Random Increases In Latency
Jan 12, 2013
I run windows 7 on a Gateway DX4860 desktop and my problem has been occurring for a long time. I casually play games like league of legends and I believe my problem lies within my computer rather than the network itself because my problem is latency spikes where when I start games with 90 ping, it quickly spikes to 300+ ping ~ 5 minutes into the game and then into the thousands making it absolutely unplayable. I have had this problem on 3 different internet providers and the problem still remains; HOWEVER, while hooked directly to my computer with an Ethernet cord, I have ZERO problems. The house I am living at now doesn't allow me to connect directly.
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Mar 13, 2012
Start PC.Login to Windows.Programs start. (Only Steam and Windows programs, nothing else.)PC runs normally, and starts with low DPC.After several hours of running I check the DPC and it is much higher at a constant rate.After keeping PC on all night I wake up and the DPC is way high in the yellows and reds with audio popping.Restart PC, rinse and repeat all the above.I've turned off every device that would have any confliction with this. (Also I am connected through Ethernet and I am using onboard sound. My mobo is M2N SLI-Deluxe)
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Jun 20, 2012
Since about 3 weeks ago my DSL has been getting totally random ping spikes, from under 40 to over 1500MS for minutes to hours on end. Nobody else is using my internet, I've verified this. There is nothing sucking up bandwidth on any connected device or computer, as far as I can tell through troubleshooting to the best of my ability. I tried switching to a Cisco X2000 modem/router combo and it did nothing, still totally random latency. Also, when I called AT&T about this, they didn't even know what ping was. They ran an upload/download speed test (which is still mostly consistent regardless of latency) and told me I was basically making the issue up.
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Jun 1, 2011
Cisco 3845 router (256RAM / 64Flash), increases the cpu utilization upto 70~80 percent, during the time of high utilization, I am unable to run show command on router.The configuration is simple, this is connected with two internet links (24Mbps and 8Mbps) and its about 600~700 users are using internet.show version, show memory and show process cpu outputs are attached here.
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Dec 29, 2012
Network running about 60 computers, most of which are running windows 7 professional. Some are on a domain, some are not.At (seemingly) random times, some computer on the network will lose the ability to browse websites (including the web interfaces of networked devices). I can't identify what circumstances cause this to occur. I only find out about it when someone calls me.From the affected computer:I can ping sites I can ping our Cyberoam UTM (which acts as our DNS, DHCP, and firewall)disabling/enabling connection doesn't fix the problem releasing/renewing ip doesn't fix the problem flushing dns doesnt fix the problem uninstalled antivirus on two test machines, problem still randomly manifests.replaced the Cyberoam with newer model users have claimed that if they wait a long period of time (40+ minutes) the problem sometimes resolves.rebooting the computer resolves the issue until it randomly occurs again changing the computer's mac address also resolves the issue until it randomly occurs again.
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Feb 22, 2012
I play an online game, and latency is critical. I usually play at one server, and typically I get around 100ms ping. Today, when I joined the server I noticed my ping is now 40-45ms. My IP has not changed, internet service has not changed, service of server has not changed. It's almost as if the latency *just got better*. I know there are probably a huge number of factors regarding this, but I'm wondering how I could investigate this. Preferably, I'd like to keep my latency at 40ms, but I have no idea how it got there.
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Sep 10, 2011
I have reason to be suspicious as to the game's relevance. These spikes are characterized by no packet loss, as measured by pingplotter and winmtr (more specifically, there is packet loss, but I've come to understand that because it does not continue on to subsequent jumps it's not an issue), and latency leaping to between 250 and 600ms across multiple hops, seemingly without pattern or form, for intervals
Here are some summaries of some extended pingplotter sessions. The suspicion that this is not entirely WoW related is recent, so I'm working on seeing if I can get similar results from some other sources.
[code]...
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Aug 14, 2011
Over the last couple of weeks I've been noticing high amounts of jitter and latency over my home network. I've come to some conclusions but am not 100% sure if they are correct or not.When one computer on the network opens a web page, loads a video off youtube or downloads something all of the computers on the network have considerably increased latency for a short period.I've tested 3 computers over WiFI watching ping commands and will show some below in a moment. Tested 1 computer using ethernet to connect to the router and its still affected by the issue. Ive also actually used the router to ping an outside source while the ping is increased and this is also affected. This has only been happening for the last 2 weeks.
