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Configuring MAC RADIUS Authentication on MX Series Routers in Enhanced LAN Mode

Starting with Junos OS Release 14.2, you can permit devices that are not 802.1X-enabled LAN access by configuring MAC RADIUS authentication on the MX Series router interfaces to which the hosts are connected.

Note:

You can also allow non-802.1X-enabled devices to access the LAN by configuring their MAC address for static MAC bypass of authentication.

You can configure MAC RADIUS authentication on an interface that also allows 802.1X authentication, or you can configure either authentication method alone.

If both MAC RADIUS and 802.1X authentication are enabled on the interface, the router first sends the host three EAPOL requests to the host. If there is no response from the host, the router sends the host’s MAC address to the RADIUS server to check whether it is a permitted MAC address. If the MAC address is configured as permitted on the RADIUS server, the RADIUS server sends a message to the router that the MAC address is a permitted address, and the router opens LAN access to the nonresponsive host on the interface to which it is connected.

If MAC RADIUS authentication is configured on the interface but 802.1X authentication is not (by using the mac-radius restrict option), the router attempts to authenticate the MAC address with the RADIUS server without delaying by attempting 802.1X authentication first.

Before you configure MAC RADIUS authentication, be sure you have:

  • Configured basic access between the MX Series router and the RADIUS server.

  • Configured MX240, MX480, and MX960 routers to function in enhanced LAN mode by entering the network-services lan statement at the [edit chassis] hierarchy level.

To configure MAC RADIUS authentication using the CLI:

  • On the router, configure the interfaces to which the nonresponsive hosts are attached for MAC RADIUS authentication, and add the restrict qualifier for interface ge-0/0/20 to have it use only MAC RADIUS authentication:

  • On a RADIUS authentication server, create user profiles for each nonresponsive host using the MAC address (without colons) of the nonresponsive host as the username and password (here, the MAC addresses are 00:04:0f:fd:ac:fe and 00:04:ae:cd:23:5f):

Release History Table
Release
Description
14.2
Starting with Junos OS Release 14.2, you can permit devices that are not 802.1X-enabled LAN access by configuring MAC RADIUS authentication on the MX Series router interfaces to which the hosts are connected.