Network Crashing At Random Point?
Jun 20, 2012
My router keeps crashing like it is restarting. it turns off then all the lights are beginning to turn un again after some time it repeats again and again....Last thing they did was turning down the internet speed for our Network. It worked in some time but then it begun crashing again...Then they said it was the cable in the road that could not take all the data stream... And something about and Bit error?I just dont belive the cable in the road thing because our neighbour are running 10 M/bits without a single error anytime... I am not an expert but i've found out that we are running a Sagembox or something like that. The hardware version (if that is important) is: 3DK04-02 Everybody in the house is running Win7 SP.1. If you need any more information then i will try to find them.
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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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Nov 10, 2011
We purchased this router 6 months ago. It has been working perfectly fine with no issues whatsoever up until two days ago when suddenly our wireless network disappeared from the available networks. We have all the updated firmware. Originally we tried setting up a new network, that worked for about 20 hours before the network crashed again. Once it had crashed that time, I was just planning to wait it out until my husband got home so he could assist me with it but before he arrived him the network mysteriously reappeared. That night it once again disappeared. The following morning it was still lost, so I reset the router to the factory settings using the button on the back, and once my computer detected it router again I once again set up a new network. That worked and my connection was fine for about 12 hours this time before it once again crashed. I brought my laptop to connect it to the internet via the cable, and after when I disconnected it to leave the room the wireless was back up again.
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Mar 15, 2012
I am on the internet, let's say browsing youtube, or play multiplayer games, sometimes my internet will crash and disconnect me, leaving that familiar yellow triangle with an exclamation mark. and that will stay there for about 1-5 minutes and then will reconnect me in. but sometimes it will just keep doing that repeatedly.I've tried to work it out myself, power cycling and everything but nothing seem to work.
This issue is on my laptop, and I am using wireless connectivity
-My isp is AOL (as long as I know) I live in Quebec and my broadband is from bell, well I think it's DSL or Cable, it uses the phone cable..
-My router is a linksys WRT54G and Modem is Speedstream 4200 ethernet/usb ASDL modem.
-I use AVG9, Malwarebytes. I am intending to switch anti-virus software but do not know which one is the best.
[code]...
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May 17, 2012
I have installed 4 of these units in a commercial premises offering free wifi. Since the day they were installed (5Months ago) we had connectivity issues with mobile devices. This was somewhat resolved in the latest FW 1.0.04 but we are still having random disconnections on the units every 2 - 4 days and have to reboot the units. Lately the units have become unresponsive and reset themselves back to factory settings.
What we have done so far:
Changed router models - No change
Changed from Static IPs & DHCP - No change
Turned on isolation - No change
Performed a wifi analysis to pick the best channel for each unit - Slight signal gain but still disconnects
Changed to 20Mhz only (And all other variations) - No change
I think I am left with no option but to return these for some other brand. I'm really regretting buying these units at the minute...
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Feb 11, 2012
I just acquired a Kindle Fire for my wife. Joined my Dir-655 network just fine. I have never done a firmware update (using 1.10) and have lived by the "if it ain't broke. " axiom. Dell laptops, Mac laptops and desktops, Wii, X-box, LG Cinema TV, Roku, iPad, multiple iPhones and iPods all connect and work fine (with the occasional (once a month) reboot of the router necessary). Using cable modem (bridge mode), no historic issues. Suddenly when the Kindle Fire is utilizing the network at the same time as one or two other devices, the network crashes, and a power down reboot is necessary. A Google search reveals a fair number of complaints about this across router brands.
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Apr 19, 2012
Due to bandwith requirements, we need to join a network with a RV016 to a network with an RV082 via a point to point air bridge. (VPN over adls was not cutting it) fortunatelly there is line of sight.
The info
LocationA LocationB
RV016 RV082
WAN1 ADSL modem WAN1 ADSL Modem
WAN2 DedicatedIP modem WAN2 Free
WAN3..7 free
[code]....
We need LAN-B endpoints to be able to reach servers on location A and viceversa.
We pre configured two point to point radios for the tower people to install. (we could change this configs)
Topology (crude sketch)[URL]
Our questions: best port to plug the radios into the RVs WAN ports? switch ports? What rules or static routes need to be created?
