Cisco Catalyst 3750-E Series, Руководство по настройке программного обеспечения

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10-37
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 10 Configuring IEEE 802.1x Port-Based Authentication
Configuring 802.1x Authentication
VLAN Assignment, Guest VLAN, Restricted VLAN, and Inaccessible Authentication Bypass
These are the configuration guidelines for VLAN assignment, guest VLAN, restricted VLAN, and
inaccessible authentication bypass:
•
When 802.1x authentication is enabled on a port, you cannot configure a port VLAN that is equal
to a voice VLAN.
•
The 802.1x authentication with VLAN assignment feature is not supported on trunk ports, dynamic
ports, or with dynamic-access port assignment through a VMPS.
•
You can configure 802.1x authentication on a private-VLAN port, but do not configure IEEE 802.1x
authentication with port security, a voice VLAN, a guest VLAN, a restricted VLAN, or a per-user
ACL on private-VLAN ports.
• You can configure any VLAN except an RSPAN VLAN, private VLAN, or a voice VLAN as an
802.1x guest VLAN. The guest VLAN feature is not supported on internal VLANs (routed ports) or
trunk ports; it is supported only on access ports.
•
After you configure a guest VLAN for an 802.1x port to which a DHCP client is connected, you
might need to get a host IP address from a DHCP server. You can change the settings for restarting
the 802.1x authentication process on the switch before the DHCP process on the client times out and
tries to get a host IP address from the DHCP server. Decrease the settings for the 802.1x
authentication process (authentication timer inactivity or
dot1x timeout quiet-period and
authentication timer reauthentication or dot1x timeout tx-period ). The amount to decrease the
settings depends on the connected 802.1x client type.
•
When configuring the inaccessible authentication bypass feature, follow these guidelines:
–
The feature is supported on 802.1x port in single-host mode and multihosts mode.
–
If the client is running Windows XP and the port to which the client is connected is in the
critical-authentication state, Windows XP might report that the interface is not authenticated.
–
If the Windows XP client is configured for DHCP and has an IP address from the DHCP server,
receiving an EAP-Success message on a critical port might not re-initiate the DHCP
configuration process.
– You can configure the inaccessible authentication bypass feature and the restricted VLAN on
an 802.1x port. If the switch tries to re-authenticate a critical port in a restricted VLAN and all
the RADIUS servers are unavailable, switch changes the port state to the critical authentication
state and remains in the restricted VLAN.
–
You can configure the inaccessible bypass feature and port security on the same switch port.
•
You can configure any VLAN except an RSPAN VLAN or a voice VLAN as an 802.1x restricted
VLAN. The restricted VLAN feature is not supported on internal VLANs (routed ports) or trunk
ports; it is supported only on access ports.
MAC Authentication Bypass
These are the MAC authentication bypass configuration guidelines:
•
Unless otherwise stated, the MAC authentication bypass guidelines are the same as the 802.1x
authentication guidelines. For more information, see the
“802.1x Authentication” section on
page 10-35 .
• If you disable MAC authentication bypass from a port after the port has been authorized with its
MAC address, the port state is not affected.