H3C S7500E Series Instruction Manual page 22

Figure 2 Forcibly bring up a fiber port
Correct fiber
connection
Device A
Device B
Fiber port
Configuration restrictions and guidelines
When you forcibly bring up a fiber port, follow these restrictions and guidelines:
•
This feature is not supported on 10-GE interfaces on the LSQ1TGS8SC0 or LSQ1GP24TXSD0
interface module.
•
For fiber ports connected to the same physical link to operate correctly, you must configure this
feature for both of them.
•
The port up-mode, shutdown, and loopback commands are mutually exclusive.
•
Either of the following operations on an interface forcibly brought up will cause the interface to
go down before staying physically up:
Configure the speed and duplex commands on the interface.
Remove and install fibers or transceiver modules.
•
A GE fiber port forcibly brought up cannot correctly forward traffic if it is installed with a
fiber-to-copper converter, 100/1000-Mbps transceiver module, or 100-Mbps transceiver module.
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
1. Enter system view.
When Ethernet interfaces
cannot be or are not forcibly
brought up
Tx end Rx end
Command
system-view
Device A
Device B
Fiber link
Packets
16
When Ethernet interfaces
are forcibly brought up
Device A
Device B
The fiber is disconnected.
The interface is down.
Remarks
N/A