View Full Version : Packet Loss Locations
Just a quick query, been having an intermittent problem with packetloss during games again. Its not constant but pop up (spikes) at random times. Idid a tracert to server ip and it kept coming up with
amst-ic-1-as0-0.network.virginmedia.net as losing the packets <-- I presume this is uk as it virgin media.
another NL server i play on came up with
leaseweb-ic-129368-adm-b2.c.telia.net [213.248.91.150] as losing the packets.
I have also noticed packet loss on uk servers but fro mthe tracerts it seems it may just be random???
so where is amst-ic-1-as0-0.network.virginmedia.net ???? still losing a few packets there today.
Routers tend to have failrly low priority for icmp packets and will drop them a lot - does the loss continue after that hop? I can ping it fine with no loss with UDP packets.
--- amst-ic-1-as0-0.network.virginmedia.net ping statistics ---
1658 packets transmitted, 1658 received, 0% packet loss, time 1658598ms
rtt min/avg/max/mdev = 26.226/40.347/394.556/48.668 ms
Well its not a constant stream of losses, but usually around after 5pm to 21 pm it occurs quite alot. Pinging it and tracert seems fine to it atm but occurs the same every night so far :p its quite intermitant. i can usually feel it while on online games as it freezes for a second and peopel start sliding around.
sorry to bring this up again, its been fine past 2 days but happening frequently alot again.
if i ping straight to ip of the location its fine, but every tracert i do im losing packets there. You said the priority for icmp packets is low but would that effect online games aswell?
heres a few tracerts from tonight (its a ut game server I frequently play on, happens on others too)
C:\Documents and Settings\Mark>tracert 83.96.144.136
Tracing route to hosted.by.addwebsolutions.nl [83.96.144.136]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.1.1
2 7 ms 7 ms 20 ms 10.87.36.1
3 8 ms 7 ms 32 ms oldh-t2cam1-b-v132.network.virginmedia.net [80.5.165.213]
4 8 ms 8 ms 7 ms manc-t3core-1b-ae2-0.network.virginmedia.net [195.182.180.41]
5 6 ms 16 ms 23 ms man-bb-b-as0-0.network.virginmedia.net [212.43.163.66]
6 14 ms 14 ms 13 ms pop-bb-a-as4-0.network.virginmedia.net [212.43.162.85]
7 29 ms * * amst-ic-1-as0-0.network.virginmedia.net [213.105.175.6]
8 23 ms 21 ms 21 ms te-1-2.cr1.nkf.proserve.nl [195.69.144.214]
9 29 ms 28 ms 45 ms te-1-2.cr2.eun.nl.proserve.nl [80.84.254.46]
10 20 ms 22 ms 47 ms hosted.by.addwebsolutions.nl [83.96.144.136]
C:\Documents and Settings\Mark>tracert 83.96.144.136
Tracing route to hosted.by.addwebsolutions.nl [83.96.144.136]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.1.1
2 7 ms 7 ms 6 ms 10.87.36.1
3 6 ms 26 ms 12 ms oldh-t2cam1-b-v132.network.virginmedia.net [80.5.165.213]
4 7 ms 16 ms 26 ms manc-t3core-1b-ae2-0.network.virginmedia.net [195.182.180.41]
5 6 ms 7 ms 28 ms man-bb-b-as0-0.network.virginmedia.net [212.43.163.66]
6 23 ms 14 ms 23 ms pop-bb-a-as4-0.network.virginmedia.net [212.43.162.85]
7 * * * Request timed out.
8 21 ms 21 ms 22 ms te-1-2.cr1.nkf.proserve.nl [195.69.144.214]
9 21 ms 22 ms 26 ms te-1-2.cr2.eun.nl.proserve.nl [80.84.254.46]
10 23 ms 21 ms 29 ms hosted.by.addwebsolutions.nl [83.96.144.136]
If this is my source of packet loss should I report the location of it to Virgin Media over the phone? its been happening for more than a couple of weeks now.
Ignitionnet
13-01-2009, 22:10
Ah this old chestnut.
I see no loss on the routers behind it, so all is fine, just because it doesn't want to respond to pings doesn't mean it isn't forwarding your traffic fine, as it evidently is looking at your traceroutes.
---------- Post added at 22:10 ---------- Previous post was at 22:07 ----------
so where is amst-ic-1-as0-0.network.virginmedia.net ???? still losing a few packets there today.
amst = Amsterdam - it's in Amsix - http://www.amsix.net
General Maximus
13-01-2009, 22:20
I was going to say, you are getting your packet loss when the data goes from Virgin over to another isp, or when it leaves england and goes to holland. Maybe it is lost at sea :)
Stabhappy
13-01-2009, 22:22
As broadbandings suggested, the chances are that data isn't being lost (at that hop) at all. It's more that the priority of the ping packets is very low priority and other data is coming in at the same time.
If I ping straight to the address its normal, it gets lost in traceroutes (do pings and tracerts work differently?). Is there any more tests I could do to find out why my internet is lagging? I have done all the standard stuff of spyware and virus checks. Also connecting my computer straight to the internet has not changed anything.
Stabhappy
13-01-2009, 22:24
Spikes at random times..
Do you have anyone else using the network aside from yourself? Do you get spikes on any other servers?
Which game? More than 1 game? One particular server?
General Maximus
13-01-2009, 22:31
if you are using a wireless router is it open or do you use wep or wpa?
Happens on ut99 (found it particulary sensitive) and happens on Team Fortress 2, GTA 4 will barley join anygames. Using a NETGEAR WPN824v2 but my computer is connected with a cable. The wifi is enabled but it passworded and is using WPA-PSK [TKIP] + WPA2-PSK [AES]???? Is there anything else I should mention?
