Cisco Wireless :: 2504 - Facing Latency For Wireless Users?
Oct 28, 2012
We have Wireless Setup and facing the latency issue for Wireless users , Wireless Controller is 2504 and AP are of 3600 Series .Even we stand below the AP , latency is in range of 19 to 20 ms , while client has Autonomous setup , so when he shifts the connectivity to Autonomous Setup he get latency is range 2 to 8 ms which is good then WLC setup...
While Testing We made the Single AP on which is integrated with WLC and check the Latency , but in these senario also it range from 19 to 20 ms ... ( Also sametime all Autonomous AP's were Off )
I am attaching the show techsupport to resolve the issue and tell me what fine tunning can be done to resolve the latency issue.
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May 21, 2013
-WLC 2504
-AP1602
-SW 7.4.100.0
We have 22 x AP1602.5 of them show up in the WLC with Controller Association Latency of around 1 minute and 10 seconds.The other 17 all have latency around 10 seconds.
1. What are possibile causes for high value of association latency?
2. Could high-value association latency be an indication of badly working wifi for data traffic?
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May 23, 2012
We are facing a bug with our ASA 5500 series (version 8.5.26) and the Internet explorer when the users connect to ssl vpn and they are not able to connect to the network resources like their PCs and the Cisco port forwarder keep asking for its installation
We already updated the ASA version installed in the user's computers the Microsoft kill bit patch.
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May 14, 2013
I have a 2504 Controller (os version 7.0)with 7 access poins attached and with 2 vlans. one for regular users and another for gues users.
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May 7, 2013
I have a cisco wlc 2504 is deploying authentication services to guest users toward a portal web customized and configured. I need to install my certificate verisign (certificate.cer) in to cisco wlc because my users don't like the page no trusted (The wlc is showing me ''There is a problem with this website's security certificate'') when they are trying to access to ssid to users guests.
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Sep 19, 2012
My customer has multiple sites, each with a 2504 WLC.A data center with a 5508 in the DMZ acting as Anchor for the remote sites.ACS 5.x and NCS Prime.All guest users will egress to the internet via a Vlan in the DMZ.Authentication is currently web-auth on the Anchor, but will move to NCS once that is fully deployed.
Is it possible to put a printer in each site for Guest WLAN users to use?
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May 29, 2012
Is it possible to assign IP addresses to remote site WIFI users from local DHCP server and forward all other traffic to 2504 WLC?
[WIFI Users] >--------<AP (DHCP server) >------ VPN ---------< WLC
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Mar 5, 2013
I have Cisco C881W-A-K9 wireless ruter that i want to configure with one SSID hiwever i am not able to achieve this . [code]
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Mar 10, 2013
When I tried with Security disabled, I could FTP and see my drive from an external network. However, once I rite & Security is enabled with write and read "" granted with a user profile created, the FTP Client has some error message; Could it be due to mode in FTP settings? (passive is set)
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Jan 28, 2013
Region : UnitedKingdom
Model : TD-W8968
Hardware Version : V1
Firmware Version : 120926
ISP :
Is it possible to turn off the web server facing the internet. When accessing my external ip address I am presented with the logon banner requesting user name and password together with the TP-Link name and model numbers. I would much prefer if I could switch this access and banner off.
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Sep 7, 2011
my latency values are extremely high, sometimes millions(!) of microseconds. THe problem is always solved by disconnecting the 11b/g wireless LAN adapter, or the Intel(R) Gigabit Network connection. However, I can't work without internet.
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Sep 30, 2012
I work for a small college. We have several Cisco 1200 Aironet deployed our the campus, all of which are configures to run multiple SSID's. The problem I have is that when I connect, via AP, it successfully connects to the desired SSID but on pinging the default gateway of said SSID I get high latency (avg around 100 - 200ms).When pinging from the switch (Cisco 2950) to the default gateway the latency is good (1-2ms). It is just high when I connect via the C1200 AP and try to ping.
