Guest Vlan - D-Link DES-3528 User Manual

xStack DES-3528 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual

Guest VLAN

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 lack of the proper 802.1x software or incompatible
devices, such as computers running Windows 98 or lowe
operating systems, or the need for guests to gain access to the
network without full authorization. To supplement these
circumstances, this switch now implements 802.1x Guest
VLANs. These VLANs should have limited access rights and
features separate from other VLANs on the network.
To implement 802.1x Guest 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. Guest VLANs are only supported for port-based VLANs. MAC-based VLANs cannot undergo this procedure.
2. Ports supporting Guest VLANs cannot be GVRP enabled and vice versa.
3. A port cannot be a member of a Guest VLAN and a static VLAN simultaneously.
4. Once a client has been accepted into the target VLAN, it can no longer access the Guest VLAN.
5. If a port is a member of multiple VLANs, it cannot become a member of the Guest VLAN.
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Figure 9- 27. Guest VLAN Authentication Process
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