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Newcomer
June 22, 2022
Question

Unstable Internet Connection - Wired Connection Fast Internet

  • June 22, 2022
  • 3 replies
  • 111 views

I'm getting lag every 2-3 minutes for about 15-20 seconds.

 

I'm on a Desktop PC which is powerful.

I'm not on Wifi, I'm directly attached to the network.

Speedtests are all super fast (gigabit ethernet, fast upload and download, latency is low teens)

I use the desktop app not through the browser.

 

All other services seem fast - Teams, Gotomeeting, VoIP phone, Discord all work no problems.

 

I'd like to try some more advanced troubleshooting (I own an IT Services business)

Are there any servers I could tracert to and test the connection over several minutes for packet loss along the route?

    3 replies

    Ray_Harwood
    Community Super Champion | Customer
    Community Super Champion | Customer
    June 22, 2022

    Have you discovered the Zoom Settings “Statistics” tab?  There’s a lot of good information on there. 

    Check out this Zoom Support article for more information:

    https://support.zoom.us/hc/en-us/articles/202920719-Accessing-meeting-and-phone-statistics 

    Also monitor Task Manager and Resource Manager to see if there is some blocking service or system process. 

    Newcomer
    March 23, 2026

    anyone a teen

    tom cary
    Contributor I
    Contributor I
    March 23, 2026

    That kind of periodic lag (every few minutes) is usually not raw bandwidth  it smells more like packet loss, jitter spikes, or routing issues specific to Zoom.

    A few things you can try that go beyond the usual basics:

    1. Test directly against Zoom infrastructure
    Zoom doesn’t officially publish “test IPs,” but you can still monitor active connections:

    • Join a meeting → run netstat -n and grab Zoom IPs
    • Then run continuous ping / pathping:

       

      ping -t <zoom_ip>
      pathping <zoom_ip>

    This helps catch intermittent loss over time.

    2. Use WinMTR (better than tracert)
    Run it for 10–15 mins to a Zoom IP:

    • Look for spikes in latency or packet loss mid-route
    • Even 1–2% loss on a hop can cause exactly what you're describing

    3. Check for ISP routing quirks
    Since everything else (Teams, Discord, VoIP) is fine:

    • Could be peering issue between your ISP and Zoom CDN
    • Try a quick test via:
      • Mobile hotspot
      • VPN (different route)
        If lag disappears → confirms routing problem

    4. Disable Zoom “smart” features
    Zoom can spike CPU/network briefly:

    • Settings → Video:
      • Turn off HD
      • Disable hardware acceleration (test both on/off)
    • Settings → Background & Effects → disable all

    5. QoS / Firewall / UTM checks
    Since you run IT services:

    • Inspect any deep packet inspection / SIP ALG / QoS shaping
    • Zoom uses dynamic UDP ports (8801–8810 typically)
    • Try temporarily bypassing firewall rules if possible

    6. Bufferbloat test
    Even with gigabit:

    • Run a bufferbloat test (Waveform)
    • If latency spikes under load → could explain periodic freezes

    7. NIC / driver edge cases

    • Update NIC drivers
    • Disable power saving on adapter
    • Check interrupt moderation settings