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Dual ethernet port AP535 configuration best practices

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  • 1.  Dual ethernet port AP535 configuration best practices

    Posted Jul 27, 2020 08:25 AM

    Hello folks,

     

    What would be the best practices for connecting AP with both ports in term of a switch config without leveraging LACP?

     

    I observe a layer2 loop every single time AP is connected to the network with both ports. The loop goes away as soon as AP found MC.

     

    Thank you



  • 2.  RE: Dual ethernet port AP535 configuration best practices

    Posted Mar 22, 2021 07:11 AM
    Hi,

    maybe too late for your question but we have a same situation, and here's how to rid of storm nightmare when install AP in prod network:

    1. configure switch port for AP535-eth0 and AP535-eth1
    2. disabling the port which connected to AP535-eth1
    3. install AP535 physically
    4. configuring MC(MD) for new AP
    5. make sure AP is installed correctly in MC(MD)
    5. enabling the port which connected to AP535-eth1

    by the way our aruba rep/SE says there are no layer2 loop issue found AP535 in Dev environment they confirmed, but actually it always happen in our environment. I wonder someone has same circumstances and best practice for this. the list I wrote above is just a workaround method I'm sure.

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    Yusuke Tatematsu
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  • 3.  RE: Dual ethernet port AP535 configuration best practices

    Posted 4 days ago

    Yusuke, 

    I am glad you mentioned this. We have several AP515 that have also created broadcast storms (loops) when both ports are plugged in. Even though the Aruba 2930F switch has loop protect enabled, there are zero entries in the log about a loop condition, however much as you have experienced, the AP is creating a loop. I have tried unsuccessfully to re-produce this problem in a lab/isolated environment. 

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    Tim Mann



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    Tim Mann
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  • 4.  RE: Dual ethernet port AP535 configuration best practices

    Posted 4 days ago

    Yusuke, 

    Thank you for posting your experience. We have several AP515's in a customer's production environment that created a loop as well. Even though the Aruba2930F switch has loop protect enabled, and there is no mention of a loop in the switch logs either. We have tried unsuccessfully to recreate the same conditions in a lab. 

    ---

    Tim



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    Tim Mann
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  • 5.  RE: Dual ethernet port AP535 configuration best practices

    Posted 4 days ago
    Hi,

    You need to use active LACP on the link aggregation for the AP. This will make the AP detect the LACP packets during startup and form a link aggregation as well. 
    If no LACP packets are seen from the switch the AP will use both ports in an active-standby mode. If this is not the case, I would consider it a bug. 

    BR
    Florian

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