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  • 1.  Advice on how to troubleshoot bridged SSID - slow throughput rates

    Posted Oct 27, 2021 09:18 AM
    Hello,

    AOS 8.7.1.5
    10x MD active cluster
    7x MD backup cluster

    One of our customers (a department in the University)  has a bridged dot1x SSID on our APs (we have to provide bridged SSIDs to quite a few of the departments and colleges because of the federated nature of the university, and because we don't have a better solution in place yet, believe me we would love to get rid of them if we could!). They have reported that on occasions over the past couple of years the performance on that SSID is very poor (there have been times where they have reported it, then we have performed an unrelated upgrade and the problem seems to be 'solved', only for it to return some months later). I have previously been to the location and confirmed that speeds on that SSID are very poor (though as I say, this is not alway true).

    Our view on this is that we have lots of bridged SSIDs and we only get reports of issues from this particular customer, so the feeling is that it could be LAN related (the customer runs the LAN, we just bridge onto it) - however the customer says they are confident the LAN is not at fault. Are there some commands I can run when I have a client connected to that SSID that will tell me if the AP is doing anything funky like throttling traffic? We just want to be able to say that as far as we can tell our system is not at fault here (or give us something to work with if the APs _are_ doing something odd).

    Any advice much appreciated.

    Thank you,
    Guy

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    Guy Goodrick
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  • 2.  RE: Advice on how to troubleshoot bridged SSID - slow throughput rates

    Posted Oct 27, 2021 09:36 AM
    Since the traffic does not pass through the  controller, your ability to troubleshoot is more limited.  I would test responsiveness of pings from the wired side.  99% of the time sporadic performance issues is because of bad RF (cochannel interference).

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    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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  • 3.  RE: Advice on how to troubleshoot bridged SSID - slow throughput rates

    Posted Oct 27, 2021 09:45 AM
    Thanks Colin - yes ok makes sense, out of interest does bridged traffic bypass the AP firewall?

    I'll try some ping tests, and have a think about the interference

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    Guy Goodrick
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  • 4.  RE: Advice on how to troubleshoot bridged SSID - slow throughput rates

    Posted Oct 27, 2021 10:00 AM
    Bridged Traffic is using the AP firewall.  ACLs in roles are enforced in the AP.

    Ping tests from the wired network are only to determine responsiveness of a client at that specific time.  If you have Airwave, you could look at the channel utilization observed by that AP radio at the time users are having issues and compare it to other times to rule out cochannel or other interference.

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    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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  • 5.  RE: Advice on how to troubleshoot bridged SSID - slow throughput rates

    Posted Oct 27, 2021 10:04 AM
    We have Airwave, so that sounds like a good place to start. Thanks

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    Guy Goodrick
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