3Com 1000BASE - Manual (Page 3)

The module requires management software version
2.42 or later to be installed on the Switch. For
instructions on upgrading management software, refer
to the documentation supplied with your Switch.
Support for the management software is supplied by
3Com Transcend
® Network Control Services.
When the module is installed in a suitable Switch, the
Switch interfaces contain features to monitor the
auto-negotiation system specified in the IEEE 802.3
Ethernet standard. This system allows the module port
to automatically detect the flow control setting of a
Gigabit Ethernet link.
The Current Flow Control field in the Web interface
displays the method of flow control currently used by
the module port. If auto-negotiation is not yet
complete,
Not Determined is displayed.
It is not possible to disable the auto-negotiation system
through either the Web or the Command Line Interface.
An error message is displayed if you try to disable
auto-negotiation on the module through the Command
Line Interface.
The module port has restricted functionality — for
details, see “Module Port Restrictions” below. As a
consequence, the Port Setup page for the port does not
contain all the standard listboxes.
When using the module port, note the following:
T The port only operates in full duplex.
T The port only supports full duplex flow control in
symmetrical mode, as defined by the Gigabit
Ethernet standard. You cannot disable or alter this
mode.
T The port only supports the Store and Forward
forwarding mode.
T The port does not support PACE.
T You cannot manage the port using the Internetwork
Packet Exchange protocol (IPX).
T The port cannot be part of a port trunk.
T The port does not support VLT tagging.
T You cannot create a resilient link pair that includes
the port and another port that uses VLT tagging.
T You cannot disable auto-negotiation in the module.
T You can only restart auto-negotiation using SNMP,
and not from the Web interface or from the
Command Line Interface.
For information on other module port restrictions, refer
to the documentation supplied with your Switch.
If you suspect a problem, carry out these steps before
contacting your supplier:
T Ensure that the Switch in which the module is fitted
is turned on.
T Ensure that the module is correctly installed in the
Switch.
T Ensure that the device at the far end of the link is
on and operating correctly.
T Ensure that all connectors on the cable are correctly
engaged.
T Ensure that the cabling installation conforms to the
Category 5 standard. A white paper which describes
this standard is available from the 3Com web site.
For more general problem solving information, refer to
the documentation supplied with your Switch.
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ESTRICTIONS
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