ExtremeSwitching (Other)

  • 1.  Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 10:53
    Colleagues, good afternoon . Prompt
    please, there is such problem - if one of switches in a stack (master) is overloaded that the second node backup is overloaded after it through
    10-15 seconds. And this in my opinion is some nonsense. Have you encountered such behavior of the stack and can it be defeated?



    On the X670G2-48x and G670G2-72x stack, the license level on both switches is the same, both have master capability enabled.

    Slot-2 Stack.12 # show stacking detail
    Stacking Node 00:04:96:a0:7f:9d information:
    Current:
    Stacking : Enabled
    Role : Master
    Priority : 100
    Slot number : 2
    Stack state : Active
    Master capable? : Yes
    Stacking protocol : Enhanced
    License level restriction :


  • 2.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:00
    Why leads you to think that stacking of these two switches is the source of your problem? What do you mean by the stack members being overloaded?


  • 3.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:06
    I think the firmware on both switch are not equal. Use the command show switch and show version image to check this.


  • 4.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:09
    Hello!

    1. What EXOS version?
    2. Is there some messages appear in logs?
    3. What sys-recovery level configured?
    4. Is both nodes powered by same UPS? Is backup node rebooting when power off manually Master node?
    5. As I understand Master node was changed from 00:04:96:98:79:f9 to 00:04:96:a0:7f:9d?

    Thank you!


  • 5.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:13
    Hi Robert,

    1. I do not think that the problem is stacking different switches

    2. It means that I disconnect the power supply from the switch which in this topology is a master


  • 6.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:13
    I am sorry but I am not understanding what the problem is you are trying to solve. Are you trying to force the backup master to take over by powering off the master slot?


  • 7.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 11:18
    Slot-2 Stack.3 # show switch

    SysName: Stack
    SysLocation:
    SysContact: support@extremenetworks.com" target="_blank" rel="nofollow noreferrer noopener">support@extremenetworks.com, +1 888 257 3000
    System MAC: 02:04:96:98:79:F9
    System Type: X670G2-48x-4q (Stack)

    SysHealth check: Enabled (Normal)
    Recovery Mode: All
    System Watchdog: Enabled

    Current Time: Wed Jul 25 23:24:37 2018
    Timezone: [Auto DST Disabled] GMT Offset: 0 minutes, name is UTC.
    Boot Time: Wed Jul 25 23:15:49 2018
    Boot Count: 42
    Next Reboot: None scheduled
    System UpTime: 8 minutes 47 seconds

    Slot: Slot-2 * Slot-1
    ------------------------ ------------------------
    Current State: MASTER BACKUP (In Sync)

    Image Selected: secondary secondary
    Image Booted: secondary secondary
    Primary ver: 21.1.3.7 15.6.0.15
    Secondary ver: 16.2.4.5 16.2.4.5
    patch1-8 patch1-8

    Config Selected: primary.cfg
    Config Booted: primary.cfg

    primary.cfg Created by ExtremeXOS version 16.2.4.5
    721253 bytes saved on Wed Jul 25 23:14:56 2018

    >> As I understand Master node was changed from 00:04:96:98:79:f9 to 00:04:96:a0:7f:9d?

    Yes



  • 8.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 13:00
    please write a scenario of what is happening. as it stands it appears you are unplugging the master, and testing failover, but when you do this it reboots the standby node? is this correct?

    log in to the secondary switch and view the log messages. see if you can post those here, we would need the switch to tell us why it felt the need to reboot.

    I do know that it is common issue for the whole stack to reboot if 2 switches are in state Master ( the log will state "dual Master" and reboot the whole stack.

    I have seen this when the master stacking modules fail. the switch stays running, but the links between switches flicker/ bounce sending the stack in to dual master... the whole stack fails and reboots.

    so I would check the cables you have between the switches to see if either of them are having issues.

    you can also look as stacking port RX errors



  • 9.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 15:17
    Colleagues, thank you.

    The problem is solved by "config stacking redundancy maximal" on EACH chassis in the stack.

    P.S.

    The master capability was enabled on each chassis in the stack.

    the level of the core license on both chassis in the stack.

    All this did not help the backup chassis rebooting with the master , when the power was turned off on

    the chassis master in the stack .



  • 10.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 15:17
    Hello, Vladimir!

    It's little bit strange, because command "config stacking redundancy maximal" for setting all stack-nodes as master-capable:
    - default value have to maximal
    - in your outputs both nodes have master-capability enabled:
    "Master capable? : Yes"
    "MAC Address Cfg Cur Prio Mgmt IP / Mask Gateway Flags Lic
    ------------------ --- --- ---- ------------------ --------------- --------- ---
    *00:04:96:a0:7f:9d 2 2 100


  • 11.  RE: Extreme Stacking Backup Node Reboot

    Posted 07-25-2018 15:17
    And yet it is so