WND3400 One PC Causing Lag On Network
Jun 12, 2011
I'm using cable (7.5Mbps) w/ unlimited bandwidth . I have 2 wired PC on the network and 4 PCs connected via wireless. My current router is a Netgear WND3400 but I had a Linksys WRT160n v3 previously.
My problem is that I've been getting very high ping in games (PC) and also on my PS3 like > 400ms over the past month but only after like 9:30pm or so. During the day it's always smooth. I called my ISP and they told me everything was fine from their end and the modem too.
1 PC on the network makes the other PCs lag even if that PC isn't downloading or using any bandwidth at all? I did some tests today, like: I open CMD and type: ping -t url... and I get like 6ms but when that particular PC is powered on, the ping increases to > 400ms.
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Oct 17, 2012
We have a NETGEAR ProSafe™ 802.11g Wireless VPN Firewall FVG318 set up at work with a static IP so we can do a Voice Over IP from our sales office.Everything works fine until I plug in a computer that is connected to our digital printer, then the PC stays on the internet for a while, then crashes the connection.Once I plug in the PC to the network, the rest of the network has issues.
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Jan 9, 2012
I am dealing with three office networks, all three have the same conflict. The error messages I get all say there are two devices assigning ip addresses. As soon as I get the computers communicating with each other, two seem to crash overnight, I suspect due to the conflict. Here is the rundown on the networks. All are windows networks - the problem I am having is file sharing mostly and printing.
Network A: server OS is XP Pro - SP3, four workstations, XP Pro-SP3, Windstream DSL and Netgear Router. I have already bridged the router on this one, and it did not correct the conflict.
Network B: Server OS - Windows7 SP1, three workstations all XP Pro SP3, ISP is Clear (formerly clearwire). Router is the old wired Linksys befsr41 v4.
Network C: server OS - XP Pro SP2, ISP - Clear, three workstations - two are XP ProSP3 one is XP Pro SP2. I have had less trouble with this network, but I suspect the conflict exists here as well.
I have tried to get a static IP address from Windstream where I have had my worst problems, but cannot seem to get one. I suspect we have the least expensive service option possible, and are possibly using a service designed for home use as opposed to business, as someone told me recently that getting a static IP address can be expensive. Is this true? Currently all networks have DHCP enabled, and the routers are set up to use DHCP. My thoughts were to disable DHCP and assign ip addresses manually.
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Aug 6, 2011
After recently setting up a new computer, my entire network seems to randomly loose internet connection. The interval between connection losses is as short as half an hour but it sometimes goes several hours without dying; the connections is lost for anywhere between 30 seconds and 20 minutes each time it dies.The new computer is running Windows 7 and is using a Roeswill USB wireless adapter, but I have tired it with a wire and the connection still dies. I am disinclined to believe that this is caused by a virus simply because this is a brand new computer that has had only minimal use; to be on the safe side, though, I did do virus scans with multiple programs, however, I did not find anything.When the connection is lost, a yellow exclamation appears on the task bar's internet access icon. If I check my available networks, my network still shows full strength. I have tried disconnecting and reconnecting but nothing happens; I don't get any "failure to connect" type errors nor do I get connection back. I have also tried physically removing the adapter/wire and plugging it back in, but that doesn't do anything either.
I am under the impression that the new Windows 7 computer is doing something to temporarily kill the entire network, but I don't know what.For the record, my modem is an old Motorola and my router is an old Netgear. Both are quite a few years old, but I don't think they are the problem as my internet was fine before I added the new Windows 7 computer. There are wired computers and wireless computers running XP, Vista, and 7 also on the network.
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May 4, 2012
I have 2 computers on a network, and 3 devices that use wifi on the same network. Basically when ever computer A is connected, every single computer or device on the network runs extremely slow, if at all. I get anywhere between 1200-2000 ping on pingtest with 2-60% packet loss. Even the speed on the "infected" computer A downloads extremely slow. I'm at a loss for this problem, everything runs slow and its because of the one computer connected to it. I have virus software on this computer, but its not the best so i'm not ruling out malware or viruses right off the bat.
Devices: Blackberry, Iphone, macbook (all wifi)
Computer A
Runs windows xp 32 bit,
amd processor
onboard video
[code].....
The internet modem runs to a router (Dlink dir615) then to a switch (or hub, if you will) and then to the 2 computers. The entire problem is solved by unplugging computer A from the system. But other than that I have no alternative.