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Jan 21, 2012
I've just purchased WRVS4400N VPN router and installed it. This was a replacement of a old Linksys router. After installing the router, I've started seeing wireless drops, packet drops and latency on pings. I've installed the latest firmware, disabled Firewall services, disabled IPS. No changes at all. As a basic example, I am pinging my NAS device (hard wired to router) from a laptop connected to wireless below. Previously while connected to my old linksys router the time was equal to no more than 2ms.
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Apr 17, 2012
When using this laptop (Toshiba Satellite C660D-1GD) on the forum it seemed unusually laggy when changing pages, whereas when using my Toshiba Satellite L450D it is always more positive.Decided to do some ping tests via the cmd prompt (after checking the error count via telnet) and they were in the hundreds.The L450D ping tests are spot on so I know it isn't the router (Billion Bipac 7800N)Been the usual route, totally uninstalled the wireless adaptor (Realtek RTL8188CE Wireless LAN 802.11n) including the Cisco elements, Eset and MBAM full scan and downloaded chipset drivers. Even factory reset the router and deleted the wireless profile including reg entries as a last resort.After each of those operations (other than reinstalling the wireless adaptor) the latency would be spot on and continued to be after an immediate reboot, but logging on a couple of hours later or the following morning, they would be very high again.After reinstalling the wireless adaptor for the second time, on a hunch I removed the Ethernet cable and run another test. The latency came in high but when I re-ran the test wired, they were spot on.
Phoned up KnowHow techs and read off the numbers who then put me onto 2nd level tech. He remotely connected and ran a couple of ping -n 50 tests as well as a tracert but was unable to replicate the results I was gettiing. As nothing was broken (for him), nothing to fix but to phone again if it continued.I rebooted after the phone call and got the high latency straight off. I wondered, as the latency returned to normal after certain operations I'd done, whether the remote connection had the same effect.Having been on the phone for 55mins, I'd had enough.These are two tests I've recorded from today which are together in one Wordpad doc, so you'll be able to see what I mean. Ctrl+C has been a bit erratic so they are the only ones I've been able to save. [code]
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Feb 21, 2012
I have two 1410 bridges installed in a point to point link using external directional antennas. The distance between the bridges is only 200M. As you can see below from the output the RSSI and SNR are excellent with a good fade margin available. These stats are almost identical to what my path profile calculated out to be. During normal operation the latency on this link sub 2ms, during certain conditions the latency jumps to 40+ms and starts dropping packets. I say certain conditions because we have not been able to pinpoint it. Unfortunately at this time the customer does not have the ability to do any SNMP polling or collect any statistical information (working on getting this setup). There are an excessive number of data retries and am not sure if that is normal. During the issues I have observered the below command output and the numbers did not change, which leads to me believe that it is not a RF issue. It almost looks like it's serialization delay, but I have no data to back that up. During iperf performance testing of this wireless link I could push 54Mbps of UDP traffic no problem, no errors, no CRC's.
Bridge Parameters
Encryption: WPA-PSK w/TKIP
Distance parameter: Configured to 1
[Code].....
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Aug 31, 2011
I installed the E1000E with L2TP (the ISP forces me), and since then I have disconnections, bad bad response times,
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Mar 18, 2012
I have the same issue with Toshiba satellite AA665D-s6091 I expierience crackling sound when playing. peaks appeared when I had either the (cable and wireless) adaptors enabled, when I enable/disable the backlit keyboard and also when I enable/disable eco-mode.A Windows and driver update fixed the cable adaptor issue.
I ran the commands in post #19:
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global congestionprovider=ctcp
netsh int tcp set global dca=enabled
The wireless adaptor issue was fixed with these, however every time y enable/disable backlit keyboard or eco-mode on my laptop I still get this latency peaks around 18000 us and audio clicks. I check latency with DPC latency checker V1.3.0?
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Mar 10, 2011
Product: Linksys Wireless-G Broadband Router WRT54G
Version: 6
Firmware: Has Been Updated
I am directly connected to my router. Lately, I have been receiving high latency spikes and total loss of internet. The problem must be related to my router, because when I connect to the internet through my modem I don't have this problem.
