xStack
®
DGS-3426G Layer 2 Gigabit Ethernet Managed Switch
Guest VLANs
On 802.1X security enabled networks, there is a need for non
802.1X supported devices to gain limited access to the network,
due to the lack of the proper 802.1X software or incompatible
devices, such as computers running Windows 98 or lower
operating systems, or the need for guests to gain access to the
network without full authorization or local authentication on the
Switch. To supplement these circumstances, this switch now
implements Guest 802.1X VLANs. These VLANs should have
limited access rights and features separate from other VLANs on
the network.
Figure 6 - 18 Guest VLAN Authentication Process
To implement Guest 802.1X VLANs, the user must first create a
VLAN on the network with limited rights and then enable it as an
802.1X guest VLAN. Then the administrator must configure the
guest accounts accessing the Switch to be placed in a Guest
VLAN when trying to access the Switch. Upon initial entry to the
Switch, the client wishing services on the Switch will need to be
authenticated by a remote RADIUS Server or local authentication
on the Switch to be placed in a fully operational VLAN. If
authenticated and the authenticator posseses the VLAN
placement information, that client will be accepted into the fully
operational target VLAN and normal switch functions will be
open to the client. If the authenticator does not have target VLAN
placement information, the client will be returned to its
originating VLAN. Yet, if the client is denied authentication by
the authenticator, it will be placed in the Guest VLAN where it
has limited rights and access. The adjacent figure should give the
user a better understanding of the Guest VLAN process.
Limitations Using the Guest VLAN
1. Ports supporting Guest VLANs cannot be GVRP enabled and vice versa.
2. A port cannot be a member of a Guest VLAN and a static VLAN simultaneously.
3. Once a client has been accepted into the target VLAN, it can no longer access the Guest VLAN.
Configure 802.1X Guest VLAN
This window is used to configure the 802.1X Guest VLAN on the Switch. Remember, to set a Guest 802.1X VLAN, the user must
first configure a normal VLAN which can be enabled here for Guest VLAN status.
To view this window, click, Security > 802.1x > Configure 802.1x Guest VLAN, as shown below:
Figure 6 - 19 Configure 802.1X Guest VLAN window
The following fields may be modified to enable the guest 802.1X VLAN:
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