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jomedusa's avatar
jomedusa
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Jul 05, 2023

LTM Traffic group failover

We have 4 LTM's in a device group and moved one of our Traffic groups to a different LTM a few weeks ago.  All 4 devices show that padf5-core1.csiweb.com (the LTM it was moved to) as the active devic...
application delivery
whisperer's avatar
whisperer
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Jul 05, 2023

You may have a split brain situation where you actually dont have an active sync and network failover happeneing between all 4 devices. Do you have all 4 devices within the same device-group/traffic-group? When you perform an iqdump on each unit, do you see the other 3 units communicating properly? Can you provide a screenshot of the sync page, where the F5 units part of the device groups are listed with their current status -- ie, grey or green balls.

  • jomedusa's avatar
    jomedusa
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    Jul 05, 2023

    My ultimate goal will be to have only 2 devices in the traffic group for failover as we will be decommisioning 2 of the LTM's later this year.

     

    From the image below I would like to ultimately only have the padf5-core1 and padf5-core2 in the traffic group, but currenly all the traffic is on Pad-F5-2.

     

    Can you please provide more information on the iqdump?

    Thanks,

     

     

     

    • whisperer's avatar
      whisperer
      Icon for MVP rankMVP
      Jul 05, 2023

      Do you have more than one traffic group configured? That is another instance where you would have more than one F5 unit active. If the traffic groups are not on the same unit, then multiple units may be active. If you need to move connections ASAP, just force offline the problematic F5 unit.

      Looks like the devices should all see each other and configs are synced. So there shouldnt be any issue with network failover, the port lockdown settings, or iquery comms in this case. (If you log into each unit and the standby / active devices all look the same in GUI .. connected, grey balls or green balls, same ball colors, etc. then connectivity wise you should be OK. I would check the traffic groups.

      • jomedusa's avatar
        jomedusa
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        Jul 05, 2023

        Yes we have seperate traffic groups for each Partition.  My goal is migrate each Partion/Traffic group to the new LTM in phases.  I know I have moved between all of the devices in the past but I am not sure I have since we performed an upgrade a few months ago.  I think I am going to migrate traffic off the "problem one" this weekend and then perform a reboot.  I have held off on this but I am pretty sure I am hitting a known issue where the versions don't show up correctly from one device to another, I have had this in the past and had to perform the following:

        K13030: Forcing the mcpd process to reload the BIG-IP configuration

        https://support.f5.com/csp/article/K13030

        Thanks,

        Joe