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16
C
1: O
HAPTER
Smart Auto-sensing Feature
Smart auto-sensing only works if it is enabled (it is enabled for the
stack by default) and the device to which the port is connected
supports 10/100 auto-negotiation.
When a 100Mbps connection is made to one of the ports on the
Dual Speed Hub 500, the Smart auto-sensing feature checks the
quality of the connection. If the connection is unsuitable (probably
due to low quality cabling or too many patch panel connections),
Smart auto-sensing will automatically downgrade the port to operate
at 10Mbps. The LED for that port (on the front of the unit) is
changed to reflect the new speed, and a warning trap is sent to the
management station (if traps have been configured).
If you subsequently repair a faulty link that has been downgraded by
Smart auto-sensing, the feature will automatically recheck the
connection as soon as the link is made.
When the management module is used with Dual Speed Hub 500
units running management agent software version 1.11 or later, the
Smart auto-sensing feature can be managed for the stack.
You may disable the Smart auto-sensing feature for the entire stack.
For information on doing this using the web interface, refer to
"Smart Auto-sensing"
particular port to either 10Mbps or 100Mbps while allowing other
ports to engage in Smart auto-sensing, refer to
page
Management of the Dual Speed Hub 500
The management module can be fitted into either of the two
transceiver module slots in the Dual Speed Hub 500, and provides
management for the whole stack.
Currently the management module can be used with these units:
3C16610 — SuperStack II Dual Speed Hub 500 12-port
3C16611 — SuperStack II Dual Speed Hub 500 24-port
Contact your supplier for information about any other units that the
management module may be used with. For information on how to
use the Dual Speed Hub 500, refer to the documentation that
accompanies the hub.
I
VERVIEW AND
NSTALLATION OF THE
86.
M
ANAGEMENT
on
page
98. Alternatively, you can fix a
M
ODULE
"Port Setup"
on
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