R211x-HP Flexfabric 11900 Layer 2 - LAN Switching Configuration Guide

Figure 2 Forcibly bring up a fiber port

Configuration restrictions and guidelines

When you forcibly bring up a fiber port, follow these guidelines:

• The port up-mode command is mutually exclusive with any of the shutdown, speed, duplex, and

loopback commands.

• After you forcibly bring up a fiber Ethernet port, the fiber port stays physically up regardless of

whether or not a transceiver module or a fiber connection is present for the port.

• A GE fiber port cannot correctly forward traffic if you configure the port up-mode command on the

port and install an electro-optical module, 100/1000-Mbps transceiver module, or 100-Mbps

transceiver module into the port. To solve the problem, use the undo port up-mode command on the

fiber port.

Configuration procedure

To forcibly bring up a fiber port:

Step Command Remarks

1. Enter system view.

system-view N/A

2. Enter Ethernet interface

view.

interface interface-type

interface-number

N/A

Correct fiber

connection

When Ethernet

interfaces cannot

be or are not

forcibly brought up

When Ethernet interfaces

are forcibly brought up

The fiber is

disconnected.

Fiber link

XGE1/0/1

Device A

Device B

XGE1/0/1

Device A

Device B

XGE1/0/1

Device A

Device B

The interface is

down.

Packets

Fiber port Tx end Rx end