Multi-WAN Network Suddenly Loses Connectivity
May 21, 2011
This is my network topology. Sometimes it just suddenly loses conenctivity or traffic for unknown reasons, like the internet hangs for much time or maybe some routers just stop responding, even restarting ! Do you think there should be a Multi-WAN router that could take 4 WAN lines and give one LAN to plug at a switch for a better performance ?I know that my setup is wrong, give me your opinion about it and how to fix it .
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May 24, 2011
My primary home machine loses network connectivity for a very brief moment once or twice a day. Here's what I've observed over the past few months:
Seems to happen every 12 hours after a restart Disconnect is very, very brief. Putty sessions, online games, or other applications that require a consistent connection disconnect but it's rare that I can see a ping fail when everything else disconnects.Does not coincide with network problems on other machines (Xbox/media PC/wife's PC).
Other details about my system and home network:
Windows 7
Asus motherboard (couple generations old) with onboard ethernet
Ethernet > wired hub > wireless router > cable modem (wife's PC is connected to the same hub and does not have the problem, at least not on the same schedule)
Things I've tried (and will probably now try again just in case)
Restore network card driver (I'm in the process of finding a specific one for my motherboard)
Tinkered with power saving settings in the ethernet card drivers.
Fully up-to-date Windows install.
Static IP address reserved by the wireless router running DHCP
I'm not 100% sure, but I think this problem persisted across Windows OS upgrades (from Vista to Windows 7 a few months back)
By far the weirdest part is that it seems to happen every 12 hours. Like clockwork, I can predict that I'm going to disconnect from any persistent online connection if I know the last time I restarted my machine.
Solved:I caused my own problem long ago when trying to set static IP addresses in my home. I have a Netgear Router (WGR614v9) and I played with the Address Reservation feature. In addition, I manually set the IP address I wanted to have on my machine using the normal network card properties. Setting the IP address manually is what seems to have caused the conflict.
Finally looked in the Windows Event Viewer and the culprit was quickly identified. At time of restart and every 12 hours later, the following error appeared:
The IP address lease 192.168.1.20 for the Network Card with network address XXXXXXXXXX has been denied by the DHCP server 192.168.1.1 (The DHCP Server sent a DHCPNACK message).
I accidentally fixed it for all affected machines by changing the start address of the DHCP server on the router (increased it from 20 to 30). That seemed to kick all the manual entries out and set them back to automatic obtain mode.
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Jul 4, 2012
My internet connection goes up and down. After further investigation, I've noticed that as soon as i receive a certain # of packets, the internet connection goes down. It may be a process or application that is taking away these packets.
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Apr 11, 2013
Having just received a new Dell XPS8500 running on Windows 7 and I have the following problem: My wifi connection is turning off and the name of my network is no longer displaying in the list of available networks. This means that I am unable to access the internet or emails rendering the computer unusable as I am not on broadband (using access from another router close by). It is absolutely critical that the wifi connection is always on.
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Dec 22, 2011
I have Cyber cafe, And i'm having a problem with My 24 port Dlink "DES 1024d" switch, which has been misbehaving for few months, it looses connectivity to a pcsometimes.....when i reboot the pc, then it works again, But it keep losing connectivity to the other pc's, not at the same time, every time loses connectivity to a different pc.
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Jan 25, 2012
I have a client who has 4 computers in the house all running wireless. 2 desktops and 2 laptops. One of the laptops is running XP and after 5-10 minutes of surfing, the internet stops working while all the other computers retain a good internet connection. Repairing the connection via the taskbar icon fixes it temporarily until the issue reoccurs.
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Oct 25, 2012
Major symptom: Maddeningly intermittent wireless issues with Asus laptop after repair. Unable to connect to network after sleep or reboot on upper floors of house.
History:
1) Laptop wireless was working fine but power jack and case were damaged.
2) Sent away to Asus for free repair (pulled the HD first).
3) Got it back and seemed fine, but...
Problem:Wireless starting dropping after sleep. It's my wife's laptop and she usually uses it on the 2nd floor of the house.Routers are on the first floor. It failed the same way on both my G and N routers. Played with all sorts of settings, disabled IPv6, reinstalled drivers, checked for BIOS update. No luck . Eventually saw some event log entries that might have been associated with a bad wifi card. Ordered a new Intel 100 N (OEM model) and replaced card, same issues. Swapped card with a Broadcom 1510 from an old Dell I had. Same problem.