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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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Jul 29, 2012
I updated my Mac to OSX 10.8 and now every time I try to login to my work network (a windows network) it locks my account. Each time, my sysadmin unlocks my account and I am able to successfully login one time but then, if I login again (after restart or sleep) I am locked out.
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Jan 2, 2012
I realise many people are having this issue and there any lots of threads about it all, which i have spent hours looking through forums for answers but I am not that computer savy to understand it all...Haven't really come accross the same scenerio as i am having, so here it is: Just brought a Sony Vaio Laptop running Win 7 home Premium. Have a desktop computer running xp which is connected to modem and router...Am running a D-link DSL-502T and Linksys wireless-G broadband Router, model :WRT54G.My issue is i can connect to the wireless network through the laptop but when i switch the wireless switch on the laptop every few minutes the desktop PC will drop the connection and display network cable unplugged, then goes back and fourth connecting and disconnecting every few minutes....as soon as i flick wireless switch off on laptop all is fine again.....wireless works as have another laptop running windows 7 pro and can connect mobile phone through wireless and ipad etc...I have had the internet load web pages but connection doesnt stay on...Does the same thing when i try connecting directly using network cable.
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Sep 1, 2012
I have a WiFi in my home, when this laptop is under normal load, say like streaming a 360p youtube video, all the computers in my home will experience a huge lag and it becomes impossible to surf or do any internet activity (even the causing laptop itself will experience huge pings). The weird part is that the lag is at the LAN level, it is not related to my internet bandwidth. Because when I ping my local router (192.168.2.1) with other PCs during the lag period, I get 1000-4000 ms. However, it is usually 1 ms. I tried doing a stress test on one of my normal laptops by downloading at maximum speed, the problem did not occur, there was no lag, all my PCs did not encounter that lag and I still get 1 ms when pinging the router. It is only this laptop that when it starts downloading, my network will be flooded.
Another related problem with the laptop is that every time I log off then log in and try to reconnect to my network, It will not allow me, I will have to click on the windows diagnose problem and it will be fixed saying "Problem with wireless adapter or access point".
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Aug 31, 2011
If my computer has been sitting for a while without using the internet and i open my browser the dsl and internet lights on my router shut off for about 15 seconds and no one in my house has internet and then it turns back on. this ONLY happens when it has been sitting for a while with the browser closed and my computer is the only one that makes it do it. also i don't have my computer set to sleep after a certain time, my monitor turns off after 5 minutes and that's it. i have a siemens gigaset se567 and my isp is telus.
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Jul 21, 2012
For starters I have a qwest m1000 modem and a netgear router.this morning there was a rather large thundestorm that caused my power to cut out while I was usin my computer.. once I got it back up and running the ethernet light on my modem wasn't liighting up.I reallly have no idea what to do. Everything but the ethernet is working. I can still get to my routers website but that's it, and I don't what to do there once I'm on it.Is it possible the storm messed up the settings? Or killed part of my pc/modem? On my computer the ethernet light next to the jack on the back is yelllow when its threw my rouuter, but when I plug my modem into it directly it doesn't light up at all.
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Mar 24, 2011
I'll access a site like [URL] normally the first 2 or three links will work that I click on and then maybe the third link will cause a timeout. I'll refresh the page after receiving the timeout notice and it'll appear fine. This is happening to other sites aswell. The reason I know it's the router is when I plug my PC directly into the modem, I don't receive this problem. The problem is happening with my laptop, PC and iphone. I've asked the ISP to go over the settings in my router to make sure they're all configured correctly and they say they're not trained on troubleshooting routers so they direct me to Netgear again. I don't really know what I should be looking at in the router page (I don't know much about routers/networking),
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Jul 27, 2011
I've recently added a desktop pc to the home's wireless network (using a D-Link DWA-125 Wireless N 150 USB adapter rev.A2) and it used to play nicely with the other devices. After switching out the router to an Actiontec V1000H my computer has begun losing most connectivity when the PS3 is turned on.
The pc still sees the network and there is a little activity there it seems. Everything runs fine when the PS3 is off and in the Wireless Network Connection Status display the speed is usually listed at 65-75 Mbps. But when the PS3 is turned on it reads 6.5 Mbps with the IPv4 connectivity bouncing between "internet" and "limited". Windows' automatic diagnosis is "Cannot communicate with DNS server".
I tried assigning static IP addresses to the pc and ps3 thinking there was a possible IP conflict with the dynamic addresses. Thinking there could be a conflict with ports I read up on port forwarding but my knowledge of networking is limited and I'm not even sure if that is the problem.
