HP StorageWorks MSA 2/8 - SAN Switch Reference Manual page 366

Fabric OS Commands
To force 10 Mbps Half Duplex, follow this scenario for the ifmodeset
command:
switch:admin> ifModeSet eth0
Exercise care when using this command.
not supported by the network equipment to which it is attached may result in
an inability to communicate with the system through its ethernet interface.
It is recommended that you only use this command from the serial console port.
Are you sure you really want to do this? (yes, y, no, n): [no] y
Proceed with caution.
Auto-negotiate (yes, y, no, n): [no] n
Force 100 Mbps / Full Duplex (yes, y, no, n): [no]
Force 100 Mbps / Half Duplex (yes, y, no, n): [no]
Force 10 Mbps / Full Duplex (yes, y, no, n): [no]
Force 10 Mbps / Half Duplex (yes, y, no, n): [no] y
Committing configuration...done.
switch:admin>
See Also
ifModeShow
ifShow
366
Forcing the link to an operating mode
Fabric OS Version 3.1.x/4.1.x Reference Guide