12
Forcibly bringing up a fiber port
CAUTION:
The following operations on a fiber port will cause link-down and link-up events before the port
finally stays up:
•
Configure both the
port up-mode
command and the
speed
or
duplex
command.
•
Install or remove fibers or transceiver modules after you forcibly bring up the fiber port.
As shown in
, a fiber port uses separate fibers for transmitting and receiving packets. The
physical state of the fiber port is up only when both transmit and receive fibers are physically
connected. If one of the fibers is disconnected, the fiber port does not work.
To enable a fiber port to forward traffic over a single link, you can use the
port up-mode
command.
This command forcibly brings up a fiber port, even when no fiber links or transceiver modules are
present for the fiber port. When one fiber link is present and up, the fiber port can forward packets
over the link unidirectionally.
Figure 1 Forcibly bring up a fiber port
Configuration procedure
To forcibly bring up a fiber port:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
Correct fiber
connection
When Ethernet
interfaces cannot
be or are not
forcibly brought up
When Ethernet interfaces
are forcibly brought up
Fiber port Tx end Rx end
The fiber is
disconnected.
Fiber link
XGE1/1/1
XGE1/1/1
Device A
Device B
XGE1/1/1
XGE1/1/1
Device A
Device B
XGE1/1/1
XGE1/1/1
Device A
Device B
The interface is
down.
Packets
Summary of Contents for S7500E-XS Series
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