Tried more settings, static IP, flushing DNS, etc. Same problem.At this point the event log has nothing notable in it, no error logs anywhere the wireless card will just report no connectivity.when I work on this laptop I take it down into my office, which is on the 1st floor by my router. The laptop works flawlessly there (10 feet from the router). So my theory at this point is that Asus damaged or otherwise messed up the laptop antenna while repairing the laptop. most of the time on the 2nd floor the windows wifi icon reports a perfectly good signal, and if I boot the laptop on the first floor and walk upstairs, the laptop works fine(as long as I don't reboot or let it go to sleep).
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Jan 10, 2011
ATTACHED: My current running config with sensitive info taken out.
I have a Cisco 881 Router connected to cable modem. The router is running IOS 15.1.
I have it configured exactly the same way as an 877 router running IOS 12.1 which does not exhibit the problem. Just a standard LAN/WAN config with basic routing/firewall.
When the internet connection is lost for any reason and then re-established the router will no longer pass internet traffic unless I reboot the router.
I used Cisco Configuration Professional to configure the router. The key setting seems to be the Router Static Route. We have a static IP and I set static route with the "make this the default route" checked. Then I set forward (next hop) to the IP my ISP gave me as their gateway.
This is exactly the same way I set the 877 router using the same ISP but in a different office.
Every so often the internet is lost due to power outage or the ISP doing something on their end and every time that happens we have to reboot the router which is quite annoying.
I did not have the "permanent route" check mark checked but I do not have it checked on the router that does not have the problem either so I don't think that's it.
When I set the static route to "interface" then added the static IP of the next hop it will continue to work for incoming connections but not outgoing.
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Nov 28, 2012
Region : Others
Model : TL-WR740N
Hardware Version : V4
Firmware Version : 120320
ISP : Local PPPoE
I'm using this router for connecting 2 PCs, one lap top and few mobiles.The LAN network is always stable and never loses connection, but I'm having problems with the wireless connection. My lap top runs on wireless, and 3 Android mobiles, an xperia mini pro (problematic), xperia Tipo and Alcatel OT-908F. Almost always when I login to facebook on any of the mobiles, pictures won't show, and also youtube videos thumbnails won't show. On the xperia mini pro after 2-3 minutes of surfing, or doing anything else the connection drops, and then the mobiles can't see the wireless connection. My lap top can see it, but it cannot connect. After restarting the router everything is back to normal.
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Jan 13, 2012
In my LAN, I have always been used an Aironet 1250 for internal use and always work fine. Now, I added a 3com AP but both AP are not correct. When I turned off the AIRONET 1250, the 3COM AP settings works fine. When both are turn on, the 3COM AP loses connectivity all the time.I have heard about the overlapping channels in 802.11b/g networks.
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Nov 9, 2012
Internet connectivity on my laptop is lost shortly after beginning to upload/download files over the internet to my cloud storage provider. I also lose connectivity when transferring files to or from the laptop within my LAN to a desktop computer connected via wireless router as part of a workgroup. Connectivity is only restored once I restart the laptop or uninstall, then reinstall drivers for my wireless network card. The issue then reoccurs once file transfers begin again.The laptop is running Windows 7 Home Premium SP1. The driver for my Intel Wireless WiFi Link 4965AGN internal network adapter are up to date. I have a Linksys WRT610N ver.2 router, and an HP Pavilion dv6500 laptop.
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Mar 17, 2013
found that the problem is (temporarity) corrected after we power cycle the router.
The firmware installed in the latest published. See below:
System Information
Serial Number : NKS15481665 Firmware Version : v4.2.1.02 (Jan 18 2012 14:10:55)
PID VID : RV016 V03 Firmware MD5 Checksum : a9817f2dbdcbd6a5c109eaa21b1c3545 ystem InformationSerial Number : NKS15481665 Firmware Version : v4.2.1.02 (Jan 18 2012 14:10:55) PID VID : RV016 V03 Firmware MD5 Checksum : a9817f2dbdcbd6a5c109eaa21b1c3545
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Apr 4, 2013
I'm currently implementing Microsoft System Center 2012 Operations Manager, the curent stage of the project is to add the network devices to SCOM via SNMP in order to monitor them, I am able to add them all and monitor; however, my ASA 5510, although SCOM discovers the ASA via SNMP and adds it to the network monitoring list, it loses SNMP connectivy every 30 minutes, and 15 later it reconnect with SCOM, then after another 15 minutes it loses the connection again, and so on and so for.