There are alot of other devices connected, 2 laptops, 2 iPod touches an iPhone the PS3 and now this old desktop clunker. I figure it's possible that the router is getting overloaded with everything and the PS3 just pushes my computer's bandwidth out the window but I would think that there would be some noticable drop in performance on the other laptops as well, which there hasn't.
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Sep 5, 2011
A customer reported that their router experienced spikes (high cpu utilization) every 4 hours and claims that it is caused by snmp polling of the Ciscoworks server.
The process SNMP engine is the process that causes these spikes .We think that the job responsible of this periodic high CPU utilization. It's called "Vrf Collector Job" and it's runnning every 4 hours.Below the result of show stack PID and show version
*Sep 5 12:02:43.230 GMT+1: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 56%/14%, Top 3 processes(Pid/Util): 557/39%, 488/1%, 555/0%
*Sep 5 12:02:43.286 GMT+1: %HA_EM-4-LOG: CPUTH:
Process 557: SNMP ENGINE
Stack segment 0x1CFC204C - 0x1CFC4F2C
[code]....
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Jan 3, 2013
decided first of all to connect an old router to the master (but not test) socket together with different cabling & splitter/microfilter - everything starting working almost perfectly (apart from downstream data rate was considerably lower than expected each time I connected - between about 1400 & 1600 Kbps - I have max. 8 Mbps).when I connected back my current router everything continued to be OK (apart from low downstream data rate) - until I would restart the current router and everything went back to very very slow.
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Jun 10, 2011
I have been using my DIR-655 for about 2 weeks now with Road Runner wideband services. Starting yesterday my internet became very slow and I discovered the cause was the router. I tried resetting it to factory settings and things will be fine and run smoothly for about 5-15 minutes but after that it goes back to being extremely slow. My speed tests would go from 10ms (normal) to 250-450ms. Before this issue occurred the Dlink was perfect, had full speeds. I am running a wire Ethernet connection.
I am currently using revB and tried upgrading firmware to 2.01NA which had no effect, but make my internet seemingly go back to normal for the first few minutes then nosedive again.I have also changed my speed/duplex settings in Network Config to 1gbs Full Duplex. I've also disabled QoS, and still no change. Not sure what else to do.
When directly connected to the modem everything seems fine. The modem is also the provided Motorola SBG6580 which I have called Time Warner to set the modem into bridge mode and have the DIR-655 connected to it.
With DIR-655 connected to PC
With Modem connected to PC
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Feb 12, 2013
I manage a CISCO 4404 WLC with about 46 access points across our WAN. System works very well, serving trusted users, guests etc very well.However, over the last month or two we have had an issue where we have had high load on our WAN.We have traced this down to the CISCO 4404, about 3-4 times a day, the controller connects to every access point and transmits about 5-8mb of data on port 5427. This in itself would not be a problem, but it connects to all 46 at the same time.
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Mar 26, 2012
computer keeps restarting whenever i connect my network cable.
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Feb 15, 2012
I am using virginmedia superhub which is supposed to give me a max of 30mbps. I use it wireless but am often getting fluctuations in speed - sometimes 500kbps upto 20mbps, nothing consistently close over 20mbps or close to 30mbps. I have bought a powerline kit - "develo olan 200 AV Wireless N" which has improved the speed but I still get fluctuations.
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Dec 9, 2012
I have 2 laptops and 1 desktop all connected to the same router, the 2 laptops are connected via wifi and the desktop PC is currently connected via an Ethernet cable, both laptops run windows 7 while the desktop runs windows XP and more or less every time the desktop is booted after a few minutes of normality connection to the internet is lost and the yellow triangle on windows 7 appears so to fix this I have to go into my routers settings via 192.168.1.1 and reboot which then solves the problem and all machines function as they should including the desktop.
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Jul 25, 2011
Since recently replacing my home router with a Linksys E2500, I have been getting Blue Screen of Death (BSOD) with my Company's VPN (AT&T). It only happens when I am running wireless with my E2500. If I am hooked up to my E2500 through a ethernet cable it doesn't happen. I have updated the BIOS on my Lenovo Thinkpad T410 and ensured all of my drivers are up to date. I am 99.9% sure the problem is caused by my Linksys E2500 because I have used my laptop on other wireless routes at work and school and never get this problem. I am also ensured that my E2500 has the current firmware installed and upgraded my Company's VPN to the most current level to no avail.
