Brocade Communications Systems Brocate Ethernet Access Switch 6910 User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Port Configuration
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Command Usage
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Auto-negotiation must be disabled before you can configure or force an RJ-45 interface to use
the Speed/Duplex mode or Flow Control options.
•
When using auto-negotiation, the optimal settings will be negotiated between the link partners
based on their advertised capabilities. To set the speed, duplex mode, or flow control under
auto-negotiation, the required operation modes must be specified in the capabilities list for an
interface.
•
The 1000BASE-T standard does not support forced mode. Auto-negotiation should always be
used to establish a connection over any 1000BASE-T port or trunk. If not used, the success of
the link process cannot be guaranteed when connecting to other types of switches.
•
The Speed/Duplex mode is fixed at 1000full on the Gigabit SFP ports. When auto-negotiation
is enabled, the only attributes which can be advertised include flow control and symmetric
pause frames.
Parameters
These parameters are displayed:
•
Port – Port identifier.
•
Type – Indicates the port type. (1000Base-T, 100Base SFP, 1000Base SFP)
•
Name – Allows you to label an interface. (Range: 1-64 characters)
•
Admin – Shows the administrative status of an interface. (Default: Enabled)
•
Media Type – Configures the forced/preferred port type to use for the combination ports.
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Copper-Forced - Always uses the built-in RJ-45 port.
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SFP-Forced - Always uses the SFP port (even if a 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 setting.)
•
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.
•
10h - Supports 10 Mbps half-duplex operation
•
10f - Supports 10 Mbps full-duplex operation
•
100h - Supports 100 Mbps half-duplex operation
•
100f - Supports 100 Mbps full-duplex operation
•
1000f (Gigabit ports only) - Supports 1000 Mbps full-duplex operation
•
Sym (Gigabit ports only) - Check this item to transmit and receive pause frames.
•
FC - (Gigabit ports only) 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.