Installation manual

3-131
SIGNAMAX LLC • www.signamax.eu
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 abnormal behavior (e.g., excessive collisions), and then reenable it after the problem
has been resolved. You may also disable an interface for security reasons.
• Speed/Duplex – Allows you to manually set the port speed and duplex mode. (i.e., with
auto-negotiation disabled)
• Flow Control – Allows automatic or manual selection of flow control (that is, with
auto-negotiation disabled).
• 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 (Gigabit only) - 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 - 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 802.3-2005 (formally
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, 100full, 1000full; 1000BASE-SX/
LX/LH – 1000full)
• Media Type – Configures the forced/preferred port type to use for the combination ports.
(
Ports 25-28)
- Copper-Forced - Always uses the built-in RJ-45 port.
-
SFP-Forced - Always uses the SFP port (even if module is not installed).
-
SFP-Preferred-Auto - Uses SFP port if both combination types are functioning and
the SFP port has a valid link. (This is the default.)
• Trunk – Indicates if a port is a member of a trunk. To create trunks and select port
members, see “Creating Trunk Groups” on page 3-132.