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Cisco 1941W

Matt Wilson
Beginner
Beginner

I have a 1941 with the security licence. I also bought a 1941W cheaply off eBay. It only had a base licence. I tried swapping the wireless module from the 1941W to the 1941. The 1941 would not recognise it and threw up errors. Both have the latest IOS and bootrom. Any ideas as to why the 1941 would not recognse the wireless module?

 

Cheers, Matt.

1 Accepted Solution

Accepted Solutions

I doubt that that will work.  The PID is burned into the router and adding the module won't change the PID.  I expect that IOS will only activate the wireless module in a W router with the wireless PID.  That's probably intentional because of regulatory implications for the products.  In any event I'd expect to see something in the logs when it boots up.

------------------------------
TAC recommended codes for AireOS WLC's   and   TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's   and   Best Practices for 9800 WLC's
Cisco Wireless compatibility matrix
Field Notice: FN-63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN-72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN-72524 - During Software Upgrade/Downgrade IOS APs Might Remain in Downloading State
     after 4 Dec 2022 Due to Certificate Expiration - Fixed in 8.10.185.3 and latest 9800 IOS-XE releases
     also fixed in 8.5.182.11 (8.5 mainline) and 8.5.182.108 (8.5 IRCM) if you can't upgrade to 8.10
     TAC confirmed that Mobility Express AP TFTP download is not affected so ME 8.5.182.0 still works but see FN-74035 below
Field Notice: FN-70479 Out-Of-The-Box AP Fails to Join WLC or Joins with Single Radio due to Country Mismatch - RMA required
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN-74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
     fixed in 8.10.185.3 and see the field notice for 8.5, Mobility Express and other fixed releases
Check your WLC config with Wireless Config Analyzer using "show tech wireless" output (9800) or "config paging disable" then "show run-config" output (AireOS) and use Wireless Debug Analyzer to analyze your WLC client debugs
Leo Laohoo's list of bugs affecting 2800/3800/4800/1560 APs

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4 Replies 4

 I do not believe that way it works - I never tried it, if that is the case why cisco produce 1941 and 1941W ? 

 

Note : both are end of Life now.

 

BB

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Matt Wilson
Beginner
Beginner

I might add that when swapped back both routers worked flawlessly.

I doubt that that will work.  The PID is burned into the router and adding the module won't change the PID.  I expect that IOS will only activate the wireless module in a W router with the wireless PID.  That's probably intentional because of regulatory implications for the products.  In any event I'd expect to see something in the logs when it boots up.

------------------------------
TAC recommended codes for AireOS WLC's   and   TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's   and   Best Practices for 9800 WLC's
Cisco Wireless compatibility matrix
Field Notice: FN-63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN-72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN-72524 - During Software Upgrade/Downgrade IOS APs Might Remain in Downloading State
     after 4 Dec 2022 Due to Certificate Expiration - Fixed in 8.10.185.3 and latest 9800 IOS-XE releases
     also fixed in 8.5.182.11 (8.5 mainline) and 8.5.182.108 (8.5 IRCM) if you can't upgrade to 8.10
     TAC confirmed that Mobility Express AP TFTP download is not affected so ME 8.5.182.0 still works but see FN-74035 below
Field Notice: FN-70479 Out-Of-The-Box AP Fails to Join WLC or Joins with Single Radio due to Country Mismatch - RMA required
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN-74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
     fixed in 8.10.185.3 and see the field notice for 8.5, Mobility Express and other fixed releases
Check your WLC config with Wireless Config Analyzer using "show tech wireless" output (9800) or "config paging disable" then "show run-config" output (AireOS) and use Wireless Debug Analyzer to analyze your WLC client debugs
Leo Laohoo's list of bugs affecting 2800/3800/4800/1560 APs

That makes sense. Thanks for your help.

 

Matt.

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