3-12
Configuring Ethernet Interfaces
Ethernet Interfaces
For example, you might enter:
ProCurve(config-eth 0/1)# speed 100
Note If you configure a default setting for speed, the Ethernet interfaces still
negotiate the duplex setting—either full-duplex or half-duplex. Some Ethernet
devices cannot negotiate duplex if the speed is manually set. To avoid possible
problems, you may want to manually configure the duplex setting if the speed
is manually set. (Manually configuring the duplex setting is described in the
next section.)
You can enter one of the following commands to return to the default setting
for speed:
ProCurve(config-eth 0/1)# speed auto
or
ProCurve(config-eth 0/1)# no speed
Configuring the Line for Half-Duplex or Full-Duplex
The Ethernet modules support both full-duplex and half-duplex. By default,
the Ethernet modules operate at full-duplex. If you need to change this setting,
enter:
ProCurve(config-eth 0/1)# half-duplex
To return to the default setting, you can enter one of the following commands:
ProCurve(config-eth 0/1)# full-duplex
or
ProCurve(config-eth 0/1)# no half-duplex
Setting the MTU
The maximum transmission unit (MTU) defines the largest size that an Ether-
net frame can be. If a frame exceeds the MTU, it must be fragmented. By
default, the MTU for Ethernet interfaces is 1500 bytes.
For most environments you should keep the default MTU size. However, you
may need to adjust the MTU if the interface is connected to another device
that uses a different MTU size and you have enabled Open Shortest Path First
(OSPF) routing on the ProCurve Secure Router. OSPF routers cannot become
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