Aironet 1250 Overlapping Channels

Hi,
In my LAN, I have always been used an Aironet 1250 for internal use and always work fine. Now, I added a 3com AP but both AP are not correct. When I turned off the AIRONET 1250, the 3COM AP settings works fine. When both are turn on, the 3COM AP loses connectivity all the time.
I have heard about the overlapping channels in 802.11b/g networks.
Someone could tell me what I could do for solving this?
Note: Due to restrictions on my security lan, I could not use two SSID(using vlans) on my aironet 1250. This will be the best scenario, but it was not possible.
Thanks in Advance,
Fernando

yes. The Aironet 1250 connects to a DHCP server in the range 10.150.x.x and the 3com AP connects to a range 192.168.1.x. The DHCP servers are in different places and there is no any possibility that they could overlap one and another.
But I realized that the problem must be between the two access point because the 3 com AP got an IP Address from the range 10.150.x.x(it sounds crazyness but its true). Offcourse, soon the 3COM AP loses the connection.
Tks you very much,
Fernando

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Aironet 1250

I have an interesting problem. I have an aironet 1250. For months my wireless clients has been connecting with no problems. One day there was a power failure, don't remember making any chnages which I should of saved. After, all of my equipment rebooted with no problems. Now I'm seeing my 802.11N clients having connectivity problems. After 10 to 40 mins I believe they get logout, but the client don't get updated to this. The G and the B no problems. Some are Intel chip sets and some are apples base computers.
Anyone seen this?
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname blackhole
aaa new-model
aaa group server radius rad_eap
aaa group server radius rad_mac
aaa group server radius rad_acct
aaa group server radius rad_admin
aaa group server tacacs+ tac_admin
aaa group server radius rad_pmip
aaa group server radius dummy
aaa authentication login eap_methods group rad_eap
aaa authentication login mac_methods local
aaa authorization exec default local
aaa accounting network acct_methods start-stop group rad_acct
aaa session-id common
clock timezone -0500 -5
clock summer-time -0400 recurring
ip domain name javabeans
ip ssh version 2
dot11 ssid JavaBeans
authentication open
authentication key-management wpa version 2
guest-mode
wpa-psk ascii 7 033E5D060F0EB78723C3E1815142B053225535E52754556204D116C577F784846032369512E0C40553B2301080C5219177A683E16
dot11 ids mfp distributor
dot11 ids mfp detector
dot11 ids mfp generator
power inline negotiation prestandard source
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption mode ciphers aes-ccm
ssid JavaBeans
antenna gain 2
speed basic-1.0 basic-2.0 basic-5.5 basic-11.0 basic-6.0 basic-9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
packet retries 128
station-role root
l2-filter bridge-group-acl
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 input-address-list 750
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface Dot11Radio1
no ip address
no ip route-cache
encryption mode ciphers aes-ccm
ssid JavaBeans
antenna gain 3
dfs band 1 2 3 4 block
speed basic-6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
channel width 40-above
channel 5180
station-role root
no dot11 extension aironet
l2-filter bridge-group-acl
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 input-address-list 750
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface GigabitEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface BVI1
ip address 10.5.15.1 255.255.0.0
ip helper-address 10.5.20.1
no ip route-cache
ip default-gateway 10.5.1.1
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
ip radius source-interface BVI1
logging history size 50
logging history notifications
logging 10.5.20.1
snmp-server community java RO
radius-server attribute 32 include-in-access-req format %h
radius-server vsa send accounting
bridge 1 route ip
line con 0
session-timeout 30
line vty 0 4
session-timeout 30
sntp server 10.5.1.1
sntp broadcast client
end

