Configuring an ethernet subinterface – H3C Technologies H3C SR8800 User Manual

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4

Step Command

Remarks

3.

Set the description.

description text

Optional.
By default, the description of an
interface is in the format of

interface-name Interface. For

example, M-Ethernet0/0/0
Interface.

4.

Set the duplex mode.

duplex { auto | full | half }

Optional.
By default, the duplex mode is auto
for Ethernet interfaces.
Optical interfaces do not support the
half keyword.
10-GE interfaces do not support this
command.

5.

Set the transmission rate.

speed { 10 | 100 | 1000 | auto }

Optional.
The default setting is auto.

6.

Restore the default settings.

default

Optional.

NOTE:

After you modify the rate or duplex mode of an interface, you must use the shutdown command to disable
the interface and then use the undo shutdown command to enable it again, so as to start a new

auto-negotiation process to make the new configuration take effect.

Configuring an Ethernet subinterface

Layer 3 Ethernet subinterface enables Layer 3 Ethernet interfaces to identify packets by VLANs. By

configuring multiple subinterfaces on an Ethernet interface, you can have packets of different VLANs

forwarded through their corresponding subinterfaces, thus achieving flexibility.
To configure an Ethernet subinterface:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Create an Ethernet
subinterface.

interface interface-type
interface-number.subnumber

This command also leads you to
Ethernet subinterface view.

3.

Set the interface description.

description text

Optional.
By default, the description of an
interface is in the format of

interface-name Interface. For

example, GigabitEthernet2/1/7.20
Interface.

4.

Restore the default settings.

default

Optional.

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