Heres a list of hardware being used/software and os.
Windows 7 with a Belkin G enabled usb NIC
Windows XP with a realtek rtl8139/810x
Windows 7 (Friends laptop)
Router = Netgear dg834g
Settings
[code]...
So I've read up on QoS and understand that my router doesnt support it but I still dont understand how 1 person using youtube can affect my network that much. As before 2 weeks ago it did not affect it what so ever, and it didnt in my old house either. So what this means is that browsing is fine on the network, just whenever you try and play a game or anything that requires low latency anyone touching the network means you get massive jitter.
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Aug 24, 2011
I recently built a new computer, this computer is running Windows 7 (64 bit), playing games such as World of Warcraft I get from 250-350 ms Latency, on my old Windows XP built hooked to the same router gets about 80ms stable.
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Jan 26, 2012
When I play games that are downloaded to my PC from Aeria games I run into intermittent latency. It happens every 6 minutes and last for about 4 minutes so for every ten minutes I get to play about 6 minutes. It only happens with Aeria games; all of them.Is this an issue with my connection to the server or is it possible that it is due to security software?
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Jun 25, 2011
About two days ago my latency to games and when I ping sites such as google I would have about 20-30ms more than usual. But my ping is steady and doesnt fluctuate, so say I would normally have 70ms to a game server I would now get 100 or so. I have tried all the standard things such as as resetting my router but to no avail. Also nobody else is on the connection only me. Normally I would ping google and get a 19-21ms response time and now im getting about 36-38 screenshot below.
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Dec 23, 2012
we just switched to a DIR-655 from a terrible Rosewill router a few weeks ago. We've been having some problems, and I've been trying desperatly to figure out what exactly is causing them so I can fix it.
Problem:
The router will periodically, and seemingly at random, dive into huge latency spikes. As of writing this, I am running a one thousand ping latency run from CMD, and I've watched response times go from 15ms average to 300ms average. The time of day seems irrelevant, as is what anyone on the network is doing. After a fresh restart of the router, everything runs smoothly for about 10 minutes, at which point everything goes ham.
Details:
I am using a DIR-655 D-Link router with a Cisco DPC3008 modem provided by Comcast.
Router P/N: BIR655ANA....B1
Router S/N: F35F5BC0019A777
Router Firmware: 2.10NA
Connection Type: DHCP
I've run the Modem directly into my PC, the connection is perfect. I've hard resetted multiple times, as well as run it with all of the above settings on/off. Updating the firmware does nothing. I've moved the router/modem apart so as not to cause signal interference.
Things I Can Try
I want to try running the router with wireless disabled to see if some sort of interference is being caused by the other computers on the network, or if one of them is hogging bandwidth.
I want to try running a program that can monitor or analyze each stage of the connection to see where the problem is.
I want to downgrade to an earlier firmware.
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Jan 4, 2012
So I am at a bit of a loss here. For the past week or so, I have been getting random spikes of high latency in online games like World of Warcraft/Star Wars: The Old Republic/League of Legends/etc and I have no idea what could be causing it. My ping used to run around 30-80 and lately is has been spiking from 100 to over 700 randomly. I have tried everything I could think of like not using my router, power cycling my modem several times, making sure my drivers are updated, no programs in the background causing it, no firewalls/anti-virus programs causing it, and several other little things like that. I have also called my ISP and they said everything seems to be working fine. And here's another weird thing, according to speedtest.net, my service is running as it should be: [URL]. The server my service is connecting to is in the next town over which is ~15 minutes away so that couldn't be it either.
Here is my system specs:
OS Version: Microsoft Windows 7 Ultimate, 64 bit
Processor: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz, Intel64 Family 6 Model 26 Stepping 4
[Code].....
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Sep 7, 2011
my latency values are extremely high, sometimes millions(!) of microseconds. THe problem is always solved by disconnecting the 11b/g wireless LAN adapter, or the Intel(R) Gigabit Network connection. However, I can't work without internet.
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Jun 9, 2012
I've got a new PC which is now about 4-5 weeks old. It worked great in the first 2-3 weeks, but then the network connection started to be unstable. That means that the connection is lost regularly (in intervals between 15 seconds an several minutes). After it is lost there's an immediate reconnection attempt, which usually is successful. So the connection downtime is mostly inbetween 2-10 seconds. Now that does bother me pretty badly. Especially in online games this leads to many disconnects or lagspikes of up to 10 seconds.