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Apr 22, 2013
I have a new EA3500 router that's working great for a variety of devices* except a Windows7 laptop. 24 hours after establishing a connection, the laptop loses connectivity and it's very difficult to re-establish a connection. Usually I have to reboot the router, but 24 hours later the problem returns and Windows is unable to connect.
My router settings include DHCP client lease time set to 1440 minutes (24 hours), so I thought the problem might have something to do with DHCP lease renewal. To test this theory, on Saturday night I did ipconfig/release and ipconfig/renew and established connectivity from the laptop.
Sunday morning I spoke with Linksys support and changed several settings per their recommendation:Network mode mixed (I had it on N-only for some reason)Assigned different SSIDs to the 2.4GHz band and 5 GHz band2.4 GHz band channel is 20MHz only, using channel 95 GHz band channel is 40 MHz only, using channel 161I also power cycled the router. Everything worked fine until Sunday night, 24 hours after the release/renew, when I lost connectivity. I am not sure what to try next and whether the problem lies with the router or the laptop.
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Jan 15, 2013
RV220W worked good with QuickVPN, but suddenly lost such ability and doesn't allow connection from any Windows machine (Xp,Win7 32/64 bit)
QuickVPN is ver. 1.4.2.1
Cisco RV220W firmware is ver. 1.0.4.17
Client error on Windows XP in Log.txt :
[STATUS]OS Version: Windows XP
[STATUS]Windows Firewall is OFF
[STATUS]One network interface detected with IP address 10.1.1.165
[STATUS]Connecting...
[DEBUG]Input VPN Server Address = x.x.x.x
[code]...
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Jan 18, 2013
I wish to build a test rig in my office that will act as 2 separate geographic locations with a router at each location connecting to a make believe MPLS kind of network. I then wish for these sites to communicate with each other but obviously be on separate IP ranges .I know each site would have a router and I assume that there ideally should be 2 corresponding (provider) routers on the MPLS network. What I do not know is how the the routers at each site should connect physically to its partner router at the MPLS and also how the two MPLS routers would connect together. For example, if I wanted to later scale up to have 4 geographical sites how would the 4 MPLS routers connect together (using a switch?)?
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Feb 10, 2013
OK. I think Im going crazy here. Im studying OSPF and I'm working on the DR/BDR election process. I have a topology where three devices (RIDs 1.1.1.1, 2.2.2.2, and 9.9.9.9) are on the same ethernet segment so they need to elect a DR. 9.9.9.9 is a switch and Im using a SVI for the OSPF interface. Van't get the darn thing to show up in the post but here is the topology.URl After OSPF came up, I noticed that router2 was selected as the DR and that switch1 was selected as the BDR. I thought initially that it was a matter of timing and that perhaps router2 just came up first and the slower SVI interface came up second. Shutdown the interfaces, cleared the OSPF process, and set the OSPF router priority on the VLAN interface to 10.
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Jun 24, 2011
I'm currently using a Lenovo V360 and my issue is that my computer, which connects via wi-fi, disconnects from the network randomly. The network will be completely removed from the list of available networks. The other networks available will still be visible. I tried turning off the wi-fi button on my laptop and turning it back on, but the list of available networks still does not include the network I was recently connected to. The only way to see the network on my Lenovo is to restart the computer. The connection works perfectly after I restart. It is definitely not the network's problem because I am still connected to the same network with my other laptop. If necessary, my laptop runs Windows 7, my router is a D-Link, and the encryption is WPA.
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Jun 22, 2011
User has a laptop, takes home and uses in office.Running Windows XP. Once he comes in the office, tries to retrieve a file from his network drive connection, the laptop loses the drive connection.It will restore only if I reboot just to drop shortly after.
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Apr 15, 2013
I've recently had to switch to a wireless network, buying a brand new Netgear DGN220v3 (which works great, by the way) and an Asus PCE-n15 network adapter for my desktop pc. Now, the signal could be slightly better, but it's pretty fine and quite fast when available. The problem is sometimes the adapter just seems to "forget" all the active connections and doesn't see any connection at all for a couple of minutes. It's updated with realtek drivers, I've tried using the Asus utility as well (which installs realtek drivers anyway + a -not so useful- program)
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Jun 21, 2012
is it possible for a client to choose a WAN to use when being routed through a Multi-WAN router? Something that could be configured as default route in linux or default gateway in winxp ?Or is this decision totally up to the router itself ? [code] Could now a client on the subnet 192.168.0.0/24 choose 1.1.1.1 as a default route for example? And if not, could this be possible if the router hat some secondary internal IPs for both WAN interfaces.
