How to Troubleshoot Packet Loss
Learn how to identify and troubleshoot packet loss issues that can cause slow internet, lag, and connection problems.
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What Is Packet Loss?
Packet loss occurs when data packets traveling across a network fail to reach their destination. When packets are lost, applications may experience delays, interruptions, or poor performance.
Example
Use this section as your baseline before working through the symptoms, commands, and fixes below.
Symptoms of Packet Loss
Common signs of packet loss include:
Choppy audio during calls
Video buffering or freezing
Online gaming lag
Slow-loading websites
Random disconnections
Voice chat cutting in and out
Step 1: Identify the Source
The first step is determining where the packet loss is occurring.
Start by testing your local network, then test an external destination.
Test Your Local Network
Find your router's gateway IP address and run a ping test.
Example:
ping 192.168.1.1
If packet loss occurs when pinging the gateway, the issue is likely within your home network.
Possible causes:
Weak Wi-Fi signal
Wireless interference
Faulty network cables
Router problems
Network congestion
Test an External Host
Next, test connectivity to an internet destination.
ping google.com
Alternative test:
ping 8.8.8.8
If packet loss appears only when testing external destinations, the issue may exist outside your local network.
Possible causes:
ISP issues
Internet congestion
Routing problems
Problems with the destination server
Step 2: Isolate the Problem
Determine whether the issue affects:
One device
Multiple devices
Wi-Fi only
Wired connections
Questions to ask:
Does the problem occur on every device?
Does Ethernet experience packet loss?
Does Wi-Fi experience packet loss?
Does the issue occur all the time or only during peak hours?
The more specific you can be, the easier it becomes to locate the source.
Step 3: Check Hardware
Inspect your network equipment.
Check:
Ethernet cables
Router connections
Modem status lights
Network adapters
Switches and access points
Replace any damaged cables and ensure all connections are secure.
Step 4: Optimize Network Traffic
Heavy network usage can contribute to packet loss.
Common causes include:
Large downloads
Cloud backups
Streaming on multiple devices
Network congestion
Try pausing high-bandwidth activities and test again.
Step 5: Run a Traceroute
If packet loss persists, use traceroute to identify where the problem begins.
macOS/Linux:
traceroute google.com
Windows:
tracert google.com
Traceroute can help determine whether packet loss is occurring inside the home network, at the ISP, or farther along the internet path.
Quick Packet Loss Checklist
Key Takeaway
Packet loss can occur anywhere between your device and the destination. Start by testing your local gateway, then test external hosts, isolate affected devices, inspect hardware, and use traceroute to identify where the problem occurs.