xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch User Manual
Figure 6- 91. The Client
Authentication Process
Utilizing the three roles stated above, the 802.1x protocol provides a stable and secure way of authorizing and authenticating users
attempting to access the network. Only EAPOL traffic is allowed to pass through the specified port before a successful
authentication is made. This port is “locked” until the point when a Client with the correct username and password (and MAC
address if 802.1x is enabled by MAC address) is granted access and therefore successfully “unlocks” the port. Once unlocked,
normal traffic is allowed to pass through the port. The following figure displays a more detailed explanation of how the
authentication process is completed between the three roles stated above.
Figure 6- 92. The 802.1x Authentication Process
The D-Link implementation of 802.1x allows network administrators to choose between two types of Access Control used on the
Switch, which are:
1. Port-Based Access Control – This method requires only one user to be authenticated per port by a remote RADIUS server
to allow the remaining users on the same port access to the network.
2. MAC-Based Access Control – Using this method, the Switch will automatically learn up to sixteen MAC addresses by
port and set them in a list. Each MAC address must be authenticated by the Switch using a remote RADIUS server before
being allowed access to the Network.
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