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Jun 5, 2012
Recently I bought a new router, the Linksys E1550, along with a new computer, an ASUS K53S.Both performed especially well for the first week I had them, along with the wireless on my old desktop computer, but now internet connection speeds slow down to a snail like pace after an hour or two.Normally I would've put it off as bandwidth being taken up by other processes, but as a relatively avid gamer I would notice my ping shooting up to 400-900 ms, which used to be around 60 ms.
Anyway, if I reboot my router my connection speed + ping go back up to normal rates, but after maybe half an hour it'll slow down, ping will be up to 200-300, and then after a longer period of time it'll takes minutes to load web pages and ping will be upwards of 500ms.I've updated my wireless adapter's drivers, etc. all to no avail. This problem doesn't exist when I'm using my laptop outside of my home network, so I think the router is the issue.
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Mar 28, 2011
I have a problem with a client/server app: It is a web application that resides in C:inetpubwwwroot (aspx pages) of the server. The client is a Windows app that is installed into Program Files on the clients and when running receives commands from a webservice on the server. When I install it on a PC on our own test environment it communicates with the server perfectly, no matter how many times I re-boot the client, the connection never goes down. When I give the client to someone on a separate domain, they install it and everything is OK. However, once they reboot the PC (Windows XP) the connection to the server fails. The can still ping the server from the PC, they can even see the web service is up and running by typing into a browser but the connection now fails. If I get them to uninstall the client all and re-install, it is fine again. As I say, it is a reboot that breaks it (communication to the web service that is.) My problem is that I am completley blind to the setup on the client-side of those I give it to (I only email it to them, I have only been in the site once). The PC is obviously on a domain (with static ip addresses I assume) but other than that i know nothing. I think it is something similar to the way when you map a drive in Windows and then when you reboot it has lost the connection and you have to re-map it.
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Jan 18, 2012
I have a Samsung SCX-4623FW All-in-One Printer that will not maintain a connection to my wireless router a Linksys WRT160N. Samsung technicians have not been able to assist after multiple calls. They sent me to a printer repair store which reported they had no problem with the printer working on their wireless network. When I used the setup disk initially it would connect the printer to the network and I could print from my laptop wirelessly, but the connection never continued working more than a few hoursThe router has no problems in connecting to 3 different computers.
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Oct 25, 2011
Using my Acer Aspire 5750 at school my wireless connection speed will drop from around 4 Mbps to .30 Mbps. The speed will start out fine from startup and degrade over time. This happens only at school, and only on this laptop using this wireless card. My home network hold its 3Mbps down just fine. My campus has two wireless networks, one is WPA enterprise encrypted and one is open, both exhibit this behavior. Using my network credentials on another machine or using a different wireless card this machine works fine.I've updated to the latest driver and rolled back to previous ones.
This is happening on a fresh install of Windows and on Ubuntu live CD so it is not malware or something along those lines. Spoofing a different MAC address does not change this behavior. The devid is PCIVEN_14E4&DEV_4358&SUBSYS_E040105B&REV_00
It is a Broadcom Wireless N...
What could be causing this problem? Does the NIC not like the access points or vice verse? Are they any settings I should tweak? The drop in speed happens no more than 10 minutes after boot and occurs in both Windows and Ubuntu. I should add that other students don't have this issue so it is not a network wide thing. Other students get around 4mbps down continuously. Using somebody elses credentials on this machine doesn't work either.
