Cisco EPC3925 Stops Working When Wired PC Turned On / Off?
Mar 5, 2012
I have an EuroDOCSIS 3.0 cable modem from UPC Romania. It's a Cisco EPC3925, wireless modem.
My problem is that most of the time (like 80% of the time) when someone is starting or closing a PC that is connected using a wire, the whole internet crashes (wired PCs get a ! sign and the internet stops working and wireless PCs are getting disconnected completely from the network being unable to reconnect). This is solved by restarting the modem (unplugging/replugging it) or waiting for it to reconnect. I want to mention that during this process the modem lights show that everything is ok and nothing special happens.
First of all I called UPC technical support and the man there said that I should try to disable the firewall from the modem (which I had disabled already), if it won't work then to try to reset the modem to the factory settings (as I was thinking to do - because I configured the settings as I wished) and if this won't work then calling them back to change the modem.
I tried to reset to the factory settings and that didn't work at all after running tests over one week. After that I called UPC and they said that the modem is for sure the problem, they sent a technician (today) who also said that the modem is the problem. Ok ok, the technician replaced it and everything seemed to be good.
30 minutes ago my father started his PC and what should I see? Bam, internet crashing. 5 minutes ago i closed as well my PC and what should I see? The internet crashing again.
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Sep 4, 2011
I am having quite a large problem with my TalkTalk connection. Whenever i turn off my computer, internet access stops for the entire network, anyone who is conencted, however, local access is still possible.I am also having a problem with the wireless in my laptop also. Whereas every computer on my network is able to access the router wirelessly, my computer (the one that seems to chut down internet access) won't do that, i send packets, but none are received.
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Apr 22, 2012
On the basement level, and on level 2, I have in wall junction boxes where the Cat5E Ethernet wires come together. There are 6 lines that go from the level 2 box to 6 wall jacks on levels 2 and 3. There are also 6 lines that go from the basement box to 6 wall jacks in the basement and on level 1. There is also a Cat5E line running between the two boxes.I have wired all these plugs on both ends with T568B standard, and in each box they go into a patch panel. I have used a cable tester to test and make sure all these plugs are properly wired. I have also tested individual computers hardwired linked through to my router (without going through switches) and confirmed that they work that way, so I'm pretty sure I've wired it correctly.
At the second floor box, I have an AT&T 2Wire wifi router and modem, with AT&T Uverse service. I also have a monoprice Ethernet switch. In the basement box, I have another monoprice Ethernet switch (link to the type of switches I have is below). The switches are connected together via the Cat5E that runs between the boxes, and the second floor switch is connected to a free port on the back of the AT&T 2Wire Uverse wifi router.These wall plugs are not all currently used. In fact the problem I describe below occurs even if nothing is plugged into the wall plates.My problem is: when I hook up everything, so my wifi router is wired to the first switch, which is in turn wired to the 6 wall plugs upstairs as well as to the switch in the basement, and that basement switch is in turn wired to the 6 wall plates downstairs... at that point when I plug it in, my wifi stops working. Basically, whenever my router is plugged into this hard wired network, the wifi stops working. When I unplug the network, the wifi comes back (I usually reset it, not certain if it would come back just from waiting).
Interestingly, it doesn't necessarily stop working if most or all of the plugs are removed so the network is not connected (for example, if I just go through one plug instead of all of them)Does a network of wired Ethernet, even if not plugged into anything, cause some sort of a load or drain on the router that could make it stop working?
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Mar 14, 2012
I have the same problems with the Cisco EPC3925?Everytime a wired pc reboots/boots everyone on the network losses internet, also wireless is disconnected. Also everyone get unidentified network and later its set to public network.We are using a Sitecom switch LN-120. I have to unplug this switch, then restart the router to fix the problem each time. Then I can plug it in again and everything is fine.The router will not restart (does not go further then 2nd blinking LED.) if I do not unplug the switch.
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Jun 20, 2011
I have a DIR-655 with both wired and wireless connections. Yesterday, network stopped working on one wired machine while using it to surf the internet and a 2nd wired machine has not worked in 3 weeks after moving it from one room to another. Wireless connections are working fine.
