Allied Telesis AT-S97 - Manual (Page 85)

AT-S85 and AT-S97 Management Software User’s Guide
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As with the other two channel operating modes, this mode does not
interfere with the flow of network traffic through the ports of a channel and
so can be used during normal network operations of a media converter
channel. However, you might want to limit its use to diagnosing a link
failure, particularly if the network devices connected to the ports are
managed devices. This is because the pulsing of the transmitter on a port
and the constantly changing status of a link could prove problematic for
some managed devices. For example, the device might send a constant
stream of SNMP traps or, if the device is running a spanning tree protocol,
the protocol may become confused as the status of the device’s link to the
media converter constantly changes.
Mode Select Button
On the front panel of the media converter module is a Mode Select button
that you can use to manually set the operating mode of a channel. Turning
the button up or down toggles through the channels on the module and
pressing it selects a channel’s operating mode. The selected channel is
identified by the CH LEDs on the module and the operating mode by the
LT (Link Test), ML (MissingLink), and SML (Smart MissingLink) LEDs. For
further information, refer to the AT-MCF2000 Multi-channel Media
Converter Series Installation Guide.
A media converter module automatically updates its auxiliary configuration
file in its file system whenever you set a channel’s operating mode with the
Mode Select button. This enables a module in an unmanaged chassis to
retain its channel operating mode settings even when it is moved to
another slot or when a chassis is power cycled.
However, if a chassis has the AT-MCF2000M Management Module or is
part of a stack, the master configuration file on the management module is
not automatically updated when a channel’s operating mode is set with the
Mode Select button. Rather, you must initiate the update with the CONFIG
SAVE command from a local or remote management session. Otherwise,
the settings in the auxiliary configuration file on the module are overwritten
by the master configuration file on the management module the next time
the module or chassis is reset.
For further information on configuration files, refer to Chapter 8,
“Configuration File Commands” on page 145.
Operating Mode Guidelines
The following guidelines apply to using the channel operating modes:
ˆ The channels on a media converter module can be set to different
operating modes.
ˆ The operating modes do not block or interfere with the flow of traffic
between the two ports of a channel during normal network operations.