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802.1x radius server is down

whanson
Level 2
Level 2

if one is using 802.1x to authenticate on a wired lan what happens if the radius server is unavailable?

1 Reply 1

andy
Level 1
Level 1

It depends on what your aaa statement looks like.

If you have the following:

aaa authentication dot1x default group radius

Authentication will fail completely if radius is down.

If you do something like:

aaa authentication dot1x default group radius none

Authentication will be tried first with radius if it is unavailable, the user is still allowed access because the last entry in your default list was none, referring to don't use any authentication.

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