Understanding 802.1X And Vsas On Ex Series Switches - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos

Understanding 802.1X and VSAs on EX Series Switches

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2544
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OS for EX Series Ethernet Switches, Release 10.3
Juniper Networks EX Series Ethernet Switches support the configuration of RADIUS server
attributes specific to Juniper Networks. These attributes are known as vendor-specific
attributes (VSAs) and are described in RFC 2138, Remote Authentication Dial In User
Service (RADIUS). Through VSAs, you can configure port-filtering attributes on the RADIUS
server. VSAs are clear text fields sent from the RADIUS server to the switch as a result
of the 802.1X authentication success or failure. The 802.1X authentication prevents
unauthorized user access by blocking a supplicant at the port until the supplicant is
authenticated by the RADIUS server. The VSA attributes are interpreted by the switch
during authentication, and the switch takes appropriate actions. Implementing
port-filtering attributes with 802.1X authentication on the RADIUS server provides a
central location for controlling LAN access for supplicants.
These port-filtering attributes specific to Juniper Networks are encapsulated in a RADIUS
server VSA with the vendor ID set to the Juniper Networks ID number, 2636.
As well as configuring port-filtering attributes through VSAs, you can apply a port firewall
filter that has already been configured on the switch directly to the RADIUS server. Like
port-filtering attributes, the filter is applied during the 802.1X authentication process,
and its actions are applied at the switch port. Adding a port firewall filter to a RADIUS
server eliminates the need to add the filter to multiple ports and switches. For more
information, see "Example: Applying a Firewall Filter to 802.1X-Authenticated Supplicants
Using RADIUS Server Attributes on an EX Series Switch" on page 2574.
VSAs are only supported for 802.1X single-supplicant configurations and
multiple-supplicant configurations.
Understanding Authentication on EX Series Switches on page 2526
Example: Setting Up 802.1X for Single Supplicant or Multiple Supplicant Configurations
on an EX Series Switch on page 2568
Filtering 802.1X Supplicants Using RADIUS Server Attributes on page 2618
Configuring Firewall Filters (CLI Procedure) on page 3063
VSA Match Conditions and Actions for EX Series Switches on page 2626
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