Unstable Internet Connection - Wired Connection Fast Internet | Community
Skip to main content
Newcomer
June 22, 2022
Question

Unstable Internet Connection - Wired Connection Fast Internet

  • June 22, 2022
  • 3 replies
  • 23 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. 

    New Member
    March 23, 2026

    anyone a teen

    tom cary
    Newcomer
    Newcomer
    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