How does 25% packet loss as found from ping test on PC reflect on wired internet connection for PC


We have a Windows 10 PC connected via a wired ethernet connection to our router.

To test the stability of this ethernet connection, we have run a continuous ping test via command line.

One of the results back have displayed that 1 out of 4 packets were lost (25% loss).

This test was initially ran to test for disconnects or problems with the wired internet connection.

What is the significance of the ping test and how does the 25% loss reflect on wired internet connection for this PC?

IP4IT StaffAsked:
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one of four is a meaningless sample especially if the 1 that was lost is the first. i.e. the destination you are pinging had to awaken from sleep or the system from which you were pinging had the network adapter configured for power saving.
ping /t /n 50 destination
and see what the ping packet loss is.
note ping (ICMP) is the lowest valued protocol meaning if there is network saturation, these packets are commonly dropped first

consider this, if you call a friend twice in any time period, and the phone is answered only once, that would mean 50% of the time you are ignored.  to have significant data, sample size is always important. the more the more significant the information.
i.e. if you have 25% packet loss when sending out 50 ping, that would commonly suggest the system you are pinging may have a large load and it decides not to respond to the pings to address more pressing, higher priority issues.

in short, your standard ping test has no effective value.
ping is commonly a simple low cost test to see whether a system is up; though, windows to guard their tcp/ip stack  often block, do not accept/respond to pings as set on the windows firewall.
Andy MIT Systems ManagerCommented:
What is the actual reason for the testing? Have you had performance issues/drops in connection on the machine in question? Are there any other machines connected to the same router - do they have the same issue? I take it the pings are to the router's IP? If you have another ping running to the internet at the same time (i.e. to or do you get drops around the same time on both router and internet connection?

As Arnold has noted, 1 drop in 4 doesn't mean a great deal. However if you're running a constant ping and getting multiple drops resulting in 25% loss (in greater than 50 packets) I would lean towards checking the connection between the PC and router (ensure cable is fully connected, replace with a different cable in case that one is broken, try a different port on the router, check adapter drivers are up to date, etc) and see if the problem persists.
IP4IT StaffAuthor Commented:
Hi Arnold/ Andy M,

Thanks for the feedback.

Does losing 50% of packets mean reduced internet connection or a loss of the internet connection?

We have a router in one building wired to a Switch in another building which also has another network switch wired to the first switch.

We have been having Wi-Fi and wired internet issues in the building with switches, mainly WiFi.

There is an Access point wired to the switch used as a WiFi access point.

The ping seems to return good results as I review it but WiFi still seems to be a problem for some devices.

The ping was carried out over 2000 times for wired and wireless internet connection, pinging, and overall it has been less than 1% loss.

- For the Windows 10 PC, wired to Switch, it would sometimes lose connection for a few seconds, noticeable when watching YouTube.

- Some devices we have would randomly disconnect from WiFi for about 10 seconds then turn back on.

- There are devices connected to the switches such as Sky Q box, Blu-ray player, etc. which seem to work fine.

- Other devices connected via WiFi such as Amazon Alexa, Harmony Hub, etc. would sometimes lose internet connection.

The main issue would be with:
- WiFi cameras where we would notice a disconnection of these quite frequently, every 10 minutes, for about 2 minutes each time but sometimes can be random and work for 2 hours
- Sky Q Box is connected by wired internet connection to two Sky Q Mini boxes (Sky Q Minis and Sky Q box in different buildings) but these Sky Q Mini boxes frequently lose internet connection for about 30 seconds each time, where it may happen every half an hour

We would to get down to fixing our WiFi and wired internet connection issues and have a stable internet connection for all devices.

Depending on what tools you have, Ping is often a quick test.
Other tools to sone Andy referred deal with measuring throughput of the wire, end to end tests. That are commonly run when installed, but might degrade over time.

Each device, switch, rputer have their max throughput (backplane switching)

How the switches and routers connected could also dictate whether there are certain types of packets that count as load on the switch pergormance, but do not provide useful info,
I.e. If all your setup is a flat network all switches on the same single network. This type means broadcasts is spread across all switches, broadcasts are DHCP discovery, etc that when generated from a client travels through all switches on the same network...

Identifying, the issue can become complex, Isentifying the paths, or possible altering the network layout.

If you could provide your existing network topology, ip segments and their network masks...

Are the switches managed such that you can monitor switch load, transfers, etc.
nociSoftware EngineerCommented:
You may also want to test with ping using larger packets. (the regular packets are mostly the minimal one.)
Some trouble (with f.e. DSL) will only show up if the load is higher (ie, more data) is moved.
ping  /l  1000  
Also if devices do a lot of DNS lookups maybe an on premises DNS cache server may help.  this will reduce latency.

WiFi will always be less reliable.
and if performance there suck. then restrict possible options, like WPA2 AES only.  Disable 802.1a standard  only allow gbn or n only if possible.
That will at least keep the transmission speeds high.

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