Cisco Catalyst 2960 Series, Configuration Manual

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3 When the user launches a web browser, the device intercepts the HTTP traffic and redirects the browser
to the Cisco ISE central web authentication (CWA) guest web portal URL; the user-requested URL is
extracted and appended to the Cisco ISE guest URL.
4
When the user is authenticated, the Cisco ISE sends the Device Registration page to the user. The user
enters the required information, and the page is returned to the Cisco ISE. The Cisco ISE downloads user
profiles and redirects the user to the originally requested URL: www.google.com.
Web-based Authentication Interactions with Other Features
802.1x Authentication
These are the 802.1x authentication configuration guidelines:
• When 802.1x authentication is enabled, ports are authenticated before any other Layer 2 or Layer 3
features are enabled.
• If the VLAN to which an 802.1x-enabled port is assigned changes, this change is transparent and does
not affect the switch. For example, this change occurs if a port is assigned to a RADIUS server-assigned
VLAN and is then assigned to a different VLAN after re-authentication.
If the VLAN to which an 802.1x port is assigned to shut down, disabled, or removed, the port becomes
unauthorized. For example, the port is unauthorized after the access VLAN to which a port is assigned
shuts down or is removed.
• The 802.1x protocol is supported on Layer 2 static-access ports, voice VLAN ports, and Layer 3 routed
ports, but it is not supported on these port types:
◦ Dynamic ports — A port in dynamic mode can negotiate with its neighbor to become a trunk port.
If you try to enable 802.1x authentication on a dynamic port, an error message appears, and 802.1x
authentication is not enabled. If you try to change the mode of an 802.1x-enabled port to dynamic,
an error message appears, and the port mode is not changed.
◦
Dynamic-access ports
—
If you try to enable 802.1x authentication on a dynamic-access (VLAN
Query Protocol [VQP]) port, an error message appears, and 802.1x authentication is not enabled.
If you try to change an 802.1x-enabled port to dynamic VLAN assignment, an error message
appears, and the VLAN configuration is not changed.
◦
EtherChannel port
—
Do not configure a port that is an active or a not-yet-active member of an
EtherChannel as an 802.1x port. If you try to enable 802.1x authentication on an EtherChannel
port, an error message appears, and 802.1x authentication is not enabled.
◦ Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN) destination ports — You can enable
802.1x authentication on a port that is a SPAN or RSPAN destination port. However, 802.1x
authentication is disabled until the port is removed as a SPAN or RSPAN destination port. You
can enable 802.1x authentication on a SPAN or RSPAN source port.
• Before globally enabling 802.1x authentication on a switch by entering the
dot1x system-auth-control
global configuration command, remove the EtherChannel configuration from the interfaces on which
802.1x authentication and EtherChannel are configured.
• Cisco IOS Release 12.2(55)SE and later supports filtering of system messages related to 802.1x
authentication.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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Information About Web-Based Authentication