974 BigIron RX Series Configuration Guide
53-1002253-01
Configuring 802.1x port security
33
When strict security mode is enabled:
• If the Filter-ID attribute in the Access-Accept message contains a value that does not refer to
an existing filter (that is, a MAC address filter or IP ACL configured on the device), then the
client will not be authenticated, regardless of any other information in the message (for
example, if the Tunnel-Private-Group-ID attribute specifies a VLAN to which to assign the port).
• If the Vendor-Specific attribute specifies the syntax for a filter, but there are insufficient system
resources to implement the filter, then the port will not be authenticated.
• If the device does not have the system resources available to dynamically apply a filter to a
port, then the port will not be authenticated.
If the Access-Accept message contains values for both the Filter-ID and Vendor-Specific
attributes, then the value in the Vendor-Specific attribute (the per-user filter) takes
precedence.
Also, if authentication for a port fails because the Filter-ID attribute referred to a non-existent
filter, or there were insufficient system resources to implement the filter, then a Syslog
message is generated.
When strict security mode is disabled:
• If the Filter-ID attribute in the Access-Accept message contains a value that does not refer to
an existing filter (that is, a MAC address filter or IP ACL configured on the device), then the port
is still authenticated, but no filter is dynamically applied to it.
• If the Vendor-Specific attribute specifies the syntax for a filter, but there are insufficient system
resources to implement the filter, then the port is still authenticated, but the filter specified in
the Vendor-Specific attribute is not applied to the port.
By default, strict security mode is enabled for all 802.1x-enabled interfaces, but you can manually
disable or enable it, either globally or for specific interfaces.
To disable strict security mode globally, enter the following commands.
BigIron RX(config)# dot1x-enable
BigIron RX(config-dot1x)# no global-filter-strict-security
After you have globally disabled strict security mode on the device, you can re-enable it by entering
the following command.
BigIron RX(config-dot1x)# global-filter-strict-security
Syntax: [no] global-filter-strict-security
To disable strict security mode for a specific interface, enter commands such as the following.
BigIron RX(config)# interface e 1
BigIron RX(config-if-e10000-1)# no dot1x filter-strict-security
To re-enable strict security mode for an interface, enter the following command.
BigIron RX(config-if-e10000-1)# dot1x filter-strict-security
Syntax: [no] dot1x filter-strict-security
The output of the show dot1x and show dot1x config commands has been enhanced to indicate
whether strict security mode is enabled or disabled globally and on an interface.
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