-2 wired systems (Windows 7 and Windows XP), both stopped working
-2 wired Xboxes - working fine
-2 laptops, wireless working fine
-1 smart phone, wireless working fine
I've power cycled my DSL modem and DIR-655 multiple times.Power cycled computer multiple times. Tried Win7 built-in diagnostics.Tried setting up static IPs.Tried filling in preferred DHCP server address.Disabled Windows firewall. [code]
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Jun 5, 2012
I am having a trouble with my router, our modem is the one that is connected to a TV box and it comes with a wifi function(a modem with a wifi function). I am not sure how to set it up, so I connected it to E4200 which is located in another room using CAT6 flat cable and set it to "Bridge mode". But whenever I open the TV box, the wifi won't work, and when it's closed, it works. :s how weird is that. Are there any problems? The modem with wifi will always work either way I open/close the TV box, but the E4200 wifi will only work when I close the TV box. I asked my service provider about this and they tell me it's not their problem anymore.
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Jan 17, 2011
Bought a Cisco RVL200 (latest firmware included - I checked), and I've set it up to serve as the gateway/firewall for my home network. I also intend to use the VPN functionality when travelling as well as serving up content from a web server behind it. All of this seems to work the way it is intended (after quite a bit of fiddling).
The problem however is that if it comes under any sort of load it simply stops responding - physically it looks alright with the expected leds being lit, just as it would when functioning normally. It does not display the management interface, nor does it even respond to ping (which it does when it works). If I start up a bittorrent client on any of the machines on the internal network and add a torrent to something popular like Ubuntu Linux it'll usually start downloading and then after 5-15 minutes the RVL200 will have stopped responding. Tried adding QOS settings to limit the computer running the client or downprioritize this type of traffic, but that does not seem to have any effect.
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Mar 29, 2013
Every so ofter, the switch of the router just stops moving traffic between the LAN and to/from internet, though the WiFi keeps working and can still use internet.
I can still use the router's switch, and ping other computers on the local LAN, what happens is that the router stop routing wired traffic from/to internet, the rest of the issue is still the same, I opened reddit on my smartphone and there it was working via WiFi, but the would have none of it for the computers on wired LAN, not even accessing the router's page or telnet.
It is like some service or bridge between the switch LAN and the router itself dies... I'm still clueless.
The only "pattern" that I see is that my desktop is on line, because I can be not at home for 12+ HS and I can connect remotely to the server (rd p and trans droid) so I know it has internet access, but sometimes I think this happens when I turn on my desktop, like just now, this morning, but again, I feel is not every morning, trying to be more scientific about it I come here after every time it happens to record it, and also set the record straight about the issue description.
So, assuming it is not a hardware issue, because I did not had this problem in all 2011 and 2012, I do not overclock the router neither use other than default TX power level.
- How do I begin diagnosing this issue?
- If it is a known issue with this builds? I could no find it.
My goal is to be able to provide info for debugging the problem and possible finding a fix/workaround it. If it is indeed hardware failing, how do I even begin to diagnose it from that POV? The message is empty...
Even with the new build r21061 still happened two more times. Now the real problem to me, is that I cant even revert it to stock firmware, I tried even with:
- unplug router
- press and hold reset
- plug router
- keep pressing until power led blinks orange
- enter 192.168.0.1 (PC must have static IPA, i use 192.168.0.200)
Can't open 192.168.0.1 in FF nor chrome and does not even ping. [URL]. I just want to get it back to stock or do not hang up the switch-to-router(ing).
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Apr 24, 2013
i have a 876 Router, connected to the Internet and a VPN. From inside i would like to pass all traffic destinied to 192.168.0.0 255.255.255.0 to the VirtualPPP IF and al the other to the Internet (vlan2) I have created this rule, but after applying ist works only for about 30 to 60 seconds. after that only the Internet reachable. Everytime i do a clear ip nat trans * both Interfaces will work für 30 to 60 secs again...
This is the relevant part of the cfg
ip nat inside source route-map Di1 interface Virtual-PPP1 overload
ip nat inside source route-map VLAN1 interface Vlan2 overload
!
access-list 1 remark CCP_ACL Category=2
[Code].....
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Mar 5, 2012
I have a cisco asa 5010 where, during the process of configuring, the outside ports become down/down. The /0 port won't even reactivate after cycling power on the unit.Port /1 is the inside interface and it is not affected by the problems.I switched the outside port to port /3 and it worked for awhile then it stopped working. I switched it to Port /2 and the same thing.Port /2 and Port /3 are on after a power recycle but shut down completely (down/down) during the reconfiguration. It seems like a hardware failure, but I'm wondering if it could be anything else.
