Brocade Communications Systems 415 - Manual (Page 37)

Brocade Adapters Administrator’s Guide 23
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Basic port configuration
3
Configuring the port speed using the BCU
Enter the following command to set the port speed.
bcu port --speed <port_id> [<speed>]
Refer to “port” on page 151 for details about this command.
Frame data field size
Buffer credits determine the maximum amount of frame data. If the number of buffer credits is not
large enough to handle the link distance and speed, performance can be severely limited.
See “Buffer credits” on page 20 for information about buffer credits.
Specifying the maximum frame size using HCM
1. Select Configure > Basic Port Configuration from the Host Connectivity Manager.
The Basic Port Configuration dialog box displays.
2. Select the frame size from the Frame Data Field Size list. Options include 512, 1024, 2048,
2112 Mbps and auto. The default value is 2112.
3. Click Apply to apply the change.
4. Click OK to close the window.
Configuring the frame data field size using the BCU
The dfsize command sets the ports maximum receive data field size. If you do not specify a value,
the driver default receive buffer size displays, which is 2112.
NOTE
The new receive data field size takes effect when the port is re-enabled.
Enter the following command to set the frame data field size.
bcu port --dfsize <port_id> [<dfsize>]
Refer to “port” on page 151 for details about this command.