this is what I got from the AP
2009-04-17 15:59:47 Local7.Info 10.5.15.1 214: Apr 17 19:59:46.885: %DOT11-6-ASSOC: Interface Dot11Radio0, Station blackhole 0013.e871.5b29 Associated KEY_MGMT[WPAv2 PSK]
2009-04-17 15:59:52 Local7.Info 10.5.15.1 215: Apr 17 19:59:51.969: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 0013.e871.5b29 Reason: Sending station has left the BSS
2009-04-17 16:00:55 Local7.Info 10.5.15.1 216: Apr 17 20:00:54.298: %DOT11-6-ASSOC: Interface Dot11Radio0, Station blackhole 0013.e871.5b29 Associated KEY_MGMT[WPAv2 PSK]
2009-04-17 17:04:56 Local7.Warning 10.5.15.1 218: Apr 17 21:04:55.640: %DOT11-4-CCMP_REPLAY: AES-CCMP TSC replay was detected on a packet (TSC 0x102313) received from 0013.e871.5b29.
2009-04-17 17:05:24 Local7.Warning 10.5.15.1 219: Apr 17 21:05:23.570: %DOT11-4-CCMP_REPLAY: AES-CCMP TSC replay was detected on a packet (TSC 0x10C31F) received from 0013.e871.5b29.
it looks like the clients reconnect 30mins later after, what ever happens.

Aironet 1250 and AIR-ANT2430V-R

Hello,
I've just installed a Aironet 1250 and AIR-ANT2430V-R antenna.
I could do with some pointers on configuring the 2.4Ghz radio interface.
Role: Access Point
Goal: Blanket office coverage
Channel width: 20Mhz or 40+ ?
External Antenna Configuration: Enable
Gain: ??db
Currently I'm seeing speeds between 1Mbps and 144Mbps, with sporadic coverage.
I was expecting Â£900+ equipment to be better than the Â£10 D-link POE WAP currently installed! =]
Thank you in advance
K

Do you have the rp-tnc connectors fastened tightly?
How are you measuring the bitrate?
Also, have you tried using a tool such as iperf to measure actual throughput and not bitrate?
If you are running 802.11n rates on the 2.4 spectrum and plan to deploy more APs on the network, you will want to stay away from channel bonding.
We do not run 802.11n on the 2.4 side, only the 5Ghz side.

