Cisco Wireless :: AP541N Device Stops Accepting Client Connections
Feb 8, 2010
We have an AP541N that has been deployed to replace a Cisco 1200 AP (B/G radio). The 1200 functioned perfectly in our environment. The new AP541N on the other hand seems to work fine right after a reboot but immediately starts to degrade service. Over a short period of time, the devices bandwidth degrades to the point were the wireless network is not usable. This happens with just one device connected. Eventually, the device stops accepting client connections. We are unable to get any relevant logging out of the device to diagnose the problem.
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Nov 21, 2012
A client has an ASA 5505 with a base license. The version information and configuration is attached. In 8 hours, sometimes less and infrequently more, it becomes inaccessible. All connections are dropped and the only way to access the device is through a console connection. The WAN interface (VLAN 3) is connected to Verizon FIOS. The interface was set to 100 MBps and full duplex, but I just changed it to auto on both the speed and duplex to see what would happen. The LAN interface (VLAN 1) is also set to 100 MBps and full duplex It has not been changed.
The last time it happened logging was running, but nothing in the log indicated a problem. In fact, the last log entry was a couple of hours before the lockup (there's little or no traffic on the ASA while the problem is being diagnosed).
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Sep 25, 2011
I have two WAP4410N. One of he accesspoints is connected to our wired LAN, called by now AP1. The other accesspoint is connected to the first accesspoint by WDS (Client mode) called now by AP2. I have upgraded both accesspoints to firmware 2.0.4.2. Both accesspoints are set to the same SSID and channel (6) and are set to mixed mode (B/G/N). After I two weeks they started to fail. When I connect to AP1 I don't reveive an IP-address of our DHCP server from our LAN. I'm able to connect to AP1 from our LAN. When I SSH to the box and I do an dmesg command, I see the following messages:
ath_bstuck_tasklet: stuck beacon; resetting (bmiss count 36)
ath_bstuck_tasklet: stuck beacon; resetting (bmiss count 36)
ath_bstuck_tasklet: stuck beacon; resetting (bmiss count 36)
[Code].....
I'm still testing these devices and I hope I can use these devices in our production environment,which is not possible with these errors and outages.
I can't connect to AP2 right now. I think the whole wireless interface isn't working anymore, unless I power off/power on the box. But it's hard testing when it works ok for two weeks and then stops.
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Nov 4, 2012
Firmware Version: 2.00.01 build 15 Sep. 13, 2010
Firmware Verification: dcf86b5724049cb145f571a4bc21a17d.
I was able to connect using Gnome Epiphay Web Browser v 3.4.1 and found no problems on the WRT610N router.So-o-o Cisco, what do you recommend I do, seeing as how there is no later firmware to apply and nothing to configure that I can see.
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Mar 6, 2013
I have 2 AP541N's set up using a WDS bridge, broadcasting a single SSID. I am using WPA-PSK for the bridge and WPA/ WPA2 and CCMP (AES) on the SSID. I only have around 75 (Mac, PC, iPad, iPhone and Android) devices that use wireless. Some are laptops that roam around from AP to AP, and are using LAN when they are not roaming. I have increased the roaming agressiveness on PC clients and this doesn't seem to have resolved the weak connection. At most, I have 50 clients trying to access the wireless at one time. My problem is that they keep on dropping the connections and have real problems reconnecting once it's dropped. After 4 or 5 tries, they may or not be able to reconnect.
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Oct 20, 2011
It's a linksys wireless router attached to their service provider modem and it can no longer recieve new connections. The pc's connected to it before still run through ti fine but any new laptops using the proper authentication and password are unable to make a connection.First thing I am going to try is a factory reset(they mentioned resetting the router but they may have just rebooted it)
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Jun 7, 2012
My ASA 5510 has stopped accepting connections today. I cannot connect with ASDM either. ASDM hangs at "Contacting the device. Please wait" and does not return an error or time out. I can telnet into the device but my CLI knowledge is elementary at best. I'm trying to determine how to view or enable the correct logging and view via CLI. I have looked at the client log from one of the users that cannot get in and have attached it. It looks like Phase 1 is not completing but I'm not sure how to view what the ASA is logging. I have run debug cry isa and debug cry ipsec but it just returns to the prompt and I'm not sure what I should expect to see or what command to run to view the results.
