Lan connectivity Issue on autonomous AP with throttles

          Hello,
I encounter a strange problem on several AP 1242 in version 12.4(25d)JA1 of a customer :
He has 10 autonomous AP covering a factory and is using them for laptop connectivity and TOIP with mainly 7921 Cisco Wifi Phones.
The phones are configured to use only 802.11a.
The APs loose LAN connectivity randomly and therefore the clients don't work anymore.
The AP are connected on a 2960 and a 3560 wich are in turn connected on a 3750 wich route the trafic.
After checking spanning-tree no loops are present.
When I check the counters on the AP involved I see the "trhottles" and "ignored" counters incrementing on the fa0 link of the AP impacted wich mean I think it can't handle the incoming traffic. This incoming traffic seems not to be too big however. I can see drops on the switch interface connecting the AP.
There is a lot of roaming on the AP due to people walking in the factory with their wifi phones.
Here is a view of the fa0 counters :
AP1242-LOGIST#sh int fa0
FastEthernet0 is up, line protocol is up
Hardware is PowerPCElvis Ethernet, address is 001d.a1ce.26e2 (bia 001d.a1ce.26e2)
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 100Mb/s, MII
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/160/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 81000 bits/sec, 53 packets/sec
5 minute output rate 29000 bits/sec, 26 packets/sec
     7447113 packets input, 674891974 bytes
     Received 286839 broadcasts, 0 runts, 0 giants, 549631 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 549631 ignored
     0 watchdog
     0 input packets with dribble condition detected
     4422100 packets output, 609868806 bytes, 0 underruns
     0 output errors, 0 collisions, 4 interface resets
     1 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
Here is a small part of logs concerning roaming, i don't see errors or log indicating that something is wrong nor in the switches log :
Jun 6 12:57:27.007: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001E4A3EE15D 001e.4a3e.e15d Associated KEY_MGMT[WPAv2 PSK]
Jun 6 12:57:42.499: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 12:58:02.620: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 12:58:03.653: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 12:59:15.564: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 12:59:15.564: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 12:59:41.905: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 442b.0355.ab28 Reason: Previous authentication no longer valid
Jun 6 12:59:54.728: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP442B0355AB28 442b.0355.ab28 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:01:12.541: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:02:35.841: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001e.4a3e.d875 Reason: Previous authentication no longer valid
Jun 6 13:02:36.489: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   ec85.2f7c.c837 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:03:29.256: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:03:29.256: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:04:32.754: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001E4A3ED875 001e.4a3e.d875 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:06:47.858: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001e.4a3e.e15d Reason: Previous authentication no longer valid
Jun 6 13:07:18.107: %DOT11-6-ROAMED: Station 001f.6c7a.5101 Roamed to 001d.a2bb.15b0
Jun 6 13:07:18.107: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001f.6c7a.5101 Reason: Sending station has left the BSS
Jun 6 13:07:38.109: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:07:42.031: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:07:42.031: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:07:46.489: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001F6C7A5101 001f.6c7a.5101 Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:27.712: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:44.502: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:08:44.572: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:56.778: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:08:56.779: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:09:17.874: %DOT11-6-ROAMED: Station 001f.6c7a.5101 Roamed to 003a.9a92.8d70
Jun 6 13:09:17.874: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001f.6c7a.5101 Reason: Sending station has left the BSS
The AP are configured as follow :
Current configuration : 5184 bytes
! No configuration change since last restart
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname AP1242-LOGIST
logging rate-limit console 9
aaa new-model
aaa authentication login default local
aaa authorization exec default local
aaa session-id common
clock timezone gmt+1 1
clock summer-time gmt recurring last Sun Mar 2:00 last Sun Oct 3:00
dot11 syslog
dot11 vlan-name Data vlan 11
dot11 vlan-name Voix vlan 14
dot11 vlan-name Webguest vlan 5
dot11 ssid WLAN_data
   vlan 11
   authentication open
   authentication key-management wpa
   mbssid guest-mode
   wpa-psk ascii 7 10600C0E261B173C252203797479633F371A29
dot11 ssid WLAN_voice
   vlan 14
   authentication open
   authentication key-management wpa
   mbssid guest-mode
   wpa-psk ascii 7 080F49592A1500203B2D25567A7A7622263C0C
dot11 ssid Webguest
   vlan 5
   authentication open
   mbssid guest-mode
dot11 wpa handshake timeout 1000
dot11 arp-cache
dot11 priority-map avvid
dot11 phone
power inline negotiation prestandard source
class-map match-all _class_voice0
match ip dscp ef
class-map match-all _class_voice1
match ip dscp cs3
policy-map voice
class _class_voice0
set cos 6
class _class_voice1
set cos 3
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption vlan 11 mode ciphers aes-ccm
encryption vlan 14 mode ciphers aes-ccm
ssid WLAN_data
ssid WLAN_voice
ssid Webguest
mbssid
power client 17
channel 2472
station-role root
dot11 qos class voice local
    admission-control
    admit-traffic narrowband max-channel 75 roam-channel 6
dot11 qos class voice cell
    admission-control
no cdp enable
infrastructure-client
interface Dot11Radio0.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
bridge-group 5 subscriber-loop-control
bridge-group 5 block-unknown-source
no bridge-group 5 source-learning
no bridge-group 5 unicast-flooding
bridge-group 5 spanning-disabled
interface Dot11Radio0.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
bridge-group 11 subscriber-loop-control
bridge-group 11 block-unknown-source
no bridge-group 11 source-learning
no bridge-group 11 unicast-flooding
bridge-group 11 spanning-disabled
interface Dot11Radio0.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
bridge-group 14 subscriber-loop-control
bridge-group 14 block-unknown-source
no bridge-group 14 source-learning
no bridge-group 14 unicast-flooding
bridge-group 14 spanning-disabled
interface Dot11Radio1
no ip address
no ip route-cache
encryption vlan 11 mode ciphers aes-ccm
encryption vlan 14 mode ciphers aes-ccm
ssid WLAN_data
ssid WLAN_voice
ssid Webguest
no dfs band block
mbssid
channel dfs
station-role root
interface Dot11Radio1.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
bridge-group 5 subscriber-loop-control
bridge-group 5 block-unknown-source
no bridge-group 5 source-learning
no bridge-group 5 unicast-flooding
bridge-group 5 spanning-disabled
interface Dot11Radio1.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
bridge-group 11 subscriber-loop-control
bridge-group 11 block-unknown-source
no bridge-group 11 source-learning
no bridge-group 11 unicast-flooding
bridge-group 11 spanning-disabled
interface Dot11Radio1.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
bridge-group 14 subscriber-loop-control
bridge-group 14 block-unknown-source
no bridge-group 14 source-learning
no bridge-group 14 unicast-flooding
bridge-group 14 spanning-disabled
interface FastEthernet0
no ip address
no ip route-cache
speed 100
full-duplex
no cdp enable
hold-queue 160 in
interface FastEthernet0.1
encapsulation dot1Q 1 native
no ip route-cache
no cdp enable
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface FastEthernet0.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
no bridge-group 5 source-learning
bridge-group 5 spanning-disabled
interface FastEthernet0.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
no bridge-group 11 source-learning
bridge-group 11 spanning-disabled
interface FastEthernet0.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
no bridge-group 14 source-learning
bridge-group 14 spanning-disabled
service-policy input voice
service-policy output voice
interface BVI1
ip address 10.17.10.5 255.255.255.0
no ip route-cache
ip default-gateway 10.17.10.254
ip http server
ip http authentication aaa
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
logging trap warnings
logging 10.15.51.115
no cdp run
bridge 1 route ip
line con 0
line vty 0 4
sntp server 10.15.1.50
sntp broadcast client
end
Does someone ever experienced a similar problem ?
When I shut radio interfaces they're is no more problems on the LAN. Can this be an overlapping coverage issue ?
Can someone please give me advices on how to troubleshoot this issue ?
Thank you in advance as I'm a bit stuck.
Best Regards,

