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EAPOL Start frame retransmission rate.
Single 802.1X
In port-based 802.1X authentication, once a supplicant is successfully
authenticated on a port, the whole port is opened for network traffic. This allows
other clients connected to the port (for instance through a hub) to piggy-back on
the successfully authenticated client and get network access even though they
really aren't authenticated. To overcome this security breach, use the Single
802.1X variant.
Single 802.1X is really not an IEEE standard, but features many of the same
characteristics as does port-based 802.1X. In Single 802.1X, at most one
supplicant can get authenticated on the port at a time. Normal EAPOL frames are
used in the communication between the supplicant and the switch. If more than
one supplicant is connected to a port, the one that comes first when the port's link
comes up will be the first one considered. If that supplicant doesn't provide valid
credentials within a certain amount of time, another supplicant will get a chance.
Once a supplicant is successfully authenticated, only that supplicant will be
allowed access. This is the most secure of all the supported modes. In this mode,
the Port Security module is used to secure a supplicant's MAC address once
successfully authenticated.
Multi 802.1X
Multi 802.1X is - like Single 802.1X - not an IEEE standard, but a variant that
features many of the same characteristics. In Multi 802.1X, one or more
supplicants can get authenticated on the same port at the same time. Each
supplicant is authenticated individually and secured in the MAC table using the
Port Security module.
In Multi 802.1X it is not possible to use the multicast BPDU MAC address as
destination MAC address for EAPOL frames sent from the switch towards the
supplicant, since that would cause all supplicants attached to the port to reply to
requests sent from the switch. Instead, the switch uses the supplicant's MAC
address, which is obtained from the first EAPOL Start or EAPOL Response
Identity frame sent by the supplicant. An exception to this is when no supplicants
are attached. In this case, the switch sends EAPOL Request Identity frames
using the BPDU multicast MAC address as destination - to wake up any
Summary of Contents for NS3702-24P-4S
Page 1: ...NS3702 24P 4S User Manual P N 1072832 REV 00 01 ISS 14JUL14 ...
Page 102: ...102 Figure 4 5 4 LACP Port Configuration Page Screenshot ...
Page 119: ...119 Figure 4 6 4 VLAN Membership Status for Static User Page Screenshot ...
Page 124: ...124 Figure 4 6 6 Private VLAN Membership Configuration page screenshot ...
Page 140: ...140 Figure 4 6 21 Group Name to VLAN Mapping Table Page Screenshot ...
Page 164: ...164 Figure 4 8 2 Multicast Flooding ...
Page 184: ...184 Figure 4 8 15 MLD Snooping Port Group Filtering Configuration Page Screenshot ...
Page 204: ...204 Figure 4 9 6 QoS Egress Port Tag Remarking Page Screenshot ...
Page 209: ...209 QoS Class QoS Class value can be any of 0 7 DPL Drop Precedence Level 0 1 ...
Page 251: ...251 Figure 4 11 3 Authentication Method Configuration Page Screenshot ...
Page 286: ...286 Figure 4 11 11 RADIUS Server Configuration Screenshot ...
Page 290: ...290 Figure 4 11 17 Add User Properties Screen Figure 4 11 18 Add User Properties Screen ...
Page 298: ...298 non committed changes will be lost ...
Page 349: ...349 Figure 4 16 2 PoE Configuration Screenshot ...