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Apr 15, 2011
I've been having some issues with my network connectivity for a while now, and I haven't been able to figure out what the problem is. I run a wired connection to an Ethernet port in the wall of my university dorm. I have verified that it is not a global network issue or an ISP issue; this problem only happens on my PC.My network connection drops/disconnects randomly throughout the day. When I say disconnect/drop, I mean that all attempts to ping or access the internet fail. A few minutes pass before the Network and Sharing center task tray icon shows a warning sign saying that my computer could not connect to the internet.This is temporarily fixed by doing an ipconfig /release and ipconfig /renew, but I have to execute these two commands about 2-3 times a day on average.
There is no exact interval between the disconnects, nor does it happen when I am running particular programs. The disconnect happens regardless of what I am doing at the moment (gaming, browsing the internet, leaving the computer idle).A month back, I installed some Windows Updates and suddenly my internet connection was almost completely broken. I was experiencing the same issue, but much more frequently. My internet would die within 10 seconds of executing any download, but Windows wouldn't recognize that something was wrong. At first I thought the ZoneAlarm, Avast!, or the SafeConnect (as required by my university) services were causing trouble but uninstalling/disabling these services did not fix the problem.I also tried reverting to my default ethernet drivers, which did nothing. I uninstalled and reinstalled multiple versions of my drivers to no avail.However, the internet worked just fine in Safe Mode with Networking, so I cross-referenced the processes/services running in Safe Mode w/ Networking against my normal startup, guessing something else was at play.After some poking around, I discovered that disabling the Server and Browser services permanently fixed the issue of instant connection death. But the initial problem I described still remains;random, less frequent internet connection drops.
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Aug 23, 2011
At first it seemed to happen everyday at the same time, but now seems completely random (happening twice a day somedays). At some part during the day while the user is busy with this system it drops the network connection. The ONLY way to get it back is by restarting via the reset button. Shutdown or even logoff just hangs. Nothing regarding that card will work or respond, you can not even disable and re-enable. I can however get the wireless to work without restarting. I've done everything I could possible think of including format and re-installing Windows. Something new I've noticed is that the user always has MS Access (in runtime mode) running while network goes down and then you can not end that process.
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Sep 15, 2012
I have a mix of devices that all access the internet via a Deutches Telkom Speedport W 723v my windows devices, HTC phone and even the iPad 2 never have a problem, but my Macbook Pro (Unibody Late 2008 model) and my iMac (Probably 2007 / 2008) keep having a problem with the network dropping out. To fix it I have to switch off Airport and switch it back on again and it re-connects straight away.The Mac OSX software albeit now rather dated on both devices (The Macbook is 10.5.8) is kept up to date using Software Update.The problem amy also now be affecting my APPLE TV2 it never had a problem before but now I cannot connect to iTunes on my Macbook using Home Sharing it just does not want to connect!!!I did try before going into the Speedport and changing channels from AUTO to channel 1 but that did not resolve it. I am going to do it again and try a different channel but logging onto the Speedport is an absolute pain, I can only login using my Macbook Pro when it is booted into Windows XP and on Ethernet as we had all sorts of problems setting it up and could only do it using IE not SAFARI and now the Speedport login only recognises 1 x PC for logging in, if you try a different device it throws a wobbly and locks up!
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Feb 7, 2013
I have been having intermittent wireless trouble. This includes Ping spiking, Wireless network drop-outs (The network stop appearing on available network list) and packet loss. This is all completely random (though very common) and is frustrating to say the least. As far as I know, the problem is not nearly as bad on other devices in the house , so I suspect that my network card has become shoddy. I have tried updating,removing,and re-installing network drivers to no avail. I have also used cmd and I have pinged 192.168.1.254, which shows random ping spikes, and some packet loss as well.
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Jan 15, 2012
We are having an issue on our domain where both internet and network connection drops at random, this lasts from about 30 secs up to a minute.The Domain server is running Server 2003 and we have afew XP and a few windows 7 machines.All of this is behind a SonicWall TZ-200 firewall.[code]
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Nov 30, 2012
Currently in place ISP WISP Point to Point network would like some pointers to exceed in doing it right. Here are some issues.ISP Fiber 50 Megs down and 50 Megs up ( Working )What Router do I use? Looking at Cisco RVS4000 at JDT Site as main router I have routers at others towers using the 10.1.19.xxx address as wans setup.Do I pull out all routers and use only one from the JDT Site?
a. Due to Port forwarding
b. Lets say main Wan is 74.144.55.159 Lan 10.1.19.1
1. Site BTT router is assign address 10.1.19.33 Lan 192.168.6.1
a. Can I setup 74.144.55.159:85 to see 10.1.19.33?
