Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 102
Multi-Supplicant Authentication
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Multi-Supplicant Authentication 802.1X multi-supplicant authentication enables multiple devices on a single authenticator port to access the network by authenticating each device. In addition, multi-supplicant authentication uses dynamic MAC-based VLAN assignment to place devices on different VLANs. This feature is different from multi-host authentication in which multiple devices connected to a single authenticator port can access the network after only the one device is authenticated, and all hosts are placed in the same VLAN as the authenticated device. Multi-supplicant authentication is needed, for example, in the case of a workstation at which a VoIP phone and PC are connected to a single authenticator port. Multi-host authentication could authenticate the first device to respond, and then both devices could access the network. However, if you wanted to place them in different VLANs - a VoIP VLAN and a data VLAN - you would need to authenticate the devices separately so that the RADIUS server can send each device's VLAN assignment during that devices authentication process. During the authentication process, the switch is able to learn the MAC address of the device though the EAPoL frames, and the VLAN assignment from the RADIUS server. With this information it creates an authorized-MAC-to-VLAN mapping table per port. Then, the system can tag all incoming untagged frames with the appropriate VLAN-ID based on the table entries. Configuring Multi-Supplicant Authentication To enable multi-supplicant authentication on a port, enter the dot1x host-mode multi-auth command in Interface mode. To return to the default single-host authentication mode, enter the no dot1x host-mode command. To verify the currently configured authentication mode, enter the show dot1x interface command. Dell(conf-if-te-1/3)# dot1x host-mode multi-auth Dell(conf-if-te-1/3)# do show dot1x interface tengigabitethernet 0103 802.1x information on Te 0/0: Dot1x Status: Enable Port Control: AUTO Re-Authentication: Disable Guest VLAN: Disable Guest VLAN id: NONE Auth-Fail VLAN: Disable Auth-Fail VLAN id: NONE Auth-Fail Max-Attempts: NONE Critical VLAN: Disable Critical VLAN id: NONE Mac-Auth-Bypass: Disable Mac-Auth-Bypass Only: Disable Static-MAB: Disable Static-MAB Profile: NONE Tx Period: 30 seconds Quiet Period: 60 seconds ReAuth Max: 2 Supplicant Timeout: 30 seconds Server Timeout: 30 seconds Re-Auth Interval: 3600 seconds Max-EAP-Req: 2 Host Mode: MULTI_AUTH Max-Supplicants: 128 Port status and State info for Supplicant: 7a:d9:d9:7d:00:00 Port Auth Status: Untagged VLAN id: Auth PAE State: Backend State: AUTHORIZED 400 Authenticated Idle Port status and State info for Supplicant: 7a:d9:d9:7d:00:01 Port Auth Status: AUTHORIZED 802.1X 102
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