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Nov 3, 2011
just bought a Wifi DSL Router Lynksys WAG120N and managed to connect all e-gadgets on Wifi the PS3, the Pc and my Laptop, which are all communicating even through shared drives and Mediaserver. Every time that I am trying to connect with my Sony Arc the Wifi for all connected clients is lost and the internet connection stops
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Jun 8, 2011
It's about a Linksys WRT54G with Firmware: DD-WRT v23 SP2 (09/15/06) std it started resetting it's admin panel settings once every few months, lately it does that every few days, like name of LAN network, name encryption and password of the wireless AP, IP filter setting and so on
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Feb 20, 2013
I'm a an old disabled guy who uses a hand-me-down Dell Insprion 1150 laptop running Windows XP from bed (where I spend the better part of my days these days) connected via a Microsoft Windows Network to a couple of old hand-me-down PCs in the kitchen, one running Win 2K and the other running XP.The network worked fine for a while, but then I started having problems with the PC running XP. Now when I'm working from the laptop in bed, and click on an icon representing a drive or folder or file on the PC running XP, it takes 30 seconds or longer to make the connection. And all during that time the mouse pointer on the laptop has turned into that danged hourglass. My connection to the PC running Win 2K works fine. Also, at the same time this network slowdown with the XP PC started occurring, that same PC running XP starting stalling or freezing or hanging up on shutdown. So I'm wondering if these two problems are related.
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Jan 23, 2013
I have a print shop that runs several computers on one network off of a single adapter. Last week the boss and I went out of town for some off site training leaving a single employee in charge of holding down the fort. When we came back we ran into a whole slew of problems not the least of which being that one of our graphics computers doesn't seem to want to recognize the work network anymore. It seems like the employee who we left (who, of course, "didn't touch anything") must have disconnected the computer from the network and started a new one as it is connected to one simply entitled "network". The issue I'm running into now is that when I check the network list the work network is not showing up at all. I've checked and I can ping the other computers on that network, they are all connected to the same network adapter, I just can't seem to get this one computer onto the preexisting work network.
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Apr 3, 2011
I've used the windows 7 for 9 month. One day when I came back to office. It can still connect to internet through server 2000 but can't access the public drive P:. It seems windows 7 can't locate the P: Is it any way to correct.
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Dec 27, 2012
I have an ADSL connection through Canal Digitaal, which I believe uses the KPN network. My Zyxel 2601 modem/router is usually accessed at 192.168.1.254. The following devices are connected to it: two iphones, a Macbook Air, an Apple TV 3 and a Mac Pro.all devices except the Mac Pro. Looking closer I found in their respective settings that they connect to 192.168. 2.254. All have somehow been assigned IP addresses on the 192.168.2.xxx network. The Mac Pro remains on the 192.168.1.xxx network.Going to 192.168.2.254 launches a login page for a KPN router called Arcadyan ARV7519 which is on ANOTHER SSID than my wifi network. Nevertheless, all my devices say they are connected to my network SSID but with IP addresses in the 192.168.2.xxx range.Does it have to to with the channels used by the respective routers or is there some phishing or such going on? What can I do to ensure that my devices stay on my Zyxel network?Weirdly, the SSID of the Arcadyan router doesn't normally show up in my list of nearby networks. It only shows sometimes.Also - in case it is relevant - when I try to access 192.168.1.254 from my Mac Pro I am able to log in, meaning I reach the welcome page of my Zyxel router though it takes a very long time for it to load.
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Feb 8, 2013
I have a laptop which has always connected to this wireless network fine until yesterday. The wireless network seemed to suddenly just disappear. There are three other laptops in the house which can still detect that wireless network and connect to it except that one now. I have restarted that laptop and the network reappeared and it connected. But when it was restarted again, the network showed just for a minute or so and the laptop cannot connect and then the network disappears. I've restarted it many times now and it just shows the network for a brief moment, trys to connect and then the network disappearsThis is the info for the laptop:ech Support Guy System Info Utility version 1.0.0.2OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 32 bitProcessor: Intel(R) Pentium(R) CPU P6100 @ 2.00GHz, x64 Family 6 Model 37 Stepping 5Processor Count: 2RAM: 2998 MbGraphics Card: Intel(R) HD Graphics, 1275 MbHard Drives: C: Total - 293422 MB, Free - 248128 MB;Motherboard: TOSHIBA, Portable PCAntivirus: Trend Micro Titanium Maximum Security, Updated: Yes, On-Demand Scanner: Enabled
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Aug 14, 2011
Every time I connect it it will display "window cannot connect to (name of the network)" I don't know what happened. When I use my phone turning on WiFi, it was able to connect to that wireless network and get internet. I checked my network work adapter and it was up to date.I even reset the laptop to factory settings and it still display "window cannot connect to (name of the network)" when i try to connectDetails are the router is a Cisco linksys E1000 router which the network is W2psk-psk. I cannot change or reset the router setting because I am not the admin where i do not know the password to.[CODE]
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