Does a Portal Authentication User Need to Obtain an IP Address Before Passing Authentication?

3

Yes.
In 802.1x authentication and MAC address authentication, a user is authenticated and then obtains an IP address after passing the authentication. In Portal authentication, the user first obtains an IP address and then is authenticated.

Other related questions:
Can a switch's IP address and a user's IP and MAC addresses be carried when a Portal authentication page is pushed on an S series switch
When a Portal authentication page is pushed on an S series switch, a switch's IP address and a user's IP and MAC addresses cannot be carried.

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