I am getting DRIVER_IRQL_NOT_LESS_OR_EQUAL Blue Screen of Death in agnfilt.sys.
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May 11, 2011
This only started about a week ago and everything was working fine before then. My router is causing my internet to be slow (I know this because it goes at normal speed when I am connected directly to my modem)
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Oct 28, 2011
Basically, my issue stems from the latest Boxee firmware from 2 weeks ago, that since then, its been causing my DIR 655 to reset itself, thereby disabling my whole home internet. It eventually turns back on again after a while, but the process doesn't stop.Basically, my DIR 655 is connected, hard wired to my boxee. I also have a NAS 323 hard wired to my router. I've had this setup on my boxee, reading all my movies/shows from my NAS without any issues for the past 10 months. Then the firmware from 2 weeks ago on the boxee started to cause my router to reset. I thought it was a hardware router failure, so I bought another of the same model to try that out, same thing happened though. When I rolled back my boxee firmware to the previous version, it no longer causes my router to reset.Now, besides me trying to figure out how to correctly block the boxee from updating on the router. Is there anything I can do on the router to tell it to prevent it from letting the boxee forcing it to reset? I'm on High Speed DSL. My internet provider modem is acting as a bridge to my DIR 655. Its been working fine for the past 10 months.
I've also done the following:Ensure DNS IP addresses are being filled in under Setup/Internet/Manual? You can find thse under Status/Device Info/Wan section. Turned off ALL QoS Turned off Advanced DNS Services if you have this option under Setup/Internet/Manual.Turned on DNS Relay under Setup/Networking.Setup DHCP reserved IP addresses for all devices on my router.Ensure devices are set to auto obtain an IP address.I have Set Firewall settings to Endpoint Independent for TCP and UDP..
Basically, I've put my boxee back to my previous firmware, and this doesn't cause my router to reset and disable my internet. But I don't get how/why a firmware update can trigger my router to do this?
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Jun 30, 2011
For some reason, I have been trying to use QOS for several network related jobs (VPN, streaming). It would seem that when QOS is enabled and the appropriate ports are set which a high priority, the speed of my connection drops to a crawl. When I disable QOS, I'm flying again. I have confirmed ports, and protocol types (TCP or UDP) and nothing seems to work.
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Jan 9, 2013
We installed a new ASA 5510 (ver 8.3(1)) on the weekend and since then have had one isolated email issue.Here is the situation. We have a remote office that connects to us via IPsec site-to-site tunnel. They remote in to one of our servers and from that server email themselves PDF's. They have their own exchange server for general use, but the emails sent from our server go through our exchange server of course. The received email shows the user as the sender AND receiver. This previously worked fine.Since installing the ASA though, users get the following error when they try to open the document: "There was an error opening this document. The file is damaged and could not be repaired."They tried this with a text file and the same thing occured. I have disabled SMTP inspection and have omitted the remote office from the CSC SSM scanning. This has not worked. The remote office also has an ASA 5510 (ver 8.2) but no changes were made this weekend. No updates were applied to Exchange this weekend.Previously my office was using a Cisco 1800, Cisco VPN Concentrator 3000 and Untangle gateway box. I replaced all 3 with the ASA. My supervisor is currently at this remote location and he can still email himself attachments from that particular server with no problem through the tunnel.
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Aug 22, 2012
I am a new network admin at my company, and I am investigating a problem that is on a network designed by someone no longer here. So, I can't ask why things were set up the way they were. Anyway, here's the issue:
We have 50Mbps WAN connections between locations. The WAN devices are 3750s, but the port plugged into the providers network is a layer 3 port. Config is below for one of the ports: [code]
So, these are Gig ports, but our service provider limits to 50Mbps. When we do a data transfer, we can't exceed about 20Mbps total on the circuit. The data transfers at maximum 15-16Mbps.
I'm not familiar with QoS. I've tried to read more about SRR, but don't understand it well enough to know. Are the QoS settings creating this restriction? Our provider swears that the bandwidth is allocated and its not being choked on their end. I have not taken off the QoS config to test it that way because I'm not 100% sure if its needed and serving some purpose. I don't want to break something in order to fix this.
Is the QoS causing this? Do I need to put a bandwidth statement on the port? Should we be using routers and LLQ?
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Jun 23, 2011
I have 3560-24PS-S (ios version 12.2(35)SE1) that have high CPU (almost 100%) use at every inventory collection (each sunday) or polling (each day 6 a.m) during 2 or 3 minutes.
