SMC Networks SMCGS10C-SMART Management Manual page 83

assigned VLAN is enabled for that port. When unchecked, RADIUS-
server assigned VLAN is disabled for all ports.
When RADIUS-Assigned VLAN is both globally enabled and enabled for
a given port, the switch reacts to VLAN ID information carried in the
RADIUS Access-Accept packet transmitted by the RADIUS server when
a supplicant is successfully authenticated. If present and valid, the
port's Port VLAN ID will be changed to this VLAN ID, the port will be set
to be a member of that VLAN ID, and the port will be forced into VLAN-
unaware mode. Once assigned, all traffic arriving on the port will be
classified and switched on the RADIUS-assigned VLAN ID.
If (re-)authentication fails or the RADIUS Access-Accept packet no
longer carries a VLAN ID or it's invalid, or the supplicant is otherwise no
longer present on the port, the port's VLAN ID is immediately reverted
to the original VLAN ID (which may be changed by the administrator in
the meanwhile without affecting the RADIUS-assigned setting).
This option is only available for single-client modes, i.e. port-based
802.1X and Single 802.1X.
For trouble-shooting VLAN assignments, use the Monitor > VLANs >
N :
OTE
VLAN Membership and VLAN Port pages. These pages show which modules
have (temporarily) overridden the current Port VLAN configuration.
RADIUS Attributes Used in Identifying a VLAN ID
RFC 2868 and RFC 3580 form the basis for the attributes used in
identifying a VLAN ID in an Access-Accept packet. The following criteria
are used:
The Tunnel-Medium-Type, Tunnel-Type, and Tunnel-Private-Group-
■
ID attributes must all be present at least once in the Access-Accept
packet.
The switch looks for the first set of these attributes that have the
■
same Tag value and fulfil the following requirements (if Tag == 0 is
used, the Tunnel-Private-Group-ID does not need to include a Tag):
Value of Tunnel-Medium-Type must be set to "IEEE-802" (ordinal
■
6).
Value of Tunnel-Type must be set to "VLAN" (ordinal 13).
■
Value of Tunnel-Private-Group-ID must be a string of ASCII
■
characters in the range 0-9, which is interpreted as a decimal
string representing the VLAN ID. Leading '0's are discarded. The
final value must be in the range 1-4095.
The VLAN list can contain multiple VLAN identifiers in the format
"1u,2t,3u" where "u" indicates an untagged VLAN and "t" a
tagged VLAN.
◆ Guest VLAN Enabled - A Guest VLAN is a special VLAN - typically with
limited network access - on which 802.1X-unaware clients are placed
– 83 –
| Configuring the Switch
C 4
HAPTER
Configuring Security