Cisco WAN :: 881 Loses Internet Connectivity When Cable Disconnected

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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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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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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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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HP Pavilion Dv6500 Laptop Loses Internet Connectivity When Transferring Files

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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Apr 18, 2010

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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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Multi-WAN Network Suddenly Loses Connectivity

May 21, 2011

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Dec 22, 2011

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Jan 13, 2012

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Asus A53SV Loses Connectivity Upstairs After Sleep?

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.


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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WGR614v9 / Windows 7 Desktop Loses Network Connectivity Twice A Day

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 for the Network Card with network address XXXXXXXXXX has been denied by the DHCP server (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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Nov 28, 2012

Region : Others
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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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Apr 4, 2013

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Feb 15, 2012

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Apr 22, 2013

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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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Apr 23, 2012

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There are settings in the TMobile connection manager that are supposed to "allow simultaneous connections", which are set correctly.That is what is not working correctly. If I connect my cable to my LAN, the TMobile connection manager says it is still connected; but, it will not allow any throughput.Throughput is immediately restored as soon as the LAN cable is disconnected.

TMobile says this problem is due to a setting in my computer that is overriding the TMobile connection.

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Jan 8, 2009

The setup:

Time Warner Cable Internet Dynamic IP
DIR-655 A3 Firmware 1.21
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Aug 8, 2011

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Apr 11, 2011

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Feb 25, 2013

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Desktop: Using ethernet...custom built PC (previous pc was a HP...same issue)
Ultrabook: HP Envy 4-1115dx (previous laptop was a compaq...same issue)
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interface Ethernet0/0
nameif outside


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