I read on the forum, that this could be due to some mib object polling failure, and could, perhaps, be solved by upgrading the ios version or configuring view preventing the poll of the problematic object.
But what view to configure ?Is there well known MIB objects to filter ? Which ones ? I did not see any bug related to my IOS version and this behavior in the bug toolkit ... I join some sh commands (unfortunately done when no problem). I will try to obtain the output of the sh command when the pb occurs.
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Sep 3, 2011
So I just bought and recieved a new computer with the wireless WMP600N.
I turned the computer on and a had small lags every 5th second or so which, even though they are small, are pretty annoying. I then tried to look for a reason as to why this happens and what i found out was that if a turn off the wireless internet connection the lag spikes stops and if I turn it on they occour.
My computers specs are:
I7 2600k 4x 3,40ghz
Nvidia geforce GTX 570
8 gb 1600mhz RAM
WMP600N wireless-N PCI
Windows 7 64xbit
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Oct 18, 2011
I just bought a Samsung BD-D5300 Blu-ray player that allows a bunch of networking options including wireless and wired. I was using the wired option when I came across some conflicts with my network using a Linksys WRT350N v1. The Samsung conflicted with the Linksys's DHCP server. The blu-ray player turns off automatically when inactive. It was causing conflicts with my iPad 2, MacBook Pro and Motorola Atrix android phone whenever it got assigned an IP address. When I reset the router and my cable modem, it wasn't assigned an address for awhile, which fixed things, but as soon as it got an address again, it was caused conflicts by being seen as a LAN by my router. When it wasn't receiving an address, it got the automatic private IP address of 169.x.x.x. When I removed the connection with my router, the conflicts disappeared and my computers were able to access my wifi again.
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May 19, 2011
I've got a Samsung Epic 4G and whenever I leave the wifi connected on my phone at home, it seems to never go into sleep so the battery drains overnight doing nothing. If I turn off wifi and leave it on the 3G network, battery barely drains at all. Is there something in my router that could be keeping my phone awake when it's connected. I've tested it on a friends wifi network and my phone sleeps just fine, it's only when I'm connected to my DIR-655.
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Nov 28, 2011
I set up an E1200 about two weeks ago to replace our old DI-524 because our net speeds were getting throttled (the old router wouldn't support anything higher than 10mbps). The same day, we started getting modem resets (We have an SB6120). This never happened on the old router but it's constantly happening with this new one. It'll happen multiple times a day. I called Cox Tech Support and they pushed an upgrade onto the modem but it still reset. I don't think it's the router, since I don't understand why it would force the modem to reset, but this never happened before I installed it. The firmware is updated to the latest version on the Cisco site (1.0.02).
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Feb 24, 2012
I have a DSL line at work that we use to test external services provided to external users on our primary Internet circuit (Citrix, web applications, etc). Because this DSL line is for testing only, we want to lock it down so the only destinations allowed through the firewall are our own IP spaces.
I purchased a WRVS4400N for this purpose, thinking I could use the IP based ACL list to create these restrictions. However, every time I try to create an ACL, the internet slows to a crawl, and many sites don't come up at all. This occurs even if the ACL rule I add is a simple "allow any any" rule similar to the default rules.
Is this a known issue, or am I configuring something incorrectly? Here's an example of a rule I'm using (IP not real):
Action Service Source Interface Source Destination Time Day
Allow All Protocol LAN ANY 1.2.3.0/255.255.255.240* Any Time Every Day
I also get the problem with a simple allow from a single IP (mine) to any destination, without any other rules enabled.
implementation of the ACL ruleset on these routers?
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Aug 2, 2012
I'm attempting to create an erspan session between a Nexus 5000 and 6500 to get traffic from a FEX interface on the 5000 over to a sniffer off of the 6500. The Nexus and 6500 are directly connected with a 10G link, but I added a separate 1G link between the two for the erpsan traffic. I created a routed interface on the 6500, and and SVI on the Nexus. The Erspan session came up, and looked ok from both sides, but as soon as we got a burst of traffic this morning the CPU on the 6500 spiked to 99%. I used 'debug netdr capture rx' to determine the traffic was coming in from the erspan port and subsequently shut down the new interface on the 6500. why this caused a CPU spike? Here are the relevant configs from each device:
Nexus:
vrf context NetOps!
interface Vlan123
no shutdown
[code].....
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