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Mar 12, 2013
I have a Cisco 2801 with two DSL cards that are both routing to the internet, with NAT to the private LAN interface. I am using IP SLA and route maps to accomplish this load balancing. I have rsolved most of the issues that come with this setup, but I still have a major issue: I cannot SSH into both of the WAN addresses, only one. I have included whqat I think is the most relevant config info.
#sh run
! ........some info omitted........!
!
[Code].....
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Dec 6, 2012
I have on 7200 series router with NPE-G1 module which is facing high CPU utilization. I have not found any particular process causing this high CPU utilization as it is caused due to interrupts. I have already enabled fast switching by "ip cef" command. Please suggest how to normalize the utilization as it is impacting the network and causing slowness. Please find below the output of show process cpu and also find attached the show tech of the device. Also let me know if any other output is required.
[CODE]...
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Sep 9, 2012
Facing issue with ACE module Part#ACE20-MOD-K9 having NP failed error message and module got restarted.
Module software currently# c6ace-t1k9-mz.A2_1_6a.bin
We have studied the Support Community document and got the BUG id's information having impact on this module, BUG id's: CSCsv92321, CSCsx25981, CSCsq38638
Software version to upgrade for the ACE module having no impact on this ACE module by these BUG id's having parity error symptoms.
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Mar 18, 2013
I'm trying to have a standard equipment for our POP deployment. Basically this edge router will connect to our customers and pass data and or voice traffic, capable of BGP and good enough to accomodate up to 4 clients.
We have on hand a 3845 Router, and ME3600X. The 3845 is EOS and replacement is 3945. The ME3600X is a fixed configuration so would you recommend a 3945 or a much higher model like a 7300.
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Sep 18, 2012
We have a 2504 Wireless Controller and it works great!We currently have 6 Access Points (Aironet 1252) connected.We just added the sixth one a few weeks ago and with a properly configured and fully functioning Wireless Controller, it was super easy.Now, I have been assigned to add another Access Point, but at a remote site.The plan is to have up to three or more APs at this remote location and we want them to talk back to the Wireless Controller.We have plenty of licences on our current Wireless Controller.Do do not want to spend the funds for another Wireless Controller and more licenses.
1. How does one manually add a Aironet 1252 to the 2504 Wireless Controller
2. If the AP is on a different subnet than the Wireless Controller, how does one get it registered?
3. The best for last: Can a Aironet 1252 talk to a 2504 Wireless Controller over a WAN link?
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Apr 7, 2013
Is there any way to configure a wired guest network with a combination of 5508 and 2504 wireless controllers? I am aware that the 2504 does not have wired guest functionality, however is it possible to set up a wired guest on the 5508 and using mobility anchors, transmit the l2 information through eoip to communicate with the remote vlan?Home built NAC solution, using 802.1x authentication on switchports for public areas. If user is an employee, communicates with the supplicant on their machine, and places them on an internal vlan.If user is a guest, user fails 802.1x check and is placed on a "guest" vlan with an ACL and external DNS.If placed on the guest vlan, the user has to accept a terms of use form.This is working currently with our 5508s without any issue, however we have some remote offices we'd like to roll this out to that are using 2504 controllers. I'm hoping there's a way that I can use the 5508 as an anchor or vice versa to make this work.
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Nov 14, 2011
We have a 1841 Cisco router for one of our remote sites and we have the GRE over IPSec tunnel on it (with our datacenter router) for the connectivity. The LAN facing interface becomes UP/Down (status 'UP', Protocol 'Down'). When I login the router and 'shut' and then 'no shut' the interface, the interface becomes UP and everything starts to work. Traffic starts to flow across it. But after some time, some hours or sometimes some days, the interface is again back to up/down status. The router is connected to a non-Cisco switch. I do see some CRC's increasing very slowly, but apart from that there seems nothing wrong with the interface in sho int fas0/0 command:
!