My Point ot Point radio use different IP address to separate from lan address (10.1.19.xxx) Radios (10.1.119.xxx)1. Everything is working just want to re-design everything never thought I would grow this fast with in 2 years. Hope I explain this well enought. 90% of users are out in the country without high speed internet.
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Mar 18, 2011
I am having an issue with 3 xp pc's in my network loosing connectivity to the file server. There are 4 network drives mapped to a win 2k3 server, when the user logs in everything is fine, after a while the network drives become unreachable and gives the following error - An error accrued while reconnecting (drive letter) to \servershare Microsoft windows network: The local device is already in use The connection has not been restarted” This happens from any user on only 3 boxes. The rest of the network is fine. These 3 are networked via a switch, I swapped that out for another hoping that might fix it, but nothing.
The other odd thing is the same time that the network drives error out it seems that DNS stops resolving anything outside my network. I can still ping the router and other pcs on the LAN but DNS fails to resolve any names for IE, and nothing outside the LAN can be pinged, no Google, no 8.8.8.8. How ever restarting fixes the issue for a short while. There have been no network changes and all systems are fully up to date as far as patches go. I was thinking it's got to be a ether a DNS issue (the file server is also the Active Directory Domain controller) or something in to do with the router/fire wall we use (it's a Cisco ASA 5005).
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Jul 14, 2011
We have a point to point connection going from a regional office to the main office this is provided by a Service Provider. In our office we have an ISP and what we need to prevent from happening is that if the internet drops from the ISP we could somehow re-direct the internet traffic through this point to point connection and make it so that our Internet connection is pulled from the main office. is it just a matter of re-configuring?
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Nov 25, 2012
I keep getting random moderate Nat sometimes, other times its opened. I have made a static Ip and port forwarded 4 ports that xbox uses. 88 udp..3074 both...53 both...80 tcp... Now when i test my connection on the xbox dashboard a message will come up saying make sure my UpNp is enabled, which it is and it tells me to make sure port 3074 is enabled which it is. I have restarted both my modem and router multiple times to try and fix this.
I have a linksys cisco e4200 and I recently updated its firmware which i thought would possibly fix the problem.I have talked to linksys but no luck.I have talked to my internet Cox Communication but they tell me its the router and i believe it is because when i directly connect my xbox to the modem i never get the moderate Nat. I have also talked to Norton about my virus protection because I thought maybe it was blocking some ports, but they disabled it and I still get the message.
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Apr 20, 2011
I noticed a TON of random devices showing up in my Network within Windows 7. When I say a ton, I mean 739! I am not computer illiterate, but definitely not a pro. My router is WEP password protected, so I'm not sure on earth is going on here. I thought maybe I had a torrent program open that could be affecting this somehow, but I don't..
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Jul 31, 2012
I have this laptop with a built-in Intel Centrino Advanced-N + Wimax 6250 adapter to connect to WiMAX.Right now I have a WiMAX connection at home with a simple gateway. So what I want to do right now is trying to connect to this network using my built-in adapter.I'm facing right now is that the driver of the adapter only searchs for a certain provider from the US (Clear). I'd like to subscribe to their service but I live in Argentina so that's not a valid option. So my question is if you know of a custom driver or some other way to search for my local wimax network.
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Feb 11, 2013
Wired PC randomly disconnects from network at random intervals each dayoday it has done so 3 times. The only way I have found to get it working again is to reset the router which can be inconvenient. When it disconnects all wireless devices continue to work and I have no issues like this with my wired consolesI switched to using a static IP address, since having an automatic one gave me the same results [i have since switched back to automatic]Be happy for any suggestions on how to sort this. I am using W7 OS and I'm using an Orange router. I don't know if its relevant, but when I go to reset my router I have noticed that the download light on my router is flashing like crazy when my PC has disconnected.
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Nov 7, 2011
We have a bunch of computers(70 aprox) connected to a domain. Since couple weeks ago very strange issues started occuring, internet and network access(path to network share is lost) would come up at random times and on different machines and would last for about 10-20 seconds it would re-connect again.All the computers are using private addresses.Most machines are windows 7, some are xp.Using Windows server 2003 as dc.Since the occurance is so random it's very hard to pin point the cause.