Wireless aironet 1250 agn latency issue

HI , i have cisco wirelss AIRONET 1250 a/g/n Series.
when user connect to this wifi n try to ping any local lan ip then their is ping delay & latency of 2000-3000 ms & packet drop also.
please check the below configuration & help me in case of any misconfiguration in the device.
Building configuration...
Current configuration : 4384 bytes
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname XXX
enable secret 5 $1$v308$CW4$GD@#&HDFSDDIF6F0
no aaa new-model
dot11 ssid XXX
authentication open
guest-mode
power inline negotiation prestandard source
crypto pki trustpoint TP-self-signed-1965857182
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1965857182
revocation-check none
rsakeypair TP-self-signed-1965857182
crypto pki certificate chain TP-self-signed-1965857182
certificate self-signed 01
3082024A 308201B3 A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 31393635 38353731 3832301E 170D3032 30333031 30303030
32385A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 39363538
35373138 3230819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100A2C0 8F1CE9DC C0960B16 AFCB867C A83E82EF 13DE3AF0 11D91EF1 B23916A5
4F3793D0 8DE9FF37 3122C0C3 ACB5D5F0 7A5E340B 92801A4A 079D37D6 9536B912
2C5F9690 E8252680 8E53B55F 8F08D429 F61751CC 251EDC64 0B9FBB85 41A3C7B9
4A8DB41A A05BC1A6 48A82E8C 6C3990E1 5EF7FCB4 2E3804A4 76BC8105 AE34BDB7
15CF0203 010001A3 72307030 0F060355 1D130101 FF040530 030101FF 301D0603
551D1104 16301482 1242454E 4554544F 4E2D3153 54464C52 2D415030 1F060355
1D230418 30168014 EE87BD76 491710D6 66CB597F 40D14C5B BD380E5E 301D0603
551D0E04 160414EE 87BD7649 1710D666 CB597F40 D14C5BBD 380E5E30 0D06092A
864886F7 0D010104 05000381 81002B48 702D2B54 C3254447 083F0303 23B5D303
40028EDC DFB13D91 6609B86E B7A128FC 241F1AA4 2AF575CE 631A84FA A10C4B05
B778DF8B FE6CB872 D7C4EAAF 59BA2104 86DA2A5A 08DDC234 3B4974E4 84746AD8
032CC895 077CBBA6 CFB4F2B0 C9AA9FBC 9C16E874 4B2399CD 81F0F815 8CEEBB07
D2A15526 26843037 F8216D96 527A
quit
username Cisco password 7 F56GFH45@^$@
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption key 1 size 40bit 7 BE665G23128CFE transmit-key
encryption mode wep mandatory
ssid XXXX
speed basic-1.0 2.0 5.5 11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface Dot11Radio1
no ip address
no ip route-cache
encryption key 1 size 40bit 7 3046778GHN5G4527E9D transmit-key
encryption mode wep mandatory
ssid XXXX
antenna gain 128
no dfs band block
speed basic-6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
channel dfs
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface GigabitEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface BVI1
ip address 192.168.1.7 255.255.255.0
no ip route-cache
ip default-gateway 192.168.1.3
ip http server
ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
snmp-server view dot11view ieee802dot11 included
snmp-server community public view dot11view RO
snmp-server location First Floor
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps tty
snmp-server enable traps entity
snmp-server enable traps disassociate
snmp-server enable traps deauthenticate
snmp-server enable traps authenticate-fail
snmp-server enable traps dot11-qos
snmp-server enable traps switch-over
snmp-server enable traps rogue-ap
snmp-server enable traps wlan-wep
snmp-server enable traps config-copy
snmp-server enable traps config
snmp-server enable traps syslog
snmp-server enable traps cpu threshold
snmp-server enable traps aaa_server
snmp-server host 192.168.1.10 public
bridge 1 route ip
line con 0
line vty 0 4
password 7 094F5JG59GBHGA0A
login
end
Waiting for the suggestons ..

Did you plug antennas on the AP ?
Can you take a show dot11 assoc all on the AP command line so that we can see the signal strenght ?
Does this happen only on b/g/n radio or also on a/n radio ?
Nicolas

Cisco Prime Infrastructure 1.2 and Aironet 1250 + VSS issues

Hi,
I am new to the NCS implementations and configurations. I have one very specific case with Cisco Prime Infrastructure 1.2 and autonomnous APs and several issues with Cisco VSS on 6500 switches.
So here is the version from Prime:
NCS/admin# show version
Cisco Application Deployment Engine OS Release: 2.0
ADE-OS Build Version: 2.0.1.038
ADE-OS System Architecture: x86_64
Copyright (c) 2005-2010 by Cisco Systems, Inc.
All rights reserved.
Hostname: NCS
Version information of installed applications
Cisco Prime Network Control System
Version : 1.2.1.012
IOS version on our APs (which are autonomnous) is:
AP-N-1>show ver
Cisco IOS Software, C1250 Software (C1250-K9W7-M), Version 12.4(25d)JA1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 11-Aug-11 03:23 by prod_rel_team
Well the issue what we have now is that access point has been added but its not recognized by the NCS prime. I have tried all three versions of SNMP but I get the same result. The SNMP configuration is valid since I use the same for my switching infrastructure. When I enter "debug snmp packets" and "terminal monitor" I can see the SNMP communication between Prime and Aironet 1250 which is standalone.
When I switch to Lifecycle theme and go to Operate > Device Monitor Center I see all devices I have added. The Aironet 1250 is reachable but under collection status I get Managed with Warnings. When I hover over with my mouse I get "None available".
I have successfully added my switching infrastructure in total, which is operating perfectly for Catalyst 2960/3650/3750/4500 series but for 6500 under VSS I have some warnings. The device is recognized by the system which is excellent and all is operational. I get the following errors under Collection Status:
feature_sensor
SNMP request timed out
feature_powerSupplyFanStatus-6k
SNMP request timed out
IdentityCapability
The device is unreachable.
feature_flashdevice
SNMP request timed out
sam_ipsla_feature
The device is unreachable.
What can be done to resolve these issues ? I have attached a screenshot of this particular issue. The affected access point is 172.16.165.241.
Predrag Petrovic