Stabhappy
13-01-2009, 23:05
just on the offchance can you borrow the modem for a half an hour and try a direct connection?
Unfortuantly the router is in the next room, my dads on early mornings at the moment (im a student living from home). I have tomorrow off if you have anything lined up for me to try, if anything I woudl like to try it at same "peak" times. usually more noticable around 6 pm till 22 pm. Im not being traffic shaped as speed tests show near 18 mb. Im just lost at places to look.
You could try running some pings and traces from tools.virginmedia.com If these are still losing packets then it is not a local issue, however it is quite unlikely, you may just see very high ping times, I don't think they will time out until over 1000ms. You can also try pinging your modem from there go to the config page at 192.168.100.1 and find the modem IP address - it wil begin with 10.
(do pings and tracerts work differently?)
Sometimes. ping on windows uses ICMP packets tracert uses ping requests with varying TTL (time to live) values to find each hop on the route - Unix like systems (like the one at tools.virginmedia.com) use UDP packets though you can also use TCP packets for both as well.
I could not find my modem ip address on the config page but would it not be 10.87.36.1 from my earlier tracerts?
Well the one I get running a trace does not match the one on the config page at all, only the fist number. I think that it might be the private ip of the default gateway, though feel free to correct me. I'm not sure what happens to the modem inthese traces.
I still cannot find no mention of the modem ip on the modem configuration? I am on the right one am I ( the one where Root Root is usually the password)? could you guide me to the right area please :)
Really can't remember where it is at the moment, might say 'status' somewhere.
Been through all the menu's and found nothing on modem ip. On status page just shows 'Aquire a downlaod stream' 'connectivity state' and 'boot state'.
on the information page just shows:
Cable Modem : Euro-DOCSIS 1.0/1.1/2.0 Compliant
MAC Address : Serial Number : Boot Code Version : Software Version : Hardware Version :
I also used that virginmedia tools to tracert some ips, what does it mean if it times out on that?
A little research reveals that the 10.x.x.x hop in the trace may be the public ip of the modem on ex NTL networks or at least was at one point for some of the network. try putting that in your browser and see if the config page shows up. If it does then it is, if it doesn't then we are none the wiser - it may not accept http connections from there though my epc2100 does.
I already tried that 10.87.36.1 ip in my browser but it just timesout and wont conenct so I guess thats not it. Been using that virginmedia tools to tracert other locations and still getting some lost packets but like some one said prolly low priority if the tracert continues afterwards?
Ignitionnet
14-01-2009, 16:42
A little research reveals that the 10.x.x.x hop in the trace may be the public ip of the modem on ex NTL networks or at least was at one point for some of the network. try putting that in your browser and see if the config page shows up. If it does then it is, if it doesn't then we are none the wiser - it may not accept http connections from there though my epc2100 does.
10.0.0.0 / 8 isn't a public network, and the first hop on the tracert is the uBR / CMTS. The modem doesn't have a public IP address, it has a 10 address which it uses to talk to the CMTS on the gateway you see as your first tracert hop.
Darn, I meant to say private when I said public, but that answers one question I had in my mind anyway, so thank you Broadbandings. Any idea how you find the private IP on these AMbit modems?
Turkey Machine
14-01-2009, 17:46
In Windows, double-click the network icon, click Details. Is it the Default Gateway or DHCP server?
not sure which network icon you mean but Local area connection status says :
Address Type: Assigned by DHCP
is that what you mean?
Turkey Machine, no, that will give the 192.168.100.1 address or your routers address.
snmpwalk -c public 192.168.100.1 IP-MIB::ipAdEntAddr
Will get it if you have SNMP installed.
Is that what I should put into the command prompt? I am not sure I have this SNMP installed, if its dont manually I dont recall installing it.
Ignitionnet
14-01-2009, 18:09
Just ping 192.168.100.1 and see if packets drop, failing that use something like Pingplotter and trace the server when you see packets dropping and put the report up on here for peeps to look at.
All too much just to find the private IP address of the modem, which you can't get in ex-ntl land anyways :)
---------- Post added at 18:09 ---------- Previous post was at 18:08 ----------
Ping statistics for 192.168.100.1:
Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 87ms, Average = 5ms
ok thanks for that, it seems fine at tthe moment when pinging but it usually starts happening around now till 22 pm so ill post some if I catch it or not.
I was suggesting he ping the modem from tools.virginmedia.com , not his pc hence the need for the 10.x.x.x IP, however it doesn't work in NTL land even if can find it. I should probably have checked that first, but I was thinking of another post.
Ignitionnet
15-01-2009, 09:07
Yeah that wouldn't have worked anyway as that IP range isn't routable on either network now I don't think, 10 ranges are inside MPLS VPNs not advertised in the public routing tables.
Just tried it with my IP and it still works, they better not remove it, I will be really annoyed.
moaningmags
15-01-2009, 12:17
I have pinged and currently do still ping customer's 10 ip address. All blueyonder customers though.
Ignitionnet
15-01-2009, 15:44
Be interesting to see if this persists after the 50Mbit upgrades, not going into details about it all but a few things change with that update.
moaningmags
15-01-2009, 16:04
Be interesting to see if this persists after the 50Mbit upgrades, not going into details about it all but a few things change with that update.
Yeah, well time will tell, the stuff you're hinting at and the 'coming soon' will no doubt appear sometime before we enter the next millenium.
Ignitionnet
15-01-2009, 17:07
Yeah, well time will tell, the stuff you're hinting at and the 'coming soon' will no doubt appear sometime before we enter the next millenium.
You'd hope by then we'll all have fibre installed to every bodily orifice or be beyond the need for it as subspace radio will be in place but time will tell.
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