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Jul 19, 2012
I recently setup a site to site vpn between a asa 5510 and router 1921. It was working great all night and this morning. When traffic stopped rolling through for a few hours the tunnel shutdown. I checked the router using cisco configuration and tells me the tunnel is up. When I check the asa it does not show up in the active tunnels. Any know what would cuase it to drop? and if so what can I do to avoid it.
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Jun 8, 2011
i've an Cisco ASA 5510 with Security Appliance Software Version 8.0(2), in this ASA i've many L2L tunnels to this ASA, anda sometims new tunnels can't connect, the older tunnels still ok and working, yesterday this situation occured again and i've tried to clear all ipsec tunnels and try to reconnect again no one cames up again. At the time of this situation memory usage was about 78% and CPU is was around 5%. I've made a reload without changes and the situation returns to the normality.
At the time of the fail i've collect the outpu from debug crypto isakmp 255, the outpu was in the annexed file.
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Feb 5, 2013
I find are steps to turn on SSH access. I have quite a few customers with ASA5510's installed. SSH is set up and working fine on every one. After a period of time, you are no longer able to SSH into the firewall. Using Putty, it just sits there on a blank screen without giving a "denied access" message or a login prompt. Rebooting the firewall will solve the issue and SSH access works again. Today, I had a customer with and active/standby configuration where I had to reboot both of them to be able to log in. Most of my customers are on 8.2.software as most don't want to reconfigure for the new NAT, etc.
I'm sure others have seen this before since it appears to be occuring on almost every ASA that I have access to. Is there any fix to eliminate this or is there something that can be run from the ASDM that will grant SSH access again without just doing a reboot?
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May 17, 2011
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Mar 8, 2013
I have a Asus n55s. The wireless acts very funky. It sometimes disconnects and stops working. Sometimes, it will stop detecting any nearby wireless networks altogether. Then I have to enable and disable the wireless functionality until it starts seeing nearby wireless networks.
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Feb 5, 2013
I've been having this problem with my laptop's wifi for a while now and it's been getting a little out of hand lately that I can't deal with it anymore. I asked some friends and they seem to have the same problem too but not nearly as often as I do. Every so often, my laptop's wifi just stops working so I turn it off and then turn it back on and it starts working again. My friend says it happens very rarely to him but for me just today it happened 2 times within 10 minutes
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Oct 14, 2011
I'm having is that every few hours my TCP/IP protocol stops working. The modem lights remain normal but I can't connect to anything. The only thing that works on the internet is traceroutes at the command prompt which function normally. The solution is that I have to reboot and then everything returns to normal until a few hours later when it happens again. There are no error messages on any of my browsers. The page just goes white immediately. When I try to retrieve my email, I get a message about the TCP/IP isn't working.
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May 2, 2012
I've got the same problem on my wife's Acer One 532h. Did it get resolved for you, Adrian and if so, how?
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Mar 23, 2011
On Windows XP, my integrated NIC stops working after hosting a server. The server starts fine, ports are forwarded, firewall is down, modem is fine, but when I receive a connection, it shows they have made a connection, but then they drop, as do I. I can't browse or ping anywhere. I have to physically disconnect, then reconnect the ethernet cable to the port, or restart the computer. Upon ipconfig, the adapter is set with the Windows default ip (169.x.x.x) and cannot be /release'd or /renew'd.
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Mar 4, 2012
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Mar 22, 2012
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May 2, 2011
After buying a new WNDR370. Sporadically and seemingly without any cause my internet will stop working. Diagnostic will always report it as "DNS Server is not responding." I've also discovered that if I enter my router settings and even just switch the DNS settings from Auto to manual or vice versa the problem corrects itself instantly-then next time it happens I just need to do it again.
I've already tried resetting my entire network and rebuilding the recommended way. Modem, Router, then computers-connecting each only after the prior has finished initializing. Hasn't worked though.
Currently I have my main rig connected directly to the modem to try and find out if I experience the problem at all this way, this is a pain in the ass though, and I don't know when long enough is long enough as the issue is completely random and simply just may not happen.