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Apr 26, 2012
We have with AP541N-E-K9 on the latest firmware.
Our AP541N-E-K9 keeps dropping all WLAN connections and will not allow us to connect via WIFI. I have to switch the unit off and on but even so sometimes it will take 10 mins for the WLAN to accept new connections. Nothing has changed on the network for months as it is a very basic scenario ie Draytek DSL Router -> Cat5e cable -> AP541N-E-K9, thats it! The AP is really only used for guest access and may have about 15 staff connected via WIFI at any one time.
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Dec 14, 2012
I have a 2801 with a very simple config that's accepting telnet connections on port 6050 from everywhere:
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May 7, 2013
Is it possible to see device information for equipmnet that is logged into the AP541N access point? I was able to determine a specific IP address was eating a significant amount of bandwidth and was hoping to get the device information (name, type, etc) in the hopes of tracking down who it was.
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Apr 24, 2011
I currently have two 541N access-points slightly overlapping eaching other and my clients appear to connect to the further AP most often. They are setup in a cluster, but that appears to just provide configuration synchronization. Short of purchasing a wireless controller which would appear to be overkill, is there any way to manage client connections between the two AP's?
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Aug 30, 2012
Antennas were set aside prior to device installation, and now can't be found. Can they be ordered as a replacement kit?
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Sep 20, 2011
Installed 4 AP541N units in a client site and they've now come back with reports of issues with the setup. I went out there today to take a look and the issue is primarily that randomly during the day, clients will loose access to DHCP. The client authenticates fine (we see success logs in the Windows 2008 RADIUS event logs) but doesn't manage to get an ip address.To sum up the things with the current setup:
- Running version 2.0 Code on the AP541N's.
- Using Windows 2008 for NPS (RADIUS) and DHCP.
- Cisco Catalyst Switching in the back end.
Things tend to work fine in the morning. It's as the site hits midday that we start seeing issues.In looking at the issue I've come across a number of posts in regards to issues with DHCP and these units. One item that was suggested to switch off Mutlicast / Broadcast limiting on the Advanced Settings. What's weird with this is that if I do disable this option, RADIUS authentication stops working entirely. Switch limiting back on and RADIUS works again. I've confirmed this with Network Monitor running on the RADIUS Server.
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Jul 20, 2011
I am supporting a small cluster of AP541N WAPs and would like to know if there is an easy way to manually disconnect an associated client (recognized by MAC address) from the Associated Clients screen in the Access Point Configuration Utility Status view. That type of feature might come in handy with unruly bandwidth hogs down the road.
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Nov 3, 2012
this issue with my WRT54G2:
- when i open more than 2 or 3 browser windows or anything that access internet, it stop routing
- shutdown and power up make it work again (then stops again after some simultaneous tcp connections)
- hard reset dont work
- WRT54G2 V1 Firmware Version: 1.0.04
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Mar 23, 2011
I have a very strange problem on 2 (independent) Cisco 861 routers in different places.They are both configured as easyVPN servers. One uses UDP, the other TCP. VPN clients connect by using Cisco VPN client software. This cannot be changed because the customer expects it this way. Both routers have the same problem:
* the first VPN connection after a reset works fine. Traffic passes through and it is perfectly usable. I can ping the internal network interface on the router side from the client without problems.
* the second connection (and all subsequent ones from different client machines etc.) connects fine, no errors on the client whatsoever (not sure I evaluated all possible debug output on the "server" side). However, no traffic passes through. Pings do not come back from the 861 anymore through the VPN tunnel.I already enabled ICMP debugging and saw that pings are actually answered by the 861, but do not reach the client.The same seems to happen to any and all other packets as well.
* If I restart the 861 the very same thing happens: first VPN connection works fine. You disconnect, try another connection from the very same client computer, and it does not work anymore until the next router reset.I append the configuration for sake of completeness. confidential parts are represented by XXX. Some ACLs are not in use right now; I used them for testing. [code]
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Feb 26, 2011
I have recently been experiencing a problem. This started to occur after I had gotten new internet service and a new router. I now have comcast, and a new NetGear router. I also have a VOIP phone connected to the router call "AllVoi". Now, whenever I use this phone, all connections on WiFi go down as I am using it. While, when I am using any ethernet connections dirctly from the router, it works fine. It becomes a large problem when you are watching a video or something from a laptop WiFi connection.
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Feb 7, 2013
A short while ago, I had my data backed up onto a new HDD, as the old one was showing signs of failing soon. When I got the computer back, I noticed a problem where I need to constantly hit "Diagnose" in the Wireless Network Connection Status to get my internet working again. When it gets into this stage, several websites continue to work, I don't lose my connection to them. Some websites I can still connect to without a problem. However, many websites, even google, keep giving an error that the host could not be found. It appears that it stops accepting new connections until I reset the wireless card. My Laptop (using wireless) and other PC (Connected directly) have had no issues at all with our wireless router.
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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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Sep 29, 2012
I have been using a TP-Link WR1043-ND for a while now. It is configured as a dumb switch with DHCP disabled. Every other day or so, the device stops taking connections and I cannot access via the IP address. A simple power toggle resets everything immediately. Through this, the LAN connected devices never lose connectivity, I simply am not able to connect wirelessly or access the router via web browser.The only device I connect to the wifi is my phone, so it may actually be more frequently and I do not notice due to my low utilization (and I have 3G so I don't always notice right away if I'm connected). I have a WDTV Live SMP connected to one of the LAN ports and that functions non-stop regardless of the wifi. When the wifi is "down", my phone can see the network and attempts to connect. Sometimes it times out, other times I am repeatedly prompted that the password is incorrect, even though I am POSITIVE that I am entering it correctly. Once I toggle power on the router, the phone connects fine with the stored password.
I have updated to the latest firmware (about a month or so ago): Version: 3.13.12 Build 120405 Rel.33996n My hardware version is: WR1043ND v1 00000000 The router is connected (via LAN port 1) to a wall drop. My upstairs roomate maintains the gig switch and modem, as well as handling the network admin. I simply am using the router as a switch to provide extra ports and broadcast the network over wifi in my apartment.All that said: I need troubleshooting this router and it's configuration before I consider buying a more expensive replacement (and if I go this route, I might add a small switch as well to give me more than 4 LAN ports to work with). I am also considering flashing to DD-WRT before replacing as well to see if that makes a difference in reliability and uptime.
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Jun 26, 2011
I'm trying to configure my Linksys E2000 to be an ethernet attached wireless device to use on computers instead of dongles, etc. I don't want it to route, just act like a Wireless card.
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May 23, 2011
Dropped VPN connections.I experienced a similar issue a few years ago with my LinkSys WRT54G router with dropped connections to my corporate network using the Cisco VPN Client. To make a long story short the problem was the result of the following:
1. The default ""Client Lease Time" on LinkSys routers is 0 which means 1 day or 24 hours.
2. By DHCP Protocol definition, DHCP clients must renew the DHCP client IP address lease at the 1/2 life cycle of the lease (12 hours if using the router's default setting). This is deadly for VPN clients as the short period of time when the client IP address is no longer valid, the VPN client considers this a loss of network connection. The LinkSys E-series routers further aggravate the situation by randomly assigning new IP addresses to DHCP clients instead of reassigning the client's previous IP address and tends to favor higher host IP addresses in the defined range.
Suggestions to prevent lost VPN client connections:
1. Change the "Client Lease Time" on the router to 8640 minutes (6 days 00:00:00).
2. Prior to establishing a VPN client connection, use the Windows Command Prompt to issue the "ipconfig /renew"
command to obtain a new IP address from the router that will be good for 3 days (72 hours).
3. Configure your E-series router to use the <DHCP Reservation> option to pre-assign IP addresses to your systems making sure they are outside the range of the dynamically assigned DHCP addresses. Using default settings,these would be in the range of 192.168.1.2 thru 192.168.1.99 as the router starts at 192.168.1.100 thru 192.168.1.149.
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Jul 13, 2012
Can't find client device for E2000
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Nov 24, 2008
I just purchased a WAG54G2, setup was simple and easy. After being on for about 16 hours if I login to the device all the settings appear to have been reset to default, although the access point and wireless are still working. After another few hours the internet access stops and device appears to have been reset. No power spikes or reliability problems with power. Contacted Linksys support on three different occasions and they don't have any suggestions that work. Tried a "hard reset" but problem still occurs. No firmware upgrades are available for this device.
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Jan 10, 2011
I upgraded to firmware version 1.0.03 I started to have this weird issue: I have four PCs connected to this wireless router via wireless G. They all run Windows 7 Home Premium. After a few hours I started to notice that the DHCP client table is empty even if all four PCs are connected to the internet. This causes a networking problem because one of the PC serves as a file server and it grants access by IP addresses. Not being able to "see" those computers, my access is denied.
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Nov 29, 2012
I have 2 internet connections, one as primary and one as backup Internet connectionIs there any device which I can use to auto switch to backup in case of any problem in the primary internet connection ?
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Feb 20, 2013
I have a asa 5510 vpn client groups configured and connected to the internal network DHCP server stops giving network service dhcp and the network goes down.
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Apr 20, 2011
I just recently got the internet and I have a desktop computer that has ever rarely been used and it has never had the internet on it. I called tech support of my ISP to see what many be the problem why I can't connect to the internet and found that the source of the problem was I do not have a LAN network connection. When I open Network Connections on the computer, nothing is there. I also went to device manager and there is nothing there for Networking. Under category of "Other Devices" in Device Manager there is a question mark next to "Ethernet Controller". Are there drivers or something I need download to fix this so I can connect to the internet via a DSL connection.
My computer specs are:
Windows XP Professional
Version 2002
Service Pack 2
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Jul 27, 2011
I have just deployed a 881 router at a clients site & configured it to allow remote IPSec VPN connections using the Cisco VPN Client software.
The router works fine except for the remote VPN connections.
Client VPN connections are not being allowed and I am sure the problem is the zone based firewall. I have had very little experience with this, most of my experience is with ACL based security.
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Mar 22, 2011
I am using Cisco VPN client for windows 4.0.5 (C)I use the VPN client to connect to my office from home and to connect to a customer via their VPN connection.Is there any way that I can have these two VPN clients active at the same time instead of needing to diconnect one to connect the other ?
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Mar 30, 2011
I have some remote locations that connect to my ASA 5510 cluster (Aktive/Passive) using the Cisco VPN Client, from which the connection gets disconnected at random intervals (could be 5 minutes, but sometimes after 15 minutes). However, some other remote locations do not have this problem. All locations have the same VPN client configuration (distrubited by pcf file).
I already disabled isakmp keepalive on the ASA but this did not work. If I read it correctly, the Cisco vpn client logging shows that the ASA initiates the ending of the connection.
Code...
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Feb 4, 2011
My Ethernet is not showing up in device manager or Network Connections. I've checked the bios and it is enabled. I've also tried to install the drivers, but at the end of the install this error message pops up " the Realtek Network Controller was not found. If Deep sleep mode is enabled please plug the cable"
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Jan 20, 2011
I put Win7 on a customed pc bought online. The motherboard has an Atheros L1 integrated NIC and I installed a Dlink dge530t NIC into a PCI slot. I know I have to disable the onboard nic but the installed card is not comming up either in Device manager or network connections. What gives? In the bios under integrated peripherals i did enable PnP OS.
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