Hi Scott,
Thanks for your reply.
Do you think this can be the origin of the issue my customer encounters or is it only to be standard ? As this change will have to be made on all clients, if there is a chance it solves the problem I will do it ASAP, if not I will delay it in a less busy period :-)
Can the constant roaming associations and dissasociations overload the AP and make it stop responding on the LAN or is it only a throuhput problem ?
Thanks in advance for your answer.
Best Regards,

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Hi there,
I have an installation of Lookout 6.0 coupled with the OPC Inductrial Automation servers. In my application, we are running two instances of the GE Versamaz Ethernet driver to communicate with two remote (over the internet) GE Fanuc Versamax PLCS.
Every few days, the two PLCs lose connectivity. It does not appear to be a LAN connectivity issue as I can still log into the PLCs using the GE software. To fix the issue, the Lookout software must be restarted.
Has this been seen by anybody else? This poses a significant problem as lookout is used to monitor the PLCS at sewage stations - each time the connections are lost we have to deploy technicians to the sites to ensure all is working.
-andrew

Hello Andrew,
When the connection is terminated are you getting any errors or alarms? If so what are they? Also you can try to replace the object that is connected to the PLC and make sure it has the correct settings. It may also be due intermittent networking issues, losing connection and not able to connect with the object again unless Lookout is restarted again. I have not heard about any such networking issues. The attached document can be used for reference.
Regards,
RMM
http://digital.ni.com/public.nsf/websearch/5ECD2AFA039B45C186256B1300621722?OpenDocument

Having issues getting Apple TV to connect to comcast wifi. Sees the router' enter password and says unable to connect. Router connected to iPad and pcs with no issues..., thoughts?

At a loss. Have comcast wifi. No issues connecting to iPad and laptop. However, when I try to connect iPhone 5 with OS 7 or applets with latest software I get unable to connect message. I can get the iPhone to connect if right next to modem, but unable to connect one room away. iPads have no issues and connect from any room.