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Mar 3, 2013
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May 11, 2012
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Jan 3, 2012
I have a PIX 515e (8.0 (2)) and 1841 router (12.4(25)).I had the following setup working without issue:
[Internet] <-----> PIX <-----> 1841 <-----> [LAN]
I then tried to introduce VLANs and now I can not reach the Internet from the LAN. It seems that no nat translations are taking place.
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I introduced the LAN side VLAN first and everything still worked. However, once i introduced the VLAN between the router and PIX, things have broken down. [code]
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Jun 14, 2011
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Feb 10, 2013
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Mar 11, 2011
My internet (wired and wireless) usually works fine, but occasionally (read: every few days to weeks) the connection will suddenly black out for a period of time, anywhere from an hour to a day. I have tried resetting both my router and modem, and going through all the settings on my laptop, but I'm pretty sure it's not my computer, as no other devices can connect either. During the blackouts, when I look at the modem, the internet light will turn on for a second, then go off and then the red "alarm" light (aka "something is wrong" light) starts blinking like crazy, and this keeps repeating. This resolves itself after anywhere from a few hours to a whole day and everything is normal again. The light show, and the fact that I can't find any other problems, leads me to believe that it could be a problem with my provider (or the network itself) and not a hardware or software problem, but I can't be sure of this.Also, during the blackouts, I can connect to the network, but it shows that limited connectivity symbol (exclamation mark thing) and says no internet.
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Jul 17, 2011
I have a problem with a wireless adaptor on a Toshiba Tecra (A11-1EE - PTSE0E-065052EN) running Windows 7.The wireless adaptor works fine but every now and again it will just stop working. The operating system says that the adaptor is turned off but it isn't. I've checked the driver but it is up to date.I have to disable the driver and then enable it again and then the adaptor begins to work correctly again.
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Jun 17, 2012
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft� Windows Vista� Home Premium, Service Pack 2, 32 bit
Processor: AMD Athlon(tm) Processor LE-1660, x64 Family 15 Model 127 Stepping 2
Processor Count: 1
RAM: 2045 Mb
Graphics Card: NVIDIA GeForce G210, 512 Mb
Hard Drives: C: Total - 292284 MB, Free - 43340 MB; D: Total - 12958 MB, Free - 1819 MB;
Motherboard: PEGATRON CORPORATION, NARRA5
Antivirus: AVG Internet Security 2012, Updated and Enabled
So here's my setup:Computer A is connected directly to a cable modem box via USB. Computer B (which is sometimes a laptop and sometimes a desktop) is connected to Computer A and shares its internet connection via Ethernet because I am too cheap to buy a router.A few days ago we borrowed a Belkin wireless router so we could have both desktops, the laptop, and my fiance's iPod Touch access the internet at the same time. That worked fine but once we returned the router and tried to put everything back to normal, it didn't work. The only computer able to access the internet is Computer A (or whichever one is directly connected).I tried resetting the modem and restarting both machines. I tried disabling all of the connections that showed up from using the router.Windows states that the IP isn't properly configured or something of that nature. I tried setting it to automatically set the IP but to no avail.Here is the part that really confuses me - I can access Computer B from Computer A via LAN using the ethernet cable, so the connection between the two computers is fine.
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Feb 22, 2012
I have a Comcast Motorola Surfboard rental modem. It works fine, great speeds etc etc. It has no router or bridge support.
I use this modem to connect to the web on my ps3 and PC. What I have been doing is simply unplugging the ethernet cord from one device, and putting it in the other device to switch. But of course things can't be simple...
Every time I switch devices, the modem tries to reconnect and does a cycle where every time it only reaches the "Send" light. So I have to power cycle my modem and wait about a half hour before my connection resumes...
I read something about PPPoE, but Comcast doesn't even use it so that won't work.
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Oct 11, 2012
Router randomly stops working and sometimes reconnects by it self and sometimes I have to manual reset the router. Also I only get 2-3 bars wireless. Is my router not configured properly or damaged?
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Nov 10, 2012
I have a windows vista pc networked to a second pc. I have wirelessly networked internet to 2 laptops. I have an actiontec wireless modem by verizon. All of a sudden my host pc started randomly losing internet connection, but the wireless laptops still have a signal. It seems like the host sometimes can't "see" the modem.Here are my settings while the internet is functioning.Microsoft Windows [Version 6.0.6001]Copyright (c) 2006 Microsoft Corporation. All rights reserved.[CODE]
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