The connection losses always come paired with DPC latency spikes.I switched the LAN cable just to be sure. I updated all drivers (including BIOS). I deactivated all eligible components in the device manager one by one. The only thing I found out: If I disable the network adapter, the latency spikes are gone. But that doesn't work because the connection is gone too. For that network adapter I tried different drivers, various versions from Shuttle and also the latest original driver by Realtek.
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Jan 20, 2011
As of late whenever I, or any of my roommates, browse the internet we have noticed a slower browsing experience, where pages used to load instantly, there is now a noticeable delay in accessing web pages. Also, in playing online video games, whether it be on the PlayStation 3 or PC gaming, high latency is always present. The problem is present whether there is one computer connected, or five, Mac or PC, Wireless a/b/g/n or if connected through the ethernet port. What I ask is: What causes such behavior, and what can I do, if anything, to resolve this issue?
Running a DGL-4500 D-Link Router with Comcast service.
A trace route to google shows the following:
C:UsersAdministrator>tracert www.google.com
Tracing route to www.l.google.com [74.125.224.52]
[Code].....
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Feb 19, 2011
I have one hub router connected to an ISP cloud and then a spoke router connected to the same ISP cloud. There is a dmvpn connection from the spoke to the hub router and i have attempted to do a few tests from the spoke to the hub router.
When i do a ping from the wan interface (tunnel source) of the spoke router to the wan interface (tunnel source) of the hub router i get a return time of about 700ms on the average. However when i ping from the LAN of the spoke to the LAN side of the HUB, my return time increases to 1000ms and sometimes as high as 3000ms. I suspect the hughes modem HN7700 on the wan side of my spoke to be the cause of the problem.
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Apr 16, 2013
I am wondering what is Latency value for Cisco ASA 5585X and 5555X . I can see on websites that it says "low latency firewall" but I dont see any value.
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Apr 26, 2012
We used the SG 200-26P (firmware 1.1.1.8 ) as our main LAN switch. We have a few other 100Mb switches but our servers and nodes in our cluster are all on this switch. If you log onto a machine on one of the other 100Mb switches and then Remote Desktop to a virtual machine that is running off the SG 200-26P, and then copy say a large file (500Mb) your you will get major delays in the response time. For instance mouse clicks, screen paints, etc. Remote Desktop to a VM is unusable during this time period. This also happens for instance during backups when files are being copied from a machine to a VM.
As mentioned the other switches are 100Mb switches from HP, a bit old. I didn't change much in the setup of the SG 200-26P our of the box. Jumbo frames is disabled, RSTP is enabled, with Flooding for BPDU handling.
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Nov 8, 2011
I have installed a Catalyst 3560 as my internal router. I have created 4 vlans to route the traffic.
Here are the interface "show run"
vlan internal allocation policy ascending
!
interface FastEthernet0/1
switchport access vlan 2
switchport mode access
spanning-tree portfast
[code].....
I have been getting notifications of large packet loss and latency for itnernal traffic going to servers. I have a simple setup of nagios who pings servers and will notify me of large packet loss or complete packet loss. I have implemented this L3 switch a few hours ago, I am currently running a constant ping to my servers, but I am not niticing packet loss right now.This packet loss happened 4 time spans within the last hour of many large packet losses to all my servers within all subnets. It is now stopped.
I am not sure why this would be happening, the predessor of the internal router was just a normal linux box with 3 NICs on it. Nothing crazy going on since the business is closed.
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Apr 21, 2013
I have an end user who uses the Anyconnect VPN client to connect to our network through an ASA5510. He has a satellite ISP provider and is experiencing latency issues. Since latency issues are inherent with satellite services and since he has no other ISP alternative, any tweaks that may boost performance/reduce latency with his connection. Typcally, he sees slow performance and also network drives being intermittently available on his Windows 7 computer. he also has an internal wireless router at his home when he connects remotely. Performance when connected through a standard cable broadband connection is fine.
