https://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/CBS_250_350/CLI/CLI_CBS_250.pdf
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Page 41-42, Section 3.3 dot1x authentication
Example
The following example enables authentication based on 802.1x and the station’s MAC address
on port gi1:
switchxxxxxx(config)# interface gi1
switchxxxxxx(config-if)# dot1x authentication 802.1x
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On my CBS250-48P-4G, I am trying to configure a port with the command found in the example above and get the following:
switch666#config
switch666(config)#interface gi1
switch666(config-if)#dot1x authentication 802.1x
% Unrecognized command
dot1x + ? yields that the 'authentication' options are missing:
other info:
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switch666#show ver
Active-image: flash://system/images/image_cbs250_ros_3.1.1.7_release_cisco_signed.bin
Version: 3.1.1.7
MD5 Digest: 4805a22186295e82609a0a3e6def88e0
Date: 12-Aug-2021
Time: 15:02:37
Inactive-image: flash://system/images/image1.bin
Version: 3.0.0.69
MD5 Digest: 7520543df10e96a355ec0d1bd5785e39
Date: 27-Aug-2020
Time: 15:58:09
Is not the CB250 capable of 802.1X + MAC Authentication ?