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Port Configuration
87
NXA-ENET24 - Software Management Guide
Configuring Interface Connections
You can use the Port Configuration or Trunk Configuration page to enable/disable an interface, set auto-
negotiation and the interface capabilities to advertise, or manually fix the speed, duplex mode, and flow
control.
Command Attributes
Command Attributes
•Name Allows you to label an interface. (Range: 1-64 characters)
•Admin Allows you to manually disable an interface. You can disable an interface due to abnor-
mal behavior (e.g., excessive collisions), and then re-enable it after the problem has
been resolved. You may also disable an interface for security reasons.
• Speed/Duplex Allows manual selection of port speed and duplex mode (i.e., with auto-negotiation dis-
abled).
•Flow Control Allows automatic or manual selection of flow control.
• 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) - When specified, the port transmits and receives pause frames;
when not specified, the port will auto-negotiate to determine 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
• 100BASE-TX – 10half, 10full, 100half, 100full;
• 1000BASE-T – 10half, 10full, 100half, 100full, 1000full;
• 1000BASE-LX – 1000full)
•Trunk Indicates if a port is a member of a trunk.
To create trunks and select port members, see Creating Trunk Groups section on
page 88.
Autonegotiation must be disabled before you can configure or force the interface to
use the Speed/Duplex Mode or Flow Control options.