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Jul 21, 2011
I have SG200 50/50 Port Switch and the devices that connect into it are servers and workstations
Few days and until we experience network dropouts and when take a look at the switch log it gives me this?
2147483423 2011-Jul-22 16:34:53 Informational %LINK-I-Up: gi3, aggregated (1)
2147483424 2011-Jul-22 16:34:53 Warning %STP-W-PORTSTATUS: gi3: STP status Forwarding, aggregated (1)
2147483425 2011-Jul-22 16:34:50 Warning %LINK-W-Down: gi3, aggregated (1)
2147483426 2011-Jul-22 16:34:37 Informational %LINK-I-Up: gi3
2147483427 2011-Jul-22 16:34:37 Warning %STP-W-PORTSTATUS: gi3: STP status Forwarding
2147483428 2011-Jul-22 16:34:27 Warning %LINK-W-Down: gi3
Device connected to gi3 is a Web Server
This is also happening on more ports ie 20-printer, 13-Cisco Wireless Access Point, 24 File Server etc., which I don't know what is going on. With my research, it said something about spanning protocol. Is this possible to disabled?
The other cisco switch where desktop are also connected doesn't have this error.
My firmware is 1.1.0.73
Boot Version 1.0.0.1
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Jul 1, 2011
I just built a new computer running Windows 7 with an Intel 82579V Gigabit on the motherboard. Since last night while playing an online game, I have occasionally noticed sudden network failures where I either time out of my game or severely lag for 10 seconds before the game catches up.
My other network hardware and setup remains unchanged during this build.I have never had issues with my internet connectivity from my ISP.
The problem is not consistent and I'm not sure how to repeat it. I was playing my online game for several hours and then suddenly started having problems every 5 minutes with disconnecting.I can watch the network utilization in the Windows Task manager drop suddenly and then spike back when I reconnect to the game. Similar visual seen on the Tomato software on my router.
So far I've grabbed the latest drivers for the network chip from my motherboard manufacturer's website and turned off Teredo. I also made sure no power saving features were enabled on the network chip in the device manager.
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Apr 15, 2012
The problems looks like this: I'm able to browse the web without any problems until at random points of time - might be 2 hours after I turn on my PC or 5 or even half an hour the port 80 gets blocked - actually more like it hangs it self. As whatever I try to open i get "waiting for response" going and going. It's not even returning "page not found" error or anything. To top everything all other ports work fine - i can use https, ping run tracert - no problem there.
I've spend two days looking for some answer on the web but came up empty. I've scanned for malicious software with ad-awar and malwarebyte anit-malware - nothing came up. After restart of the pc everything comes back to normal but its frustrating needing to do that every now and then.
My home network looks like this: I have some broadband modem that is connected to local wifi TP-LINK router (Model No. TL-WR340G/TL-WR340GD). There are four devices using this connection - two pc's (laptops), android phone and android tablet.
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May 17, 2012
I have a Lenovo T420 with a Intel Centrino Advanced-N 6205 wireless network card that causes me some headache. It randomly gets disconnected from my router (Zyxel P-2601HN-F1) and home network, works fine though if i using cable. Right after it gets disconnected it reconnects and works fine until it gets disconnected again. I have an HP laptop connected at the same time and no problems there.It works fine in the network in our office (work laptop). I tried our IT dept but they were clueless and told me I had to figure it out by myself, as it works in the office..
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Jul 27, 2012
I got myself TimeWarner Cable, rated at around 15/1 mbps. The guy came and just connected the line from my place, ran it all around my room and plugged it into a Motorola SB5100 Modem. My AV is ESETNOD32 version 5.
My problem is as follows: Before yesterday, I had DSL (1mbps) and it never crashed on me. No matter what website I went to, the connection was stable. The DSL modem had wireless and it was 100% stable too. Here I have a (new?) cable modem that gives me a connection 15x faster but it crashes so often! When the guy set it up, he told me to get speedtests, so I ran on speedtest.net and speakeasy to get them. The sites loaded and my internet was fine. But today, whenever I try to get to those sites, my internet crashes immediately. Not only that, but I notice that when streaming HD on Youtube or elsewhere, the connection tends to crash sometime afterwards. Additionally, the connection may sometimes just crash randomly while I do just about anything.
[code]....
