Configuring 802.1X; Hp Implementation Of 802.1X; Access Control Methods; Using 802.1X Authentication With Other Features - HP 12500 Series Configuration Manual

Configuring 802.1X

This chapter describes how to configure 802.1X on an HP device.

HP implementation of 802.1X

Access control methods

HP implements port-based access control as defined in the 802.1X protocol, and extends the protocol to
support MAC-based access control.
Port-based access control—Once an 802.1X user passes authentication on a port, any subsequent
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user can access the network through the port without authentication. When the authenticated user
logs off, all other users are logged off.
MAC-based access control—Each user is separately authenticated on a port. When a user logs off,
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no other online users are affected.

Using 802.1X authentication with other features

VLAN assignment
You can configure the authentication server to assign a VLAN for an 802.1X user that has passed
authentication. The way that the network access device handles VLANs on an 802.1X-enabled port
differs by 802.1X access control mode.
Access control
Port-based
MAC-based
With 802.1X authentication, a hybrid port is always assigned to a VLAN as an untagged member. After
the assignment, do not re-configure the port as a tagged member in the VLAN.
On a periodic online user re-authentication enabled port, if a user has been online before you enable the
MAC-based VLAN function, the access device does not create a MAC-to-VLAN mapping for the user
unless the user passes re-authentication and the VLAN for the user has changed.
For more information about VLAN configuration and MAC-based VLAN, see Layer 2—LAN Switching
Configuration Guide.
VLAN manipulation
Assigns the VLAN to the port as the port VLAN (PVID). The authenticated 802.1X user
and all subsequent 802.1X users can access the VLAN without authentication.
When the user logs off, the previous PVID restores, and all other online users are
logged off.
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If the port is a hybrid port with MAC-based VLAN enabled, maps the MAC address
of each user to the VLAN assigned by the authentication server. The PVID of the port
does not change. When a user logs off, the MAC-to-VLAN mapping for the user is
removed.
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If the port is an access, trunk, or MAC-based VLAN disabled hybrid port, assigns
the first authenticated user's VLAN to the port as the PVID. If a different VLAN is
assigned for a subsequent user, the user cannot pass the authentication.
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