Check Slowness issue..

 Also refer to Ping post

• ping google.com -n 100
  

  Recommended for a more reliable analysis of latency and packet loss.

• Continuous 

  ping google.com -t   ( high traffic ) 
  

  Sends pings until you stop it by pressing Ctrl + C. Windows will then display the statistics.

Example

ping google.com -n 100

At the end, you'll see output similar to:

Ping statistics for 142.250.xxx.xxx:
    Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:
    Minimum = 18ms, Maximum = 120ms, Average = 24ms

How to interpret the results

• Average latency
  • <20 ms: Excellent
  • 20–50 ms: Very good
  • 50–100 ms: Acceptable

  • 100 ms: Noticeable slowness for interactive applications

• Packet loss
  • 0%: Ideal
  • 1–2%: Minor issue

  • 2%: Network problem likely

• Maximum latency 
  
  250 ms to 300 ms  -      Spikes 
• If it's much higher than the average (for example, average 20 ms but maximum 300 ms), it indicates latency spikes (jitter), which can cause lag in video calls, gaming, or VoIP.
  
  

🎯 1. Average (AVG) — MOST IMPORTANT

👉 This shows the normal network delay

• Represents typical performance
• Best indicator of real user experience

✔ Example:

min = 10 ms
avg = 25 ms  ← ⭐ main value
max = 80 ms

👉 So your network “feels like ~25 ms delay”

> 100 ms not acceptable.. 

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⚠️ 2. Maximum (MAX) — IMPORTANT for problems

👉 This shows worst-case delay spikes

• Helps detect instability
• High max = jitter / congestion / packet delay spikes

✔ Example problem:

avg = 20 ms
max = 300 ms  ❌ problem

ping google.com -n 100 -l 1000

• Payload = 1000 bytes

Larger packets take slightly longer to transmit and are more likely to expose issues such as:

• MTU problems
• Packet fragmentation
• Congestion
• Packet loss

For testing LAN Ethernet network : 

ping google.com -l 1472

Tests the maximum payload that fits within a standard 1500-byte Ethernet MTU without fragmentation (1472 bytes of ICMP payload + 20-byte IP header + 8-byte ICMP header = 1500 bytes).

When do we use ping -t?

1. Troubleshooting intermittent network issues (Most common)

A user says:

"The internet disconnects every few minutes."

Run:

ping google.com -t

Observe the output:

Reply from 142.250.xxx.xxx: time=22ms
Reply from 142.250.xxx.xxx: time=21ms
Reply from 142.250.xxx.xxx: time=20ms
Request timed out.
Request timed out.
Reply from 142.250.xxx.xxx: time=23ms

This shows the connection is dropping intermittently.

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2. Monitoring during cable replacement or network changes

Suppose you're replacing a network cable or changing a switch port.

Keep this running:

ping 192.168.1.1 -t

As soon as the cable is connected correctly, you'll see replies again.

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3. Checking Wi-Fi stability

If users complain:

"Wi-Fi disconnects randomly."

Run:

ping 192.168.1.1 -t

If you see:

Reply
Reply
Request timed out.
Reply
Reply

then the wireless connection is unstable.

---

4. During server reboot or maintenance

Suppose a server is restarting.

Run:

ping 10.10.10.20 -t

You'll see:

Reply
Reply
Request timed out.
Request timed out.
Reply
Reply

This lets you know exactly when the server comes back online.

---

5. Troubleshooting VPN problems

If the VPN disconnects unexpectedly:

ping 10.20.30.40 -t

You can determine whether the VPN tunnel is dropping by watching for timeouts.

---

How to stop it?

Press:

Ctrl + C

Windows then displays statistics such as:

Packets: Sent = 250
Received = 248
Lost = 2 (0% loss)

Minimum = 20ms
Maximum = 95ms
Average = 26ms

These statistics help identify packet loss and latency.

---

Scenario: A user says, "My internet disconnects every 10 minutes."

Troubleshooting steps:

1. Open Command Prompt.

2. Run:

   ping google.com -t
   

3. Ask the user to continue working normally.
4. If the issue occurs, check whether you see:
• Request timed out. → Possible network outage, ISP issue, or connectivity loss.
• High response times (e.g., time=300ms, time=500ms) → Network congestion or latency.
• General failure. → Local network stack or adapter issue.

When do we use ping -l?

1. Test if the network can handle larger packets

If users report:

• Slow file transfers
• Video call issues
• VPN problems

You can test with larger packet sizes.

Example:

ping google.com -l 1000

If 32-byte packets succeed but larger packets fail, there may be an MTU or fragmentation issue.

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2. Troubleshoot MTU (Maximum Transmission Unit) problems

Suppose a user says:

• Websites partially load.
• VPN connects but applications don't work.

You can test different packet sizes:

ping google.com -l 500
ping google.com -l 1000
ping google.com -l 1472

If larger packets fail while smaller ones succeed, it's a clue that the path MTU may be too small.

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3. Simulate real network traffic

A normal ping uses only a 32-byte payload, which is much smaller than many real-world packets.

Using:

ping google.com -l 1000

creates larger packets that better resemble typical application traffic, helping reveal issues that small packets might not.

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4. Check for packet loss with larger packets

Example:

ping google.com -n 100 -l 1000

If you see packet loss only with larger packets, it may indicate:

• Network congestion
• Faulty equipment
• MTU or fragmentation issues

Extended Ping 

You want to verify that traffic sourced from 192.168.10.1 can reach 192.168.20.10.

Use Extended Ping:

Target IP:
192.168.20.10

Source:
192.168.10.1

!!!!!!!!!!

Success rate is 100 percent (10/10), round-trip min/avg/max = 0/0/3 ms

Extended ping is commonly used to troubleshoot:

• ✅ Routing problems
• ✅ ACL issues
• ✅ NAT problems
• ✅ VPN connectivity
• ✅ Inter-VLAN routing
• ✅ Source-interface testing
• ✅ MTU and fragmentation issues

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Normal Ping vs Extended Ping

Feature	Normal Ping	Extended Ping
Destination IP	✅	✅
Choose source interface/IP	❌	✅
Change packet size	❌	✅
Change repeat count	❌	✅
Test MTU (DF bit)	❌	✅
Advanced troubleshooting	❌	✅