Administrator Guide

Table Of Contents
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 devices 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.
DellEMC(conf-if-te-1/3)# dot1x host-mode multi-auth
DellEMC(conf-if-te-1/3)# do show dot1x interface tengigabitethernet 1/3
802.1x information on Te 1/3:
-----------------------------
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: AUTHORIZED
Untagged VLAN id: 400
Auth PAE State: Authenticated
Backend State: Idle
Port status and State info for Supplicant: 7a:d9:d9:7d:00:01
Port Auth Status: AUTHORIZED
Untagged VLAN id: 400
Auth PAE State: Authenticated
Backend State: Idle
Restricting Multi-Supplicant Authentication
To restrict the number of devices that 802.1X can authenticate on a port in multi-supplicant (multi-auth) mode, enter the
dot1x max-supplicants number command in Interface mode. By default, the maximum number of multi-supplicant
devices is 128.
DellEMC(conf-if-te-2/1)# dot1x max-supplicants 4
100
802.1X