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Ping Latency Increasing Regularly with Thin Client

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  • 1.  Ping Latency Increasing Regularly with Thin Client

    MVP
    Posted Dec 06, 2022 11:34 AM
    Hi all,

    We are testing some Dell Wyse thin clients on our WLAN and noticed an interesting pattern with the ping responses when all other connection details are very good (client health 99%). During our pings, we see them start low (5-15ms) and each response after that increases by about 20ms, until it hits around 100ms and then drops back down to 5-15ms and repeats. This is pretty consistent, we've tested at different locations with the same result. I've tested other devices on the same SSID and AP and they remain consistent with about the same latency the whole time. Here's a brief example:


    I'm not sure why this would be happening, I don't think it's the WLAN, but am curious if others have seen this and can explain what is taking place.

    Thanks!


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    Michael Haring
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  • 2.  RE: Ping Latency Increasing Regularly with Thin Client

    EMPLOYEE
    Posted Dec 08, 2022 07:40 AM
    Are you sure that this is not high channel utilization or other RF issue? It may be a client driver thing, could be related to power saving (try to disable that).
    Do you know if the clients are actively used when the ping times go up? Or if they are in fact heavily used?
    Note that ping can have the lowest priority, and ping times may go up but other protocols are prioritized and still have good response times. In practice, ping is easy but probably the worst method to test performance.

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    Herman Robers
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    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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  • 3.  RE: Ping Latency Increasing Regularly with Thin Client

    MVP
    Posted Dec 08, 2022 07:51 AM
    Didn't see similar latency with regular laptops and phones on the same AP and channel. Ch. Utilization was low in the VMC dashboard. These were not actively in use with applications, just online in a test lab. We did take one over to another location to test roaming and applications, pings did the same thing, but we had 0 dropped packets and no reported application issues at the same time, so like you said maybe it's a driver or processing thing that continues to reprioritize ICMP responses until every 4th or 5th response.

    We'll continue testing, but thanks for the feedback. 

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    Michael Haring