Hi rajeeshp,
Currently I am not allowed to upgrade it because of internal procedures involved in upgrading a specific piece of software (obtaining permissions from various departments). Is it free to upgrade from 1.2 to 1.3 or there is a specific charge for that.
Predrag Petrovic

4 Aironet 1250's and a controller?

Hi guys,
I'm about to order a four Aironet 1250's and a 2106 Wireless LAN Controller. From what I've read, I'll need the controller to manage the APs if I want them all to offer the same broadcast domain and subnet, and offer roaming to the users. Often times what I read and understand turns out to have little to do with reality, so my question is, am I correct about this?
Thanks in advance!
Joe

http://www.cisco.com/en/US/docs/wireless/controller/4.2/configuration/guide/c42ovrv.html#wp1133151
These hardware features are not supported on 2000 and 2100 series controllers:
•Power over Ethernet (PoE) [2000 series controllers only]
Note Ports 7 and 8 on 2100 series controllers are PoE ports.
•Service port (separate out-of-band management 10/100-Mbps Ethernet interface)
These software features are not supported on 2000 and 2100 series controllers:
•VPN termination (such as IPSec and L2TP)
•Termination of guest controller tunnels (origination of guest controller tunnels is supported)
•External web authentication web server list
•Layer 2 LWAPP
•Spanning tree
•Port mirroring
•Cranite
•Fortress
•AppleTalk
•QoS per-user bandwidth contracts
•IPv6 pass-through
•Link aggregation (LAG)

Unable to Connect to Cicso Aironet 1250

My office just bought the Cisco Aironet 1250 and I am task to set it up. Right now, I am unable to connect to AP even when it is configured as Open Authentication without encryption. Tried using both laptops and our products to no avail. The same laptops and products are able to connect to other wireless routers So far, only my Linksys Wireless-G USB network Adapter is able to detect it.
We are very puzzled by this because we are able to setup and connect to it initially. But when we try to reconfigure it to another setting, everything starts to fail. We have tried doing factory default.
The AP is connect only to a Windows 2003 Server running DHCP and IAS. Appreciate if someone can help me on this. Thanks

Hi All,
Here are screen capture of my configuration
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/ExpressSetup.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-EncryptionManager.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-EncryptionManager.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-SSIDManager02.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-SSIDManager03.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-SSIDManager03.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-SSIDManager03.jpg
http://img.photobucket.com/albums/v146/tiger3687/Cisco%20AP%201250/Security-ServerManager.jpg

Cisco Aironet 1250 - How to bridge two AP's and get Non-root to talk to Root AP

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      I have two buidlings acroos the street from each other. I have two Cisco Aironet 1250 wireless AP's with the first one going in the main building with network backbone. The Second AP goes across the street with the other wired network segment. Both AP's have long range antenas 2.4 GHZ on top of each building. I have configured the 1st one as the Root Bridge. The one across the street is configured as non-root bridge. I have both AP's configured with the same WEP key and also with the same SSID name with both set to broadcast it.   I am still unsure and confused as to how I get the non-root bridge to talk to and use the root bridge to get on the main network.
        1- It’s main to use the Root parent Mac address.
        2- Is there another config that I am missing to get the signal?
Note: I still not getting any signal from the root although distance between root and non-root is 330m
My root antenna is AIR-ANT24120 and non-root antenna is AIR-ANT1949 and attached files is my configuration files
Thank you.

