Table of Contents
Advertisement
EAPOL Timeout
Age Period
Hold Time
Port Configuration
Port
Admin State
Determines the time the switch shall wait for the supplicant response before
retransmitting a packet.
Valid values: 1 ~ 255 seconds (This has no effect for MAC-based ports.)
This setting applies to ports running MAC-based authentication, only.
Suppose a client is connected to a 3
to a port on this switch that runs MAC-based authentication, and suppose the client
gets successfully authenticated. Now assume that the client powers down his PC.
What should make the switch forget about the authenticated client? Re-authentication
will not solve this problem, since this doesn't require the client to be present, as
discussed under
Reauthentication Enabled
authenticated clients. The Age Period, which can be set to a number between 10 and
1000000 seconds, works like this: A timer is started when the client gets
authenticated. After half the age period, the switch starts looking for frames sent by
the client. If another half age period elapses and no frames are seen, the client is
considered removed from the system, and it will have to authenticate again the next
time a frame is seen from it. If, on the other hand, the client transmits a frame before
the second half of the age period expires, the switch will consider the client alive, and
leave it authenticated. Therefore, an age period of T will require the client to send
frames more frequent than T/2 for him to stay authenticated.
This setting applies to ports running MAC-based authentication, only.
If the RADIUS server denies a client access, or a RADIUS server request times out
(according to the timeout specified on the Authentication configuration page), the
client is put on hold in the "Unauthorized" state. In this state, frames from the client
will not cause the switch to attempt to re-authenticate the client. The Hold Time,
which can be set to a number between 10 ~ 1000000 seconds, determines the time
after an EAP Failure indication or RADIUS timeout that a client is not allowed
access.
Description
The port number for which the configuration below applies.
Sets the authentication mode to one of the following options (only used when 802.1X
or MAC-based authentication is globally enabled):
Auto: Requires an 802.1X-aware client (supplicant) to be authorized by the
authentication server. Clients that are not 802.1X-aware will be denied access.
Authorized: Forces the port to grant access to all clients, 802.1X-aware or not. The
switch transmits an EAPOL Success frame when the port links up.
Unauthorized: Forces the port to deny access to all clients, 802.1X-aware or not. The
rd
party switch or hub, which in turn is connected
above. The solution is aging of
-31-
Advertisement
Table of Contents
