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200-Series: Mac radius bypass auth not working against NAC with MAB

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Title200-Series: Mac radius bypass auth not working against NAC with MAB
Symptoms
Environment
200 Series switches running version 1.5.2.12 or below

Client switchport configured as follows:
interface 1/0/6
authentication order dot1x mab
authentication priority dot1x mab
dot1x port-control mac-based
dot1x mac-auth-bypass
voice vlan 132
switchport mode access
switchport access vlan 682
exit

 
Cause
This is a firmware defect, tracked in fst0000285.
Resolution
Either upgrade to a version of code where fst0000285 is fixed, or use the following client switchport configuration as a workaround:
 
Change to—
interface 1/0/6
authentication order dot1x mab
authentication priority dot1x mab
dot1x port-control mac-based
dot1x mac-auth-bypass
voice vlan 132
vlan pvid 682
vlan participation include 682
exit

 
Additional notes

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