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Apr 17, 2012
When using this laptop (Toshiba Satellite C660D-1GD) on the forum it seemed unusually laggy when changing pages, whereas when using my Toshiba Satellite L450D it is always more positive.Decided to do some ping tests via the cmd prompt (after checking the error count via telnet) and they were in the hundreds.The L450D ping tests are spot on so I know it isn't the router (Billion Bipac 7800N)Been the usual route, totally uninstalled the wireless adaptor (Realtek RTL8188CE Wireless LAN 802.11n) including the Cisco elements, Eset and MBAM full scan and downloaded chipset drivers. Even factory reset the router and deleted the wireless profile including reg entries as a last resort.After each of those operations (other than reinstalling the wireless adaptor) the latency would be spot on and continued to be after an immediate reboot, but logging on a couple of hours later or the following morning, they would be very high again.After reinstalling the wireless adaptor for the second time, on a hunch I removed the Ethernet cable and run another test. The latency came in high but when I re-ran the test wired, they were spot on.
Phoned up KnowHow techs and read off the numbers who then put me onto 2nd level tech. He remotely connected and ran a couple of ping -n 50 tests as well as a tracert but was unable to replicate the results I was gettiing. As nothing was broken (for him), nothing to fix but to phone again if it continued.I rebooted after the phone call and got the high latency straight off. I wondered, as the latency returned to normal after certain operations I'd done, whether the remote connection had the same effect.Having been on the phone for 55mins, I'd had enough.These are two tests I've recorded from today which are together in one Wordpad doc, so you'll be able to see what I mean. Ctrl+C has been a bit erratic so they are the only ones I've been able to save. [code]
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Mar 21, 2011
last weekend i configured HSRP on our default gateway(Cisco 2600) and now i have the problem that the latency is constantly at 3ms and from time to time it goes up to 10 ms. Is that something i should have expected or is there someting wrong with my configuration? The standby ip adresses are the same adresses as the router interfaces had before and the CPU utilization is at 10 % so i do not know what happend here. I atached the config file so if you need further information i will gladly provid it.
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Feb 23, 2012
What is the switch latency for a SG302-8P for L2 and L3 packets?
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Apr 26, 2012
I have an asa 5510 that has many(17)ipsec vpn site tunnels on it. One of the tunnels, one running to a c1900isr at the other end, is experiencing 400 to 500ms latency through it. It does appear to be the tunnel only because there is no latency to the internet. I cleared the tunnel group out and readded it to no effect. isp says everything fine. any other known causes for this
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May 21, 2013
-WLC 2504
-AP1602
-SW 7.4.100.0
We have 22 x AP1602.5 of them show up in the WLC with Controller Association Latency of around 1 minute and 10 seconds.The other 17 all have latency around 10 seconds.
1. What are possibile causes for high value of association latency?
2. Could high-value association latency be an indication of badly working wifi for data traffic?
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Jul 11, 2013
I'm trying to debug a latency / bandwidth issue with 2 servers ( DELL 860 ) connected by infiniband. Servers use 10Gb cards connected on a MTS2400, here are the result for bw and latency: [code]
Are those values 'normal'? I was hoping to get more bw and less latency.I'm using CentOS 6.4 with ib_ipoib driver, it's using stock settings.
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Feb 14, 2011
I have Comcast cable going through a Netgear wireless router (WNR1000V2) with 2 PC's connected to it. (both desktops are wired directly to the router)When ever my computer is on and I game, I get a steady low latency ping, usually <50ms.But when my roommate turns on his PC, every 5-6 seconds or so I get a surge upto ~250ms.I disconnected the ethernet cable from his PC while I was gaming and the surging stopped and I had a very smooth connection. But as soon as I plugged it back up I started getting horrible ping. This leads me to believe that some program on his PC is interrupting the internet latency.
I am completely lost on how to track down what is sapping my internet. His PC is not running any bit torrent clients or P2P programs at all.We both are on a 2 month old copy of win7 x64.Are there any programs that I can use that would tell me what is using the internet to the point of lagging the whole network?
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May 27, 2013
\We have purchased AP 1041 and WLC 2500 and I am doing a testing on the configuration. It is fine when both AP and WLC are sitting on the same network. However, if I connect the AP to the WLC which is on another network, I found that latency is quite high when PING the gateway. Here is the brief topology.
AP (172.30.40.212) ------- (VLAN 1: 172.30.40.202) switch (VLAN 2: 172.30.41.202) ----------- (172.30.41.210) WLC
I try to plug the PC to VLAN 1 and do a PING test to the VLAN 1 interface and it causes some packet loss and high latency. [URL] If I do the debug ip udp on the AP, it seems the result is normal.