1. How are the AIR-ANT24120 and the AIR-ANT1949 installed?
the AIR-ANT24120 is connected virtically on tower far 11m from the earth and AIR-ANT1949 is connected horizontally on tower far 10m from the earth
2. What is the distance between both APs?
350 m
3. Do you have clear line-of-sight between the two?
there is one tanker in the middle between them but it's far 7m from the earth
4. Is the two APs properly aligned?
i think yes and changed the aligned many times without any news (I don't have any tools for alignment)
5. Which point are the antennas connected to? Primary, Secondary or middle?
I tried in the primary and secondary but never tried the middle antenna
Thanks

Aironet 1250 Configuration Help

Hello to all,
I'm an vmware\linux system administrator with very low skills in networking, I just bought 3 Cisco Aironet 1250 2.4ghz + 5ghz for my testing network and I need help to configure them.
Scenario:
1 - I have 3 Cisco Aironet 1250
2 - I want to create 2 wifi networks, SSID guest (vlan 11) and SSID production (vlan 1) in 2.4ghz + 5ghz
2a- I want to configure security WPA2-PSK without RADIUS Server.
3 - Aironet 1250 # 1 is connected to ethernet vlan1 (production)
4 - Aironet 1250 # 2 is connected to ethernet vlan11 (guest)
5 - Aironet 1250 # 3 is connected to ethernet vlan1 (production)
These are the first configuration commands found:
configureno ip domain-lookupline vty 0 4no exec-timeoutenableconfigure terminalinterface dot11radio 0encryption vlan 1 mode ciphers aes-ccmssid Productionvlan 1authentication openauthentication key-management wpa version 2wpa-psk ascii password1guest-modeend interface dot11radio 1encryption vlan 11 mode ciphers aes-ccmssid Guestvlan 11authentication openauthentication key-management wpa version 2wpa-psk ascii password2guest-modeend
When I try to set the repeater configuration webinterface tells me configuration errors.
Any help is welcome, sorry for my newbie!
Thanks a lot!

Since each AP is connected via Ethernet, you don't need to set any as a repeater. Here are some links that show you what you need to have multiple SSID's and multiple vlans.
http://www.cisco.com/en/US/docs/wireless/access_point/12.2_11_JA/configuration/guide/s11ssid.html
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a0080665ceb.shtml
Tech Guides
http://www.cisco.com/en/US/products/hw/wireless/ps4570/prod_configuration_examples_list.html
Sent from Cisco Technical Support iPhone App

Aironet 1250 AP

Will the Cisco Aironet 1250 (802.11n) only require an Firmware upgrade after it has been approved for use and gets past draft 2.0? Im thinking of purchasing for testing but want to make sure that being that its in its early stages that the code will only need to be upgraded once the standards have been created.
Anyone know?
Thanks!

Hi Adam,
Have a look at these answers from Cisco;
Q. What is the procedure for upgrading radios in the Cisco Aironet 1250 Series Access Points once future technologies become available?
A. The Cisco Aironet 1250 Series was designed as a modular and upgradable access point platform. When new radio modules become available, the old radio module may easily be removed and replaced in the field.
Q. Will Cisco guarantee that the Cisco Aironet 1250 Series can be upgraded to support the final 802.11n standard?
A. Cisco cannot guarantee that the current Cisco Aironet 1250 IEEE 802.11n draft 2.0 standard radio modules can be software-upgraded to support the final 802.11n standard. However, the modularity of the Cisco Aironet 1250 helps ensure that should the final 802.11n standard require a hardware modification, the impact will be limited to just the radio modules, and will not require a change to the access point. The Cisco Aironet 1250 Series radio modules are field-upgradeable and easy to change.
Investment protection: The Cisco Aironet 1250 Series is a powerful, modular and upgradeable platform that provides support for the IEEE 802.11n draft 2.0 standard today. Platform modularity ensures a smooth migration path to emerging higher-performance wireless technologies and future advanced services.
From this good Q & A doc;
http://www.cisco.com/en/US/products/ps6973/products_qanda_item0900aecd806b7c82.shtml
Hope this helps!
Rob

[svn] 4323: Bug: LCDS-544 - Scenario where two components have seperate channel sets with overlapping channels not working .

