R2511-HP MSR Router Series Security Configuration Guide(V5)

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Configuring 802.1X
This chapter describes how to configure 802.1X on an HP device. You can also configure the port security
feature to perform 802.1X. Port security combines and extends 802.1X and MAC authentication. It
applies to a network, a WLAN, for example, that requires different authentication methods for different
users on a port. Port security is beyond the scope of this chapter. For more information about port security,
see "Configuring port security."
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
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,
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 VLAN mani
p
ulation
Port-based
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.
MAC-based
If the port is an access, trunk, or hybrid port, assigns the first authenticated user's VLAN
to the port as the PVID. If a different VLAN is assigned to a subsequent user, the user
cannot pass the authentication. To avoid the authentication failure of subsequent users,
be sure to assign the same VLAN to all 802.1X users on these ports.
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.
For more information about VLAN configuration, see Layer 2—LAN Switching Configuration Guide.
Guest VLAN
Guest VLAN is not supported on ports that perform MAC-based access control.