RTR01#sho int fas0/0
FastEthernet0/0 is up, line protocol is down
Hardware is Gt96k FE, address is 0026.cb91.ee48 (bia 0026.cb91.ee48)
[Code]....
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Oct 13, 2012
I am new in wireless , i have Cisco wireless controller 2504 for 50 access point, access point 1262 and switch 3560.i setup the controller correctly and i contect it to the switch and connect the AP to the switch.i can ping from the AP to the controller and vis versa.but the controller can not joint the AP.
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Nov 27, 2012
My client would like to have a wireless deployment between several differented offices in the city. There is connectivity between the different sites...but my main issue is, is this option really feasible. I was thinking of a centralized WLC like the 2504 coz of price + 36 APs, 2 at each site. The main worry is the network setup considering the fact that the APs have to communicate with the WLC so unpredictable network issues i believe will have a very huge impact.
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Feb 18, 2013
We are facing issue with highly frequent interface flaps on Cisco 4900M switch only for module WS-X4920-GB-RJ45. Strange thing is no complaint from the users/server teams for any traffic interruption.
Switch: Cisco WS-C4900M
Line card: WS-X4920-GB-RJ45
IOS image is cat4500e-ipbase-mz.122-53.SG4.bin
There are several other smilar model & linecard/inventory of switches with exactly same IOS image, however there are no issues with them.
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Nov 3, 2012
I recently moved from an old apartment in Downtown Montreal, to a suburb area, but still close to where I was before (10 km). I am using the same ISP provider, Videotron. The same speed. I was playing this game, Chivalry Medieval warfare, perfectly fine before, but now something is really wrong. Whenever I join a server, my ping skyrockets up to close to 200, sometimes drifting to 130 but never going below... and often rising back up again.Keep in mind that I filter servers by their pings. I only join servers that display a low ping (although often I won't see any, when I refresh.. there they are). I'll see a server with 30 ping, join it, and be at 200.It's entirely unplayable. Not only is it impossible to properly time parries anymore, but I also get a lot of rubberbanding. I've tested the internet here, and the speeds are accurate. 10 mbps down, 1 mbps up. I am connected to a Linksys E1200 router. I've tried everything I can possibly think of.I went into the router setup, disabled the firewall, added myself to a DMZ, tried to forward every port... rebooted the modem, my computer, the router, tried a different Ethernet cable.. nothing is working. It's very depressing. Nothing has changed on my own computer in the move. I also notice there is a delay of a second or so before I start to load a webpage when I click a link.
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Mar 2, 2013
Why a 2504 Poe? If it can not be used for AP.
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Sep 16, 2012
This is the first time I am trying my hands on wireless gears. I have 2500 WLC and 1142 AP (which I converted from Standalone to LAP).I have a layer 3 POE switch where i am using port 1 for the WLC which is a trunk port.
Port 2 is for the AP using access vlan 111
Port 3 is trunk port going to a router where i am running dhcp server for the VLANs which are as follow:
VLAN 110 -Corp Wireless (10.1.110.0/24)
VLAN 111 - AP-Mgmt (10.1.111.0/24)
VLAN 999 - Guest (10.1.101.0/24)
I wanted to block the traffic from the Guest VLAN 999 but when i apply the ACL on the Guest Interface created on the WLC, I dont see any pings going across and neither I see any hit counts on the deny statement as if the ACL is never applied.
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Jan 22, 2013
I'm planning to upgrade our WLC 2504 from 7.2.111.3 to 7.4.100.0 but the cisco site says "WLC Version 7.4.100.0 will need Prime Infrastructure Version 1.3 to be managed, Version 1.3 is not yet available to download at this point of time" Is it something about NCS? we have only 1 cisco WLC 2504 and 6 1142APs.. Also let me know is it possible to go directly from 7.2 to 7.4 ?
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Nov 28, 2012
what is the maximum number of APs supported on Cisco 2504 WLC?According to the Data Sheet it is 75:
[URL]
But according to the config guide it is 50:
[URL]
I believe the correct number is 50, but I just want to be sure.Is this a software limitation?
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