*May 28 13:53:36.951: UDP: sent src=172.30.40.212(26610), dst=172.30.41.210(5246), length=1069
*May 28 13:53:36.952: UDP: rcvd src=172.30.41.210(5246), dst=172.30.40.212(26610), length=89
*May 28 13:53:36.953: UDP: sent src=172.30.40.212(26610), dst=172.30.41.210(5246), length=685
*May 28 13:53:36.954: UDP: rcvd src=172.30.41.210(5246), dst=172.30.40.212(26610), length=89
Configuration:
AP 1041 Version: 15.2(2)JB
WLC 2500 version: 7.4.100.0
Both device are configured the static IP address manually with default setting and I do not enable DHCP option 43.
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Apr 4, 2012
I have cisco 2811 at branch and 3845 at Head office. Two link with 256 kbps bandwidthe each. I did as follows: [code]
When link 1 down, traffic change to Tunnel 2. its OK.I want when link1 flaxuate or latency high (more than 60 ms) traffice change to tunnel 2. If link 2 goes high latency automatically change to tunnel 1.
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Jan 26, 2013
Recently me and my girlfriend have been having issues with in game latency, receiving pings close to jittering to well over 300 where they were formerly in the 30-40s to identical servers. We live with a Chinese housemate who is extremely conscious of her privacy/personal space, we noticed a dirge of active ports on the router (both TCP and UDP) which seemed to have no association with any major application and assumed it was the old P2P boogie-monster. She is the only one who uses Wifi, an upon briefly deactivating the Wifi, all ping issues were instantly resolved. The bizarre thing is we still have plently of up/download bandwidth, I mean we're not swimming in a fibre optic connection but still a relatively healthy 1MB dl/70KB/s ul, more than enough for gaming.Deciding we needed a better idea of what was going on in the network, we downloaded Wireshark. We discovered a couple of things that might mean something, they might mean nothing at all:Firstly there was a deluge of random ARP requests coming from the suspect IP, something along the lines of:"who has 192.168.0.(random number) Tell (suspect computer's IP)"repeated over and over in bursts. A little googling found us this: Has Your Network been Now given that she is Chinese and is probably exposed to a lot of Chinese websites, is there any chance that this could be the root cause - could it drown the network to the extent that it produces terrible pings?Secondly there have been an inordinate amount of name queries coming from her IP to 192.168.0.255 (broadcast channel), they generally take the form of:
NBNS92Name query NB WPAD<00>
or
NBNS92Name query NB ISATAP<00>
and occasionally, it will name query my network id, leading to: (her ip being 192.168.0.3)
2144211275.734470000192.168.0.3 192.168.0.255NBNS92Name query NB (my id)<20>
2144231275.739314000192.168.0.3 (my id)TCP6658451 > netbios-ssn [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=4 SACK_PERM=1
2144251275.741325000192.168.0.3 (my id)NBSS126Session request, to (my network id)<20> from (her network id)<00>
2144271275.744124000192.168.0.3 (my id)SMB213Negotiate Protocol Request
[code]....
Now combine this with the sometimes 9-10 active ports our router assigns to her IP (which don't appear to relate to anything according to numerous port id sites), does this send out a red flag to any of you? I realize it would be so much easier if I could get access to her computer, but as I said, she is very private and timid and doesn't seem to like even having people in her room, let alone letting them use her computer.
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Aug 20, 2011
Im notice after configure the trend micro url filtering on a Cisco 2821 high latency on Http navigation, the latency on the ping for the requests shows a 245ms latency, but if i disable this feature on the router, returns to normal navigation and decrease the latency up to 70ms.
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Jun 14, 2011
I just installed a new ISR G2 3925e (spe200 integrated) in a VPN environment it works well but I lost latency (it adds around 8-10 ms in the VPN) because of " IPsec packet batching" :Queues multiple packets at the interrupt service routine level after being processed by crypto engine Reduces interrupt context switching by allowing one crypto interrupt for multiple crypto packetsIt's not very good specaly if you tunnel ToIP and/or video streamsI'm trying to find a solution how to disable it without impact other things or is there something planned soon to improve itfyi I use IOS c3900e-universalk9-mz.SPA.151-4.M.bin
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