Cabletron Systems 7C03 User Manual page 50

Using the 7C0x SmartSwitch Hub View
If you choose to select a specific mode of operation (rather than auto-negotiation), you
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should be sure that the link partner supports the same mode. Otherwise, no link will be
achieved.
CAUTION
If you select a Full Duplex mode and the link partner supports the same wire speed but not
Full Duplex, a link will be achieved, but it will be unstable and will behave erratically.
If you select Auto-Negotiation, the local node will try to match the mode of the link
partner, even if the link partner is not set to auto-negotiate, and even if the local node
must use a mode which is it is not currently advertising.
Note that if Auto Negotiation is the selected mode, the Current Operational
Mode field will indicate which mode was selected by the link partners.
See Setting the Desired Operational Mode,
Advertised Abilities
For 100Base-TX ports which have been configured to operate in Auto Negotiation
mode, this field allows you to select which of the operational modes available to
the port can be selected by the negotiating link partners. During Auto
Negotiation, each of the link partners will advertise all selected modes in
descending bandwidth order: 100Base-TX Full Duplex, 100Base-TX, 10Base-T Full
Duplex, and 10Base-T. Of the selected abilities, the highest mode mutually
available will automatically be used. If there is no mode mutually advertised, no
link will be achieved.
If you have selected a specific operational mode for your 100Base-TX port, the
Advertised Abilities do not apply; the selected Advertised Abilities also do not
restrict the local node's ability to set up a link with a partner who is not currently
Auto-Negotiating.
Auto-Negotiation is not currently supported for 100Base-FX ports; for these ports, the
Advertised Abilities section will display No Support.
NOTE
Remote Capabilities
When the local node is set to Auto-Negotiation, this field will display the
advertised abilities of the remote link — even if the remote link is not currently set
to auto-negotiate. Possible values for this field are:
•
•
•
•
2-34
100Base-TX Full Duplex
100Base-TX
10Base-T Full Duplex
10Base-T
page 2-35, for more information.
Managing the Hub