Revision: 4323
Author: [email protected]
Date: 2008-12-15 19:23:10 -0800 (Mon, 15 Dec 2008)
Log Message:
Bug: LCDS-544 - Scenario where two components have seperate channel sets with overlapping channels not working.
QA: Yes
Doc: No
Checkintests Pass: Yes
Details:
* Hunting to a new channel within a channelset never triggered a disconnect from the previous channel(s). This isn't a problem in general, but does becomes a problem when an app defines two distinct channelsets containing at least one shared channel at the head of the list. In this case, the first channelset hunts past it and connects on a later channel. But when the second channelset hunts through (triggering a connect fault when it hits that initial shared channel that can't connect), the fault is processed by the first channelset as well (incorrectly).
Ticket Links:
http://bugs.adobe.com/jira/browse/LCDS-544
Modified Paths:
flex/sdk/trunk/frameworks/projects/rpc/src/mx/messaging/ChannelSet.as

Running the script by python2 solves it for me:
su - mythtv -c "nice -n 19 python2 /usr/bin/tv_grab_nl_py --output ~/listings.xml"
Best regards,
Cedric

Cisco Aironet 1250 basic setup questions

Hi,
I'm going to be three Aironet 1250's within a building. There is not going to be a wireless controller, the AP's are all going to be standalone. I am going to set them all up the same, with WPA2 wireless encryption. My question is, is it important/beneficial to add configuration to the AP's so they are aware of each other (for roaming perhaps)? If so, what is this technology called and could someone point me towards a section of a guide that could illustrate this?
Or am I good with just configuring 3 standalone AP's as is.
Any other pointers are welcome.
Thanks!

Hi,
On Autonomous APs you can use Wireless Domain Services (WDS) technology which allows the APs to be aware of each other and make roaming faster withouth needing full authentication each time the clients move from one AP to the other.
Basically you configure the same SSIDs on all 3 APs, then only one will act as primary WDS.
The primary WDS will be responsible for the communication between the clients and the RADIUS server, and the infrastructure APs will simply bypass all the info from the clients to the primary WDS and vice-versa.
Evenually you can configure standby WDS with different priorities so that in case of the primary WDS goes down, another AP assumes the role of active WDS.
Configuration Example via AP GUI:
http://www.cisco.com/en/US/products/hw/wireless/ps458/products_configuration_example09186a008059a559.shtml.
In attach you can find an example of config using WDS and Infra APs. You will find example to configure open ssid, psk, and eap using WPA2.
3 diferent vlans.
Clients authenticate against External RADIUS Server and APs authenticate on local RADIUS for WDS.
HTH,
Tiago

Non-Overlapping channels bleed over

I have multiple AP's in an arena enviornment. Now without violating the rule where an AP is assigned a non-overlapping channel, what is best practice if there are neighboring AP's within close proximity of each other and they are assigned the same channel?
For example, in our press level I have 2 AP's both on channel 11, the suite level below has a few more ap's where the signal bleeds over to the press level and even if some were on channel 1, 6, & 11 there would still be conflicting channels. I hope this questions makes sense.

Thanks for the points Rob! Things have been pretty busy the last couple months.
Planning RF fields is a three-dimensional thing, more or less dependent on the construction materials laterally and vertically.
Given that there are only the three channels (for 802.11g), you have no option other than stacking and staggering, like:
level3: 1--6--11--1--6--11--1--6--11
Level2: 6--11--1--6--11--1--6--11--1
Level1: 11--1--6--11--1--6--11--1--6
With the only real variation being the type of antennas you choose, the topology of the spaces, and the power levels of the APs. There's really no other way to do it (using only 802.11g).
NOW, what I'd recommend that you recommend is to add the additional capability for 802.11a. Many/most computer systems have dual band capability, most (Cisco) APs are rigged for dual band.
So light up that 802.11a channel and encourage the folks that can to move up there. It's an easy sell: more bandwidth ("sorta" ...but we're marketing here so outright lies are generally permitted), less interference, and better security (from the aspect of fewer hackers work this band because there's not enough "interesting" stuff on it, etc.).
The benefit to you is that you would have 40 non-overlapping channels ... much easier to plan.
I understand that you have some equipment and users that must remain on 802.11g (try to forbit B if you can, it's making the system slower and reducing your availability), but usually if you offer / encourage those with the capability to move to the better band, they'll take it.
Otherwise, start looking for places where you could say " You know, if I had an antenna with *this* kind of pattern, I could ..." because there probably is an antenna, somewhere, with that radiation pattern.
What you can't get in pattern, you can make up for with barriers, reflectors, etc.
Good Luck
Scott

