R2511-HP MSR Router Series Interface Configuration Guide(V5)

The LINK LED of a GE combo interface might be on when you insert or remove a transceiver module into

or from the combo interface whose fiber combo port is active on an MSR50 router, SIC-1GEC module,

XMIM-16FSW module, or XMIM-24FSW module. To solve the problem, shut down the combo interface

with the shutdown command and then bring it up with the undo shutdown command.

The fiber combo port and the copper combo port share one interface view, in which you can activate the

fiber or copper combo port, and configure other port attributes such as the interface rate and duplex

mode.

Configuration prerequisites

Before you configure combo interfaces, complete the following tasks:

• Determine the combo interfaces on your device by checking the product specifications and identify

the two physical interfaces that compose each combo interface.

• Use the display interface command to determine whether the fiber port or copper port of the combo

interface is active. If the current port is the copper port, the output includes "Media type is twisted

pair, Port hardware type is 1000_BASE_T." If the current port is the fiber port, the output does not

contain the information mentioned above. You can use the display this command in combo

interface view to determine whether the fiber port or copper port of the combo interface is active.

If the combo enable fiber command exists in the output, the fiber port is active. Otherwise, the

copper port is active.

Changing the active port of a combo interface

Step Command Remarks

1. Enter system view.

system-view N/A

2. Enter Ethernet interface view.

interface interface-type

interface-number

N/A

3. Activate the copper combo

port or fiber combo port.

combo enable { copper | fiber }

By default, the copper combo port

is active.

Configuring basic settings of an Ethernet interface or

subinterface

Configuring an Ethernet interface

You can set an Ethernet interface to operate in one of these duplex modes:

• Full-duplex mode (full)—Interfaces that operate in this mode can send and receive packets

simultaneously.

• Half-duplex mode (half)—Interfaces that operate in this mode cannot send and receive packets

simultaneously.

• Auto-negotiation mode (auto)—Interfaces that operate in this mode negotiate a duplex mode with

their peers.

You can set the speed of an Ethernet interface or enable it to automatically negotiate a speed with its

peer.

To configure an Ethernet interface: