Cisco Wireless :: AP541N Poor Performance Of Network Connection
Dec 5, 2011
We have two Cisco AP541N running our wireless network in the office. They're configured with the same SSID, so that people are automatically switched between the two access points depending on their location in the office.
Frequently we are experiencing very poor performance of our wireless connections and it seems to be related to when 4-5 clients are connected to one access point. After restarting it (which also moves the 5 clients to the other access point), the performance problem goes away for a while.
I've upgraded one to firmware version AP541N-K9-2.0(1) (the other is running AP541N-K9-1.8(0)), but it doesn't seem to work.
I run my virgin broadband through an old NTL modem and a Belkin router. I haveit all attached to a computer in my study along with a new 6TB Buffalo Nas drive. The computer has GIGABIT LAN. I use Belkin powerline units to relay the network around the house. In my lounge i have a blu ray player, AV amp and my sky box attached to the network via the Belkin powerline units and all run ok. This week i have added a Cambridge audio streamer but i am suffering now from a lot of dropouts and network failures escpecially when trying to stream music from my NAS. all seem to be set up correctly as per the manuals. I have spent a lot on this unit specificallly to stream my music so this is really important to get working correctly The powerline units can flash blue (fast ) or orange (slower) but i only see the orange light .My local dealer says i need to upgrade my Modem/Router and has suggested an ASUS RT-N66U which I understand is a modern 2.5/5ghz model . he says my system is overloaded
A few questions.
Is this a suitable modem for me to use on my Virgin cable broadband? (apparently there are two alternatives types of modem/router) Is there a better alternative unit ? Could there be another cause for my problems and if so how do i diagnose them ?
i have a 541N running the latest firmware 2.0.2.It has 3 SSIDs for the 3 vlans that it has.I have configured b/g/n.The power is fullIt is powered via POE.The end customer tells me that the range it covers is very very small!Comparing to traditional low budget APs the power is very very low.It does not cover 30-40m in free space where other APs do.Do i need to configure something more in the radio settings?
I am using 2 WAP4410N in bridge mode with WPA2 Security.The bridge seems to be stable but i get poor transfer rates.Distance between devices ~ 8m - nothing between.Wireless networkmode: N-Only, Channel: Auto, Channel Bandwitdh: 40MHz (also tried auto and 20MHz)Firmware 2.0.2.1 because got different problems with 2.0.3.3One side is connected to my LAN other is connected to a notebook.
I recently purchased an EA4500. It started out working really well, but recently I noticed that my speed on my iPhone and iPad has dropped significantly. When I'm in my office where the router is set up, I'm getting around 15 to 20 mb download speed and 5+ upload speed. When I go to my living room about 40 feet away my speed drops to 1mb down and less than 1 up. I expect to see a drop in my performance the further away I get from the router, but this seems really unacceptable to me.
The wireless connection barely registers in the Speed Test within Cisco Connect - .56 download, 5.35 upload. A cable connection gives 2.4 download and 5.5 upload. The E900 is not far from the computer with no obstacles between.Is the wireless portion of the E900 set up improperly? Is there anything I can do to improve the wireless performance?
I have EA4500 acting as a router on domainless all-Windows network of two XP machines.Unfortunately, EA4500 aggressively grabs the role of the Master Browser (I am talking about Computer Browser Service) on the network (regardless in which order you power the devices up) and then doesn't serve as a working Master Browser - both Windows machines stop listing the network computers in the "Network Neighborhood" and incur massive timeouts when attempting to view the listing.A quick look with 'browstat.exe status' reveals that indeed the router has announced itself as a Master Browser device, but returns errors when you query it.Quite predictably, without the router, both machinces figure out amongst each other who will be the Master Browser and everything works fine. The problems begin only when you add the router to the network.
1) Is there any way to make EA4500 work like a full-blown Master Browser (the one that not only announces itself, but also serves as such)? having a Master Browser integrated in "always-on" router would really improve the predictability of the network.
2) If not, is there any way to disable the Master Browser on EA4500? For now I managed to achieve that by assigning the router to different workgroup name, but this is lame, as I now can't connect a disk storage to the router and use it within the same workgroup.
I am backing up massive amounts of data to the cloud. Everytime I do this, the wireless performance on my EA4500 seems to degrade to half its throughput. I am using the 2.4 GHz band.
having a very strange problem with a Cisco 1861 running - Cisco IOS Software, C1861 Software (C1861-ADVENTERPRISEK9-M), Version 12.4(24)T5
The issue -I have suddenly started to get performance issues with downloads and access through the ZBF. Without the firewall enabled and just having NAT enabled and routing , downloads perform as expected - ( have been using Itunes download as test file ) - with the ZBF enabled , and the necessary rules installed to inspect & allow traffic - downloads stall - and the only way to get the downlaod to start again is to pause , then resume. The stalls are anything between the first 25 - 120 secs.
I have debugged and performed packet traces - but cant see anything untoward. I have also placed another router ( just a cheap Belkin ) on the ADSL service and again , the downloads work as expected.
one further thing to add is that when im tunneling through the firewall ( VPN ) , then downloads do work as expected - suggesting that the issue is with native HTTP(s) traffic.
I have upgraded from T4 to T5 - and the symptons still remain - I am thinking that these may have been introduced when i upgraded to T4 a few monthes ago.
I replaced a Dir-655 at a coffee shop, with a new dir-655 a few weeks ago. They keep calling and saying that Windows clients are not working and that Mac clients do.My first thought is that they are overloading the router but I would think that all computers would have problems not just the Windows computers. could the router be so bogged down that it takes to long for DHCP request for windows computers assigning the IP twice?
We use MS RRAS services behind a Cisco ASA 5520. In testing the performance I have found that we can only get a little over 2MB of througput when connected to the VPN server over a broadband connection. I have verified that the issue is not the RRAS server itself as I can connect to VPN from the LAN and the througput tests at 300-400MB. I also connected to the LAN directly on the outside of the firewall and only get 4 or 5 MB from there which does not seem right. None of the switches are showing any errors. I believe that I have the passthrough stuff setup as I should. I even went through these steps as recommended by Cisco.
hostname(config)# class-map pptp-port hostname(config-cmap)# match port tcp eq 1723 hostname(config-cmap)# exit hostname(config)# policy-map pptp_policy hostname(config-pmap)# class pptp-port hostname(config-pmap-c)# inspect pptp hostname(config-pmap-c)# exit hostname(config)# service-policy pptp_policy interface outside
I have a Catalyst 4006 with Supervisor II engine. I have 48 port 10/100/1000 blades installed in it for connection to my servers. I am having a lot of problems with performance when connecting servers that are using 100 MB NICs. The speed of the connection is really bad. I have attempted setting the ports and NICs to 100MB Full duplex instead of auto-detect, but still get the same results.
I also have a 10/100 quad-port card installed in a NetApp filer. All four ports are trunked together and connect to 4 ports in the Catalyst. The ports in the Catalyst are trunked using the Port Channel feature of the CatOS. When I look at the port statistics on 3 of the 4 ports from the quad-card, there are a ton of runts and errors (both transmit and receive). The 4th port is fine, no errors.
I have 2 RV042 routers with identical firmware (1.3.13.02-tm) and settings. One router is a backup that sits in a box, but both experience this problem. The WAN port gives very poor performance most of the time. Download speeds range from normal, 25mb, to less than .5mb. Pings from my command prompt or the routers "Diagnostic" page, even to the cable modem, are almost always above 500ms. However, pings to internal resources are fast, usually under 5ms. If I connect my laptop directly to the cable modem I have no speed issues. The problem occurs whether I use WAN1 or WAN2.
If I restart the router, speeds are fine for a few seconds and then it begins to slow down like someone is turning down a dial. We also regularly experience a complete internet disconnect quite often, and when it happens, the ping results are the same when it comes back up, almost like the router is restarting itself. [code]
A few days ago I received my DIR-655 I ordered off Amazon and hooked it up. There were no problems the first day after initial setup. The next day I noticed that I was losing internet connection even though the wifi indicator on my laptop said otherwise. This happens for about 5 minutes at a time and on other devices such as my desktop and my iPad. And I hopped on Call of Duty last night and played a competition with some friends and gave everyone 4bar connection. Later that night, I was playing some more and people that connected to me received 1bar connection and I got that in return on their connection. I feel that the router isn't working with my devices right?
We have recently purchased some Cisco 3750x switches and we are getting complaints from users that the performance is poor when both the PC's NIC and switch port are fixed at 100/Full?
There are no errors or collisions on the switch interfaces so there is no obvious problem on the switch. The PC's are standard DELL Optiplex 755/760's or gx 520's.
Any performance issues when configuring the switchport to 100/FULL?
We have a remote site connected to ADSL line with a Cisco 887VA router attached. This has been working fine for the last couple of months. However, recently, the site have started to complain of performance issues (network slow, applications disconnecting, etc)Looking on the router, we can see evidence of packet loss/timeouts from a simple ping to the internet e.g. [code]
However, we have logged the fault with our service provider and they return all line tests as clear but what is particularly strange is that they also report “and the SNR Margins are well within threshold levels (Upstream 11.5 and Downstream 15.0)” which, unless I’m misunderstanding something, seems to be completely different from what the router itself is reporting.Is there a reason why the service provider’s stats for Noise Margin would appear to be so different from what the router is reporting?
Im getting really poor performance on my 1841, my intial thoughts was a duplex mismatch however although im getting a few CRC errors (root cause unknown at this point) not enough to suggest that the this is the issue.
Heres the config:
Building configuration.Current configuration : 5274 bytesLast configuration change at 20:31:01 PCTime Sun Dec 18 2011 by admin_xversion 15.1no service padservice tcp-keepalives-inservice tcp-keepalives-outservice timestamps debug datetime msec localtime show-timezoneservice timestamps log datetime msec localtime show-timezoneservice password-encryptionservice sequence-numbers!hostname xxxxxx!boot-start-markerboot-end-marker!!security authentication failure rate 10 log
We have several of the SG300 Serices switches. We use them to route VLAN traffic to Remote Offices, Internet Connections, and WiFi Access Points.In one remote office we have a SG300-10 setup to route the HQ Network and the remote Office Subnet. The SG300 is Connected to HQ via Fiber and has multiple Tagged VLANs on it. If I do speed tests over the Fiber Link on the Incoming Tagged Netwotk I get Decent performance, 80Mbs. If I switch to a networtk that is not priginating from HQ, and have the SG300-10 route packet, I get dismal performance. 15-20Mbs.
I Fireded up a New SG300-28P FW v1.2.7.76. Added a the HQ VLAN 101 and new VLAN 1025 . Mapped some Tagged and untagged ports for each. Switch was connected to HQ Network as untagged VLAN 101. I put a laptop on an Untagged VLAN 101 port. Ran some tests, cam back with 750-850Mbs. Great. Put the same laptop on a Tagged 101 Port, Configured the NIC for Tagged VLAN 101, Same test, same Speeds, 750-850Mbs.I then Configured laptop for Tagged VLAN 1025. Connected to tagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!
I then Configured laptop for Untagged VLAN 1025. Connected to unagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!It was only the Laptop and the Connection to the HQ net on the SG300-28P. Why is the performance of this unit soooooo poor when it needs to route?Other Switches have FW v1.0.0.27 or FW v1.1.2.0. They have Similar speed issues. All Configured for Layer 3.
I am having poor performance through an IPSec VPN between two Cisco ASA 5505s. In researching, I found some discussion about setting the MTU for the VPN. So from one side of the VPN tunnel, I tried pinging a host on the other side specifying the Don't Fragment flag and testing different packet sizes. I found that a size of 1398 is the largest packet size that results in a successful ping.So, I also understand that I should be able to set the MTU to 1426 (1398 + 28 bytes for the IP and ICMP headers). What I'm not 100% clear on is where all I need to set this. Do I set the MTU for the outside interface of the ASA that the VPN tunnel is going through, or do I also need to set the MTU for the inside interface, or on the outside interface and the switch port that the interface is connected to (switch port is set to an MTU of 1500 as well)?My thoughts are that only the outside interface of each ASA needs the lower MTU (currently set at the default of 1500).
I have 2 routers the first is plugged into the telephone line and has a power-line adapter plugged into it the second router which is downstairs is just to extend the range,unfortunately I have a very poor connection (wireless) and internet often drops out. I want to reset the power-line adapter but but will this mean that the connection will be lost from the second router and it is just my computer that is wrong? My trouble is that I don't think the power-line adapter is working but it might be or... its just that the they both connect between each other wirelessly? Or do they both connect to each other wirelessly? both connections from each router are pretty poor. I have updated my wireless card as well. I am not resetting the power line adapter until I know the internet is going to be fine afterwards as my Dad needs it for his work
I have a client with an AP541n, most recent firmware installed. When he logs into the management interface (via IP using Google Chrome browser), it will work for a few minutes and then just disappear. If he attempts to reload the page he gets a message similar to a website being down (page cannot be displayed). The idle timeout has been extended to 4 hours, but this can happen at any point while logged into the interface.
I have purchased a Dell Inspiron 15 R 5520. the wire less net work for this laptop is very limited. i am loosing connection aftre, i am moving 4 meter away from the source.
i have other dell laptop at home, but thats works well.
How do we begin troubleshooting a wireless device accessing the network that a user is complaining slow accessing network recources? We are getting complaints that it is slow, when connected to internet we get about 20 MB. There is only one user connected.
We switched to 2.4 GHz 802.11n from 802.11 bgn, but are told that did not work. We also have it on its own VLAN.
Product Identifier:AP541N-A-K9 Hardware Version:V01 Software Version:AP541N-K9-2.0(0) Device Description:802.11n Dual Band Access Point - Single Radio
Our wireless environment consitst of 5 AP541N's configured with 2 VAP's. 1 VAP is for our private network and the second for unsecured guest access. I am wondering what the preferred wireless mode is to maximize network speed? We only have N devices on our network and our mode is currently set to 802.11 b/g/n. Would 2.4GHz 802.11n be faster?
Does the Transmit Power setting have any effect on speed? Or just range? Any other settings on the Advanced Settings page effect network speed.
Our wireless clients that connect through our AP541N cannot see other computers on the network. They can ping other computers by IP and host name and access the internet OK. Mapped network drives can be connected initially but are very unreliable and always end up disconnecting. Restarting the computer does not work. When these computers are wired they see the network as expected. why my wireless network would behave differently then the wired? The wired and wireless networks are on the same VLAN. The wireless clients are all Windows 7 systems.
I have been having considerably slow internet compared to the other guys I live with and decided to investigate. I have run the speedtest.net on a good chunk of their computer and they all get around 40 mb/s while I am getting 2 mb/s. I have figured out that when I go in and change my MAC Address, I am able to get the same speed that they do for a short amount of time, but after a while(I haven't figured out a time interval) my speeds go back to the 2 mb/s. I can then go back in and change the address again and the same thing happens. I thought I might have a virus, but the different scan that I have tried running show nothing and when I do netstat from the command prompt, nothing abnormal shows up.
I had an old Belkin wireless USB adapter that I used with it for the first few days, but I got tired of the slow speeds that I had always known to be associated with that card. So today I went and bought a CISCO PLEK400 powerline networking adapater. Brought it home, plugged it in to my router in my living room, plugged it into my PC in my bedroom, gave it a quick little test drive. First I went to speakeasy to test the up/down speed. Never more than 1.5Mbps down/1Mbps up. My laptop, running wirelessly through the same router, generally hits 20Mbps down and ~2Mbps up. So I plugged the ethernet cable into my laptop, to see if maybe it was the network card in my desktop that was faulty. Speakeasy speed test showed 1.5down/1up wired for laptop as well. Pinging google through command prompt, on either laptop OR desktop while wired, nets a ~300ms response time.
I recently bought a dlink 825 and it seems right out of the box the wired internet connection seems very poor. Wireless works fine but it on wired the router refuses to download any files larger than 300kb. Images won't load, files won't downloads, etc. I've swapped cables, tried two different computers, hard reset, loaded the 3.01 firmware and nothing seems to work. I went back to my old router and it works fine. I am able to transfer from computer to computer okay with the 825,The cable modem is a SA dpc2100.
I have a D-Link DWA 510 and it's been perfectly fine, no hassles. Until about a week ago. Since then, not a lot has changed in my computer except for a new PSU/CPU and Keyboard and Mouse. Nothing has changed about the router, it's just the card that's messing up.
What I've tried: Reinstalling the drivers Updating Rolling Back Changing PCI card position
I'm up for trying many things. I just want some reliability until Saturday/Sunday when I buy my new card.
I'm having some connection problems with my new laptop (Dell XPS 14z).When I'm close to my router (D-Link DIR 635), the connection works just fine.When I'm a bit further from my router, I get a poor connection and a slow speed. I've tested 2 other laptops at the same spot, both of which have no problem with the connection.
