Question

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How do I stop intermittent but frequent, loss of packets.

By Ian Boothby ·
My internet is glitching and after a quick test using pingtest.net it says the test has failed due to packet loss, but everything else passed.
Tried multiple servers and Firefox 3 - same result.
Only had this prob for a few days now - since installing IE9 ??? Ominous or what?!

Problems are:

Buffering videos between 5-10 mins long can take up to an hour
Downloading a picture took over a minute
Webpage loading often times out - especially if httpS
Kicked from online games (BF2 series, COD series) as ping is anywhere from 30 to 300+++ (up and down all the time)
Just terribly slow in frequent glitches despite having 4.5 Meg Broadband and an initial ping of 33! (speedtest.net)

Have removed all telephones from sockets, removed all ADSL filters & plugged router directly into phoneline socket.

Can ping router OK 2-3ms no prob so LAN is OK (via PowerLine/Homeplugs)

Running W7-64 on a Q6600

What else should I do?

Thanks!

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All Answers

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roll back

by markp24 In reply to How do I stop intermitten ...

Hi,

I usuually see this when nics are set to autonegotiate so i set the switch port and nic port to non auto/auto (IE 1000/full or 100/full duplex).

in your case since it seems to have occured after an update, i would roll back (system restore) to a date prior to the issue and see if that resolves it.

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Reponse To Answer

by Ian Boothby In reply to roll back

Rolled back to a week ago when it was OK, but no difference. The other PC in the house also gives the same loss.

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Call your ISP?

by seanferd In reply to How do I stop intermitten ...

As you seem certain the problem is not in your network, it is either in the home wiring to the junction box, or the lines or equipment the ISP/telco/cableco owns, or somewhere else in their network.

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Reponse To Answer

by Ian Boothby In reply to Call your ISP?

They say they can see nothing wrong (not too interested really!!) But ran a line test - all O.K.

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try the netstat command

by markp24 In reply to How do I stop intermitten ...

Hi

you may want to try typing netstat -e at a command prompt for Windows
Interface Statistics
should see somthing like this, and will show packet loss.

c>netstat -e
Received Sent

Bytes 2198804079 3209502521
Unicast packets 38452336 21550872
Non-unicast packets 7960337 179238
Discards 528 528
Errors 0 0
Unknown protocols 0


Aslo not sure if you tried this already, but i would run a sniffer to check for packet loss as well.
www.nirsoft.com has smartsniff
or use wireshark (etherreal)

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Reponse To Answer

by robo_dev In reply to try the netstat command

I think you mean WireShark :)

My guess would be the router is having a bad day.

One thought is that if either PC has a nasty trojan virus on it, it could be totally blasting out network traffic, which can kill the LAN performance.

To check, close all browsers and apps that use the internet.

Do a netstat -an at the command prompt to see what outbound sessions are active. None should be active, unless it's either an application updating itself or a virus.

Do a netstat -b to show WHICH process is communicating. If it's a process that should not be there, it may be a virus.

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Reponse To Answer

by markp24 In reply to try the netstat command

You got me!! I should reread my posts for typos ,

Wireshark it is! :-) Your 100% right i overlooked viruses or other malware broadcasting and using up bandwidth. Good call!!

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Reponse To Answer

by Ian Boothby In reply to try the netstat command

Thanks-tried that, got this;-
bytes 1500328392 105624262
unicast 1227672 771595
non-unicast 21021 62748
all the rest zeros

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Reponse To Answer

by markp24 In reply to try the netstat command

So it looks like you may not have paket loss after all (at least from what that PC is showing) i think it may be time to check the network with a sniffer and look at thats going over the wire.

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Reponse To Answer

by Ian Boothby In reply to try the netstat command

Hmm-weird - all OK now and no loss at all. Don't you just hate it when problems resolve themselves before you've found the cause - it's always suspicious! I'll try WireShark now!
Thanks for your input peeps!

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