Global Storage

 View Only

  • 1.  I have a question about the zoning configuration of FS5200

    Posted Thu July 25, 2024 02:14 AM
    lstargetportfc
    zone

    Hello,

    I have a question regarding the zoning configuration of the FS5200.

    The configuration consists of 8 server hosts, 2 SAN switches, and 1 FS5200. Each of the 8 servers is assigned one volume from the FS5200.

    The problem is that the host status on the storage shows as "Degraded".

    I researched the reason for this "Degraded" status.

    I found that this issue occurs when the host's status policy is set to "Redundant" and it cannot find a redundant path or there is a port without a WWPN login, causing the "Degraded" status.

    So, I accessed the FS5200 terminal and entered "lstargetportfc". As shown in the image above, I found that the "active_login_count" for port_id 1 and 3 on node 2 were 3 and 0, respectively.

    It seems that port_id 3 appears as "Degraded" because the active_login_count is 0.

    I reported this issue to the on-site engineer, and they checked the SAN switch and cables. They found an issue with the SAN switch configuration and informed me that the issue has been resolved.

    Here are my questions:

    1. Did I correctly identify the root cause of the problem?

    2. In a properly redundant configuration, should the "active_login_count" for all ports be "8" like the other ports?

    3. Could the reason for port 1 and 3 having "active_login_count" values of 3 and 0, respectively, be due to multipath issues?

    Since I haven't had the opportunity to access the system after the issue was resolved, I am posting this question here.



    ------------------------------
    dongyong kang
    ------------------------------


  • 2.  RE: I have a question about the zoning configuration of FS5200
    Best Answer

    Posted Fri July 26, 2024 08:13 AM

     Hello,

    1 Yes, the root cause is missing paths.
    2 Yes, in a redundant configuration, there should be the same number of paths to both controllers.
    3 The reason probably is a cabling, zoning misconfiguration or both.

     I've attached a simple schema based on that reflects your 'lstargetportfc' output. The problem is on the left fc switch (fc switch 1 on my table) zoning/cabling.

     To simplify zoning, it's recommended to use peer zones. It's also unnecessary map all host ports to all controller ports. The optimal number of volume paths per host is four.

    Regards.


    ------------------------------
    Javier Gavilan Lopez
    IT Director
    COLABORATIC
    Valencia
    ------------------------------

    Original Message


  • 3.  RE: I have a question about the zoning configuration of FS5200

    Posted Mon July 29, 2024 01:12 AM
    Edited by dongyong kang Mon July 29, 2024 01:12 AM

    Thank you. I needed to confirm if my approach was correct.



    ------------------------------
    dongyong kang
    ------------------------------

    Original Message


  • 4.  RE: I have a question about the zoning configuration of FS5200

    Posted Tue September 03, 2024 03:40 PM

    It seems you correctly identified the root cause of the "Degraded" host status as being related to the lack of a redundant path or missing WWPN login, particularly on port_id 3 with an "active_login_count" of 0. In a fully redundant configuration, the "active_login_count" for each port should ideally match the number of connected paths, in this case, 8 per port, indicating all paths are active. The discrepancies in login counts (3 on port 1 and 0 on port 3) could indeed be due to multipath issues, such as incorrect zoning, path failures ,or misconfigurations on the SAN switch, which you've mentioned were addressed by the engineer. Re-checking the system post-resolution would confirm if the redundancy and login counts are now as expected.



    ------------------------------
    shoib 000
    ------------------------------

    Original Message