Administrator Guide

Figure 8. Single-Host Authentication Mode
When multiple end users are connected to a single authenticator port, single-host mode authentication does not authenticate all
end users, and all but one are denied access to the network. For these cases, the Dell Networking OS supports multi-host mode
authentication.
Figure 9. Multi-Host Authentication Mode
When you configure multi-host mode authentication, the first client to respond to an identity request is authenticated and
subsequent responses are still ignored. However, because the authenticator expects the possibility of multiple responses, no
system log is generated. After the first supplicant is authenticated, all end users connected to the authorized port are allowed to
access the network.
If the authorized port becomes unauthorized due to re-authentication failure or the supplicant sends an EAPOL logoff frame, all
connected end users are denied access to the network.
802.1X
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