Wireless Radius Authentication - Client can't connect to wireless network.

So the masses are just screaming. They can't connect to the wireless SSID.

Gather the client's MAC from their wireless network connection:

CMD: (In windows command prompt)  - ip config - scroll to wireless connection



To begin its time to debug!

CMD : debug client <MAC ID>

 Example : debug client 11:22:33:44:55:66 



After a debug we can see the clients' authentication or errors based on the MAC addressed defined.

Below is a debug of the client having issues:



Authentication has exceeded its maximum attempts. This leads me to check into the radius server before changing any settings for attempts or timing values ( which can be a problem as well ). 

Low and behold the radius server had an expired authentication certificate. 

Comments

Post a Comment

Popular posts from this blog

HULC LED PROCESS - 3750 High CPU

Image
If you're looking at a switch and you see the HULC LED Process running high. The HULC LED process does some of the following tasks: 1. Check link status on every port 2. If the switch supports POE, it checks to see if there is a power device 3. Transceiver checks 4. Fan status updates 5. Set LED ports 6. Check on temperature status Overall the HULC LED Process is a monitoring process running. During looking into this I turned off all non-used ports since it checks the link status. Then I made sure the environment was good. Two Cisco Bugs: http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsi78581 http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtn42790
Read more

%PLATFORM_UCAST-4-PREFIX: --------- TCAM 3750 Switch

Image
 %PLATFORM_UCAST-4-PREFIX:  One or more, more specific prefixes could not be programmed into TCAM and are being covered by a less specific prefix, and the packets may be software forwarded So what is TCAM ? Ternary Content Addressable Memory is used in multi-layer switching also know as Layer 3 switching. The switches forward the packets and frames at the speed of the line by using ASIC hardware. Normally switches make there forwarding decisions based on Layer 2. TCAM is used for Layer 3 components and other features such as QOS and ACES ( Access List ).  Check TCAM and usage of templates being used in the device.  show sdm prefer ? ! This will show us the templates that can be used in the device to give more resources to one feature or the other. For example the default is the equal resource distribution while the routing gives more resources to Layer 3 routing. show sdm prefer ! The command without the "?" will show us what we are currently r
Read more