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Port Configuration
3-43
• Autonegotiation (Port Capabilities) – Allows auto-negotiation to be enabled/
disabled. When auto-negotiation is enabled, you need to specify the capabilities
to be advertised. When auto-negotiation is disabled, you can force the settings
for speed, mode, and flow control.The following capabilities are supported.
- 10half - Supports 10 Mbps half-duplex operation
- 10full - Supports 10 Mbps full-duplex operation
- 100half - Supports 100 Mbps half-duplex operation
- 100full - Supports 100 Mbps full-duplex operation
- 1000full - Supports 1000 Mbps full-duplex operation
- Sym (Gigabit only) - Check this item to transmit and receive pause frames, or
clear it to auto-negotiate the sender and receiver for asymmetric pause
frames. (The current switch chip only supports symmetric pause frames.)
- FC - Supports flow control
Flow control can eliminate frame loss by “blocking” traffic from end stations or
segments connected directly to the switch when its buffers fill. When enabled,
back pressure is used for half-duplex operation and IEEE 802.3x for
full-duplex operation. (Avoid using flow control on a port connected to a hub
unless it is actually required to solve a problem. Otherwise back pressure
jamming signals may degrade overall performance for the segment attached
to the hub.)
(Default: Autonegotiation enabled; Advertised capabilities for 1000BASE-T –
10half, 10full, 100half, 100full, 1000full; 1000BASE-SX/LX/LH – 1000full;
100BASE-TX – 100full)
•
Trunk – Indicates if a port is a member of a trunk. To create trunks and select
port members, see “Creating Trunk Groups” on page 3-44.
Note: Auto-negotiation must be disabled before you can configure or force the interface
to use the Speed/Duplex Mode or Flow Control options.
Web – Click Port, Port Configuration or Trunk Configuration. Modify the required
interface settings, and click Apply.