
Networking
221
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Forcing the Network Driver to Use
a Specific Speed
The VMkernel network device drivers start with a default setting of 100Mbps, full
duplex. This setting should work correctly with network switches set for 100Mbps, full
duplex and with switches set to autonegotiate.
If you encounter problems — in particular, very low receive speeds — it is likely that
your switch is set for 100Mbps, half duplex.
To resolve the problem, either change the settings on your switch or change the
settings for the VMkernel network device using the VMware Management Interface.
1. Log in to the management interface as root.
2. Go to the Network Configuration page (Configure System > Network
Configuration).
3. Locate the device you want to reconfigure and choose the appropriate setting
from the drop-down list in the New Speed/Duplex column.
4. Click Update Network Configuration.
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