Hello Tvsteven,
Thank you for providing all the details regarding the Wi-Fi connection issue you are experiencing with your Apple TV. I found an article with some steps you can take to troubleshoot an issue like this.
I recommend reviewing the full article, but the section titled "If you can see your Wi-Fi network, but you are unable to connect to it" specifically stands out to me for the situation you described:
Apple TV (2nd and 3rd generation): Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/TS4546
Thank you for using Apple Support Communities.
Best,
Sheila M.

Ask the Expert : Initial Set Up and LAN Connectivity for Cisco UCS Servers

Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about related to the initial setup of UCS C & B Series which include LAN connectivity from the UCS perspective with Cisco subject matter expert Kenny Perez.
In particularly, Kenny will cover topics such as: ESXi/Windows installations, RAID configurations (best practices for good performance and configuration), VLAN/Jumbo Frames configuration for B series and C series servers, Pools/Policies/Upgrades/Templates/Troubleshooting Tips for blade and rack servers, Fabric Interconnects configuration, general compatibility of Hardware/Software/drivers amongst other topics
Kenny Perez is a technical leader in Cisco Technical Assistance Center, where he works in Server Virtualization support team. His main job consists of supporting customers to implement and manage Cisco UCS B series and C series. He has background in computing, networking, and Vmware ESXi and has 3+ years of experience support UCS servers and is VCP certified.
Remember to use the rating system to let Kenny know if he has given you an adequate response.
This event lasts through October 10th, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hi,
Actually we have UCS 6248 fabric interconnect - first twelve ports are enabled and same in Cisco UCS Manager.
But when more port will be active by expansion module then UCSM can manage that too or need any other licence for UCSM too?

Connectivity Issue - Server Network

Hi you all
I'm having connectivity issues, from my network, with the Servers Network that's located behind the Ace 4710... I'm monitoring the servers and i get Timeouts with a simple ICMP monitor...
I never have problems regarding the access to the Admin context, but in the context that i use to load balance the applications i have problems
reaching directly the servers...
For example... I have two servers and i lose connectivity with one of them for about 2-5 minutes and then i regain connectivity... If i undo the ft group and redo the ft group i regain instant access to the server...
I cleared all the config for the actual loadbalance and left the config regarding the client and server networks...
Any help??
Thanks in advance...

Thanks for the reply Gilles...
What do you mean with a show tech...
I'm looking at you blog posts...To see if it helps...

Connectivity Issue - Server Network - Windows Servers

Hello
I'm having connectivity issues, from my network, with the Servers Network that's located behind the Ace 4710... I'm monitoring the servers and i get Timeouts with a simple ICMP monitor... This problem is only with Windows Servers...
I never have problems regarding the access to the Admin context, but in the context that i use to load balance the applications i have problems
reaching directly the servers...
For example... I have two servers and i lose connectivity with one of them for about 2-5 minutes and then i regain connectivity... If i undo the ft group and redo the ft group i regain instant access to the server... As i said this problems only appear with Windows Servers...
Thanks in advance...

Thanks for the reply Gilles...
What do you mean with a show tech...
I'm looking at you blog posts...To see if it helps...

Cannot reach live chat for a Photosmart 7520 connection issue

I am trying to reach live chat for a connection issue which I dealt with last week with my Photosmart 7520. I have case number and my printer is under warrenty.

I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publically post ( serial numbers and case details).
If you are unfamiliar with how the Forum's private message capability works, you can learn about that here.

BPC 4.2 connectivity issues with server

Hello All, I have a user that is experiencing connectivity issues with our server. This appears to be at a client level and I would like to know how to correct it. We are currently using BPC 4.2 (service pack 2).
The problem occurred when they had IE8 uninstalled and installed IE6 today. This morning he had no issues connecting to BPC w/ IE8, but lost that connection when IE6 was installed. When working through the connection wizard, the following errors appear.
Here are the pop-up error messages they are receiving:
"The server name, or IP address (srvbpmarl01) is unreachable now. Please check the following:
1. LAN connection or Internet connection is working properly.
2. Server name or IP address is invalid
Detailed Error Message: Internet connection is not available"
"The system cannot download information from server: SRVBPMARL01.
There may be a network or security issue.
Error message: Your LAN connection or Internet connection is not working properly.
Detailed error message: Internet connection is not available."
I can't help but feel this issue is a result of the IE 8/6 complications, but I do not know which actions to take next.
Thanks for any help you could provide!

I don't think the problem is related to IE.
It seems to be more a problem of configuration of IE.
I suggest to chec the follow:
1. Please make sure you are not using any proxy into connection of IE. Ot if you neede then make sure you will add your server into exceptions of proxy.
2. Try to connect with IE to server. use: http://nameofserver/osoft and also http://nameofserver.
If you received errors in both cases then it seems it is a problem with installaion of IE.
If you are able to connect and to display the default page for osoft then it must be a configuration problem.
I suppose MSDTC or Pivot table services is not correct.Try to use slow connection when you connect to server not High connection.
Regards
Sorin Radulescu

Lan connectivity Issue on autonomous AP with throttles

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