The SmartSwitch 2000 Chassis View
2-38 Managing the Hub
100Base-FX ports do not support auto negotiation for bandwidth or flow control
capability, so you must choose between 100Base-FX Half Duplex and 100Base-FX
Full Duplex mode, and set the flow control option. However, you must still be
sure that both link partners are set to the same operational mode, or the link will
be unstable.
For 1000Base-SX/LX/CX ports the speed and duplex modes are always
configured at 1000MB Full Duplex. However, you can select Auto Negotiate
mode, which allows the port to negotiate with its link partner to find the highest
mutually available bandwidth and flow control. If you select Auto Negotiate
mode, you must also choose which of the port’s bandwidth and flow control
capabilities you wish to advertise to the link partner (refer to Auto Negotiation
Technologies, page2-38).
To set your desired operational mode:
1. Click on the Speed, Duplex, or Flow Control list box to display the menu of
available options; click to select the operational mode you wish to set.
2. Click on the Apply button to save your changes.
Auto Negotiation Technologies
For ports which have been configured to operate in Auto Negotiate mode, this list
box allows you to select which of the operational modes available to the port will
be advertised to the negotiating link partner.
During Auto Negotiation, each of the link partners will advertise all selected
modes. Of the selected modes, the highest mode mutually available will
automatically be used. If there is no mode mutually advertised, no link will be
achieved.
If you have manually configured specific ope rat ional modes for your 100Base-TX
port or if you are configuring a 100Base-FX port, the Auto Negotiation
Technologies list box does not apply.
NOTE
If the port you are configuring does not support Flow Control, the Current Mode field w ill
display “not supported” and the Desired Mode list box will be disabled.
TIP
If you select Auto-Negotiation at both ends of a link, be sure at least one
mutually-advertised operational mode is available.