Non-overlapping channels - 802.11a/n - need clarification

There seems to conflicting or inconclusive information the topics below. I have just been readying various docs using google searches. I am hoping to get some solid answers.
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network?
Thank you,

Hi Jacob,
Following diagram should helps you (Ref source )
Referencing this & if you look at your 4 queries you can find the proper answer. Here is my response
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
As you can see, excluding UNII-2 extended there are 12 non overlapping channels (13 including CH165), depends on the different country regulations you can use those for indoor/outdoor deployments.
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
It depend on the courntry regulation. I think in US you can use that band(UNII-3) for both indoor/outdoor deployments. So in that case 12 CH availabel excluding UNII-2 extend band.
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
802.11n in this band, you can aggregate two 20MHz channel, (effective 40MHz bandwidth). You can see 6 non-overlapping channels available with 40MHz width in those bands (80MHz & 160MHz option shown in the above diagram applicable to 802.11ac standard)
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network
802.11n device will communicate with 40MHz (if configured on you wireless network & client support channel bonding) & normal 802.11a client will connect using 20MHz channel without any CH bonding or aggregation
If that answers to your query pls mark this thread as "Answered"
HTH
Rasika
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Overlapping v's Non-overlapping channels...

I know it is bad practise to have more than one AP within the same cell area using the same channel, but wondered what the effects of this were. For example, if I had an AP in channel 6 and another AP ten yards from it in channel 6 also, what would be the repercussions?
Thinking about it logically, there would be radio collisions. Each AP could potentially try to transmit at the same time causing collisions. Therefore, you would see slow throughput and high error counts on the AP? Also, if a WLAN client transmitted a frame to a user on the wired network, each AP would receive it (regardless of association) and forward the frame on - resulting in the wired client receiving two copies of the same frame (one from each AP)???
Can anyone, explain why it is not good practise to have over-lapping channels (or any useful web links/documents)?
I will continue to use non-overlapping channels, but it would be nice to know why.
Thanks

Hi Darren,
That is a great question. Here are some links that have really good answers;
Channel Deployment Issues for 2.4-GHz 802.11 WLANs
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00802846a2.html#wp134263
Assigning 802.11b Access Point Channels
An important concept to note regarding channel assignments is that the channel actually represents the center frequency that the transceiver within the radio and access point uses (e.g., 2.412 GHz for channel 1 and 2.417 GHz for channel 2). There is only 5 MHz separation between the center frequencies, and an 802.11b signal occupies approximately 30 MHz of the frequency spectrum. The signal falls within about 15 MHz of each side of the center frequency. As a result, an 802.11b signal overlaps with several adjacent channel frequencies. This leaves you with only three channels (channels 1, 6, and 11 for the U.S.) that you can use without causing interference between access points.
From this link;
http://www.wi-fiplanet.com/tutorials/article.php/972261
Channels and international compatibility
Although the statement that channels 1, 6, and 11 are "non-overlapping" is incomplete, the 1, 6, 11 guideline has merit. If transmitters are closer together than channels 1, 6, and 11 (e.g. 1, 4, 7, and 10), overlap between the channels will probably cause unacceptable degradation of signal quality and throughput.
http://en.wikipedia.org/wiki/IEEE_802.11
Hope this helps!
Rob
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