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Mar 20, 2011
I just registered the DIR-655. I saw it was on sale on Newegg for around $50 w/ a $15 promotional code. I decided to purchase that, and I have had it for the past 4 days. Firmware is Version 1.32NA. Hardware version A4.Unfortunately, it has been crashing once a day (I noticed it usually crashes between a window of 4:30pm and 6:30pm if that makes any difference). What happens is that it starts to slow down my entire net. That lasts for about 5-10 minutes before my entire net crashes to the point that I can't even access my router. I have to restart the router and cable modem afterwards..
Today, after the crash, I decided to connect my own primary computer straight to the cable modem. Internet started to work while connected straight to cable modem, but it was pretty slow. I did not run a speed-test so I don't know the exact speeds it was getting.Here's how my network is setup. Before I get to it, I want to say that it is a bit messy. I am removing one of the routers (the Ativa one). Goes like this:
Motorola SB5101 Cable Modem from Comcast in the basement
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Dec 12, 2011
my internet keeps crashing and is unsecured. How do i secure it to stop others using it.
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Oct 15, 2012
do we need MAC sublayer in point to point network?
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Aug 29, 2009
I just bought an LG Bluray DVD player (BD390) which is unable to find the access point in my home network.My router is a WRT54G, ver. 2.2, running firmware: Ver.4.21.1. My home network uses high speed cable with two computers on the wireless network, all working with no problems.The router is on the second floor but the two computers and the new BD390 are on the first floor - about 35 feet away. I have the wirelss security set to none and use only the specific computer MAC addresses to allow connection to this network.
I found directions in the forum for a setup using the LG BD390 but with a different Linksys router. I changed the security to WPA (AES); the Beacon interval from 100 to 75; the Fragmentation Threshold from 2346 to 2304; and the RTS Threshold from 2347 to 2307. The DVD wireless connection still failed to find my network. There is a "Push button" connection feature on the BD390 setup which I tried, but the only "button" on the router I could find was in the basic wireless setting, a green icon for the wireless SSID setup. No connection was made there either.
The recommendation connection from the LG manual is for a network cable, but that would be over 50 feet and a real pain to connect, so I would prefer WiFi.
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Aug 17, 2011
how do i start my computer from when it was purchased. it keeps crashing and it keeps showing that i am not connected even though i pay 24-99 each month
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Dec 7, 2012
I have a Dell Inspiron 1720, that uses a 1300 wireless lan, that keeps crashing. Is there a fix for this, can I replace it with another wireless lan card? Whenever I first start the computer, I would get the error message saying your wireless card had stopped working.
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Sep 4, 2012
We are in an organization of 80 users with 5 Sx300 series switches with the latest firmware (1.2.7.76). The network is mostly flat with all switches feeding into a Cisco ASA5505 acing as the primary gateway for Internet Access. Only our two 48 port POE switches have an additional vlan configured for the VoIP phones. We have one SG300-10MP that is powering 5 Cisco Aironet 1024N's that keeps crashing. A couple weeks ago it went down twice in one day. I updated the firmware and it did not have any hiccups unitl today. This issue has been consistent since we installed the switch in April. Originally the issue seemed to be caused by too much bonjour traffic causing a buffer overflow (we have over 100 Apple products). Since I updated the switch I have not seen any bonjour buffer overflow errors. Instead I get the following error when it crashes:
2147424534 2012-Sep-05 15:12:28 Emergency %SYSLOG-F-OSFATAL: FATAL ERROR: tExcTask: ABORT DATA exception ***** FATAL ERROR ***** SW Version : 1.2.7.76 Version Date: 19-Jul-2012 Version Time: 17:54:43 Instruction 0x18 Exception vector 0x10 Program state register 0x80000092 %SNMP-I-CDBITEMSNUM: Number of startup configur ation items loaded: 133 %LINK-W-Down: gi1 %LINK-W-Down: gi2 %LINK-W-Down: gi3 %LINK-W-Down: gi4 %LINK-W-Down: gi5 %LINK-W-Down: gi6 %LINK-W-Down: gi7 %LINK-W-Down: gi8 %LINK-W-Down: gi9 %LINK-W-Down: gi10 %LINK-I-Up: gi9 %LINK-I-Up: Vlan 1 %LINK-I-Up: gi1 %STP-W-PORTSTATUS: gi9: STP status Fo
The CPU and PoE supply are far from being overloaded.
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Nov 6, 2012
I have an ISR 1921. Every now and then, it crashes saying "Possible software fault". The system LED flashes amber and only a hard reset (power on/off) will reload the ISR.
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