-2014 12:14 AM

    Is there any pattern on which host paths are working and which not? Is that really bound to a specific node or a fabric or a set of hosts? For example could it be that there is a configuration on the host that doesn't care much about changes in the fabric and therefore didn't re-login to the new SVC ports (with hopefully the old WWPN)? AIX for example has the dyntrk option. If it's disable, AIX won't care much about the ports in the new position (because the FC-ID changes).


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  • 5.  Re: Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 10-10-2014 12:29 AM

    hi thank you for your input.

     

    "Is there any pattern on which host paths are working and which not?"

    Indeed there is one. Basically it is only svc port 2 in fabric 2 which makes the troubles.

     

    We can reduce the problem to the following statement:

    Is the initiator port connected to the old directors and the target port to the new switches -> end in fail condition.

    But the condition exists only on svc port 2 in fabric 2 :)

    Svc port 4 in fabric 2 --> works on the new switches

    SVC port 1,3 in fabric 1 --> works on the new switches

     

    "For example could it be that there is a configuration on the host that doesn't care much about changes in the fabric and therefore didn't re-login to the new SVC ports"

    All the other paths are online on the hosts, when moving the svc ports on the new switchs.

    Only port svc port 2 is concerned.

     

    Hosts connected to the new brocade switches are unconcerned!

     

    Initiator old director -> target new switch --> BAD, only svc port2

    Initiator old director -> target old director --> GOOD

    Initiator new switch -> target old director --> GOOD

    Initiator new switch -> target new switch --> GOOD

     

    If we exchange svc port 2 to svc port 6 in zoning, then port 6 is affected .....

     

    Thanks for your Help!

     


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  • 6.  Re: Path´s offline when changing IBM SVC hardware from CG8 nodes on brocade directors to DH8 nodes on....

    Posted 11-25-2014 09:56 AM

    Problem solved!

     

    Problem was a bug in FOS 6.4.2.

     

    DEFECT000469915

     

    Symptom: CLI nscamshow reported "state is unknown" for remote switches' Port IDs and impacted devices cannot communicate with each other.

     

    Work-A-Round: hafailover

     

    Solution: Upgrade FOS

    We are now running FOS 6.4.3f on Directors


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