Chapter 8
| Authentication Commands
802.1X Port Authentication
– 247 –
dot1x
operation-mode
This command allows hosts (clients) to connect to an 802.1X-authorized port. Use
the
no
form with no keywords to restore the default to single host. Use the
no
form
with the
multi-host max-count
keywords to restore the default maximum count.
Syntax
dot1x operation-mode
{
single-host
|
multi-host
[
max-count
count] |
mac-
based-auth
}
no dot1x operation-mode
[
multi-host max-count
]
single-host
– Allows only a single host to connect to this port.
multi-host
– Allows multiple host to connect to this port.
max-count
– Keyword for the maximum number of hosts.
count – The maximum number of hosts that can connect to a port.
(Range: 1-1024; Default: 5)
mac-based
– Allows multiple hosts to connect to this port, with each host
needing to be authenticated.
Default
Single-host
Command Mode
Interface Configuration
Command Usage
◆
The “max-count” parameter specified by this command is only effective if the
dot1x mode is set to “auto” by the dot1x port-control command.
◆
In “multi-host” mode, only one host connected to a port needs to pass
authentication for all other hosts to be granted network access. Similarly, a port
can become unauthorized for all hosts if one attached host fails re-
authentication or sends an EAPOL logoff message.
◆
In “mac-based-auth” mode, each host connected to a port needs to pass
authentication. The number of hosts allowed access to a port operating in this
mode is limited only by the available space in the secure address table (i.e., up
to 1024 addresses).
Example
Console(config)#interface eth 1/2
Console(config-if)#dot1x operation-mode multi-host max-count 10
Console(config-if)#
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