Wireless Lan Controller..

[jain.manish94]

please can someone tell me some about wireless lan controller. 

1. when we connect one AP threw Switch how it send request to WLC in both , i mean L2 and L3 . please can you tell me full information regarding this....

[Ric Beeching]

Try this:

Joining Process of an Cisco Access Point

[jain.manish94]

please can you tell me what is the meaning of

If [ (L2 Mode supported on the LAP) && (WLC Discovery Succeeds)] {LAP broadcasts an LWAPP Discovery Request in a Layer 2 LWAPP frame.

Any WLC that is connected to the network and that is configured for Layer 2 LWAPP mode responds with a Layer 2 discovery response, EXIT}

Else {Discovery Algorithm in Layer 3 ( 'debug lwapp event enable' and 'debug lwapp packet enable')}

Please give me any example. 

[jain.manish94]

please can you tell me what problem may be here. i am getting one problem 

that is

Wifi of laptop suddenly went offline while connecting to database.

what i check ....

[jain.manish94]

Wifi of laptop suddenly went offline while connecting to database.

what i check ....

[Ric Beeching]

Sorry the problem is far too ambiguous to help with and may not even be a Cisco Wireless Issue. Things to checkout of the many possibilities:

1. Are other clients on in the same area
2. Is that laptop on?
3. Is there enough power?
4. Are the drivers up to date?
5. Is the Access Point on in that area?
   
6. Can you see it on the WLC?
7. What is its uptime?

There could be many more questions before determining your fault.

[jain.manish94]

There is one user at site which is facing problem , 

he is connecting with wifi but after some times disconnecting and again reconnecting and some times again disconnected . what problem may be there.

only one user facing this problem 

[jain.manish94]

please can some one help me regarding the issue...

only one user facing this problem .

he is connecting with wifi but after some times disconnecting and again reconnecting and some times again disconnected. and after disconnected it takes time to reconnect like some times 5 min to reconnect, some times 15 min, 30min, 1 hour. 

1. i checked drivers on laptop --- ok

2. i changed laptop and using user id and password same problem

3. i used other user id and password on same laptop working fine.

4. i used affected user id and password on other laptop same problem.

5. i checked logs in wlc there getting AAA authentication failure error for user.

6. i want to know that why user is connecting with AP for sometimes. 

Please reply....

[Leo Laohoo]

Wifi of laptop suddenly went offline while connecting to database.

"laptop"?  Singular noun?  What about the others? 

1. i checked drivers on laptop --- ok

What is the model of the wireless NIC and what is the exact version of the driver? 

When the laptop is connected to the wireless, post the complete output to the command of "sh client detail <MAC address>"?

[jain.manish94]

where i run this command

sh client detail , because on device there is no any command like.

[jain.manish94]

please can someone tell me what is the meaning of this line.

Rogue AP: 08:59:05:22:w9:09 detected on Base Radio MAC: 20:rc:c0:r7:25:40 Interface no: 0(802.11n(2.4 GHz)) Channel: 1 RSSI: -97 SNR: 0 Classification: unclassified, State: Alert, RuleClassified : N, Severity Score: 0, RuleName: N.A. ,Classified AP MAC: 8o:00:18:5a:00:50 ,Classified RSSI: 0

[Saravanan Lakshmanan]

Its an alert message. RSSI -97 is very weak ie., this detected AP could be far away from the detecting AP. Based on your company policy requirement you can ignore or classify and manage or deep inspect or take action, if harmful.

infra device(rogue AP) - MAC oui 08:59:05 - seems to belong Intracom S.A vendor.

By default all external infra device(3rd party/nearby devices) that's not part of the managed network will be identified as an unclassified rogue by Cisco AP.

it appears the above device is detected by cisco AP as rogue under unclassified category and alert state which is the default when no classification is priorly configured ie., when Rogue management is not configured.

[Ric Beeching]

L2 - Access Points in the same subnet will discover the WLC through broadcasts

L3 - Access Points will use the 5 methods listed to discover the WLC outside of its subnet

[jain.manish94]

L3 - Access Points will use the 5 methods listed to discover the WLC outside of its subnet

which are five. ? 

[Ric Beeching]

As explained in the document. This is only for Access Points and not your laptop so if you are experiencing a dropout it sounds like a separate issue.

01 -  static      ( 'capwap ap controller ip address' || 'previous memory' )
03 -  dhcp server ( DHCP Option-43 )
00 -  broadcast   (works well when AP and WLC are in same subnet)
02 -  OTAP        ( disabled, by default)(not preferred)(can work only when AP has joined to the WLC )
04 -  dns         ( 'cisco-capwap-controller' via DHCP option 15)