Chelsio Communications Terminator Series Installation And User Manual page 39

Chapter I. Chelsio Unified Wire
Example: To set 25G speed on 100G port:
[root@host~]# ethtool -s <ethX> speed 25000 autoneg off
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Twinax
Twinax cables support auto-negotiation. The following speeds can be set in the advertise field.
o Advertise only 100G
[root@host~]# ethtool --change <ethX> advertise 0x4000000000
o Advertise only 40G
[root@host~]# ethtool --change <ethX> advertise 0x2000000
o Advertise only 50G
[root@host~]# ethtool --change <ethX> advertise 0x400000000
o Advertise only 25G
[root@host~]# ethtool --change <ethX> advertise 0x80000000
o Advertise 100/50/40/25G
[root@host~]# ethtool --change <ethX> advertise 0x4482000000
o Auto-negotiation OFF
The advertise option is only supported with Auto-negotiation enabled. If it is disabled or to
set 10G/1G speeds (which do not support Auto-negotiation), use the following command:
[root@host~]# ethtool -s <ethX> speed <speed> autoneg off
Setting Pause
Pause Autonegotiation is enabled by default. To override it and set Pause parameters, run:
[root@host ~]# ethtool -A <ethX> autoneg off tx on rx on
Chelsio Unified Wire for Linux 39