What Can I Do If
Two Connected Optical Ports Cannot Turn Up of Huawei switch? Such as S2700-26TP-EI-AC,
S3700-28TP-SI-AC…
Do the following
if two connected optical ports cannot be up:
1. Check the port
configurations. Ensure that the two ports are not shut down and have the
same duplex mode,
rate, and negotiation mode.
2. Check the
optical modules and fibers. Ensure that the two ports use the same type of
optical
modules, and the
port rate is the same as the rate of optical modules. The optical modules
must match the
fibers. Single-mode fibers are inserted into single-mode optical modules
and the
multi-mode fibers are inserted into multi-mode optical modules.
3. Check whether
the receive or transit power of the optical ports is within the allowed range.
If the receive or
transmit power is excessively high or low, ports cannot turn Up. The
excessively long
transmission distance or low optical fiber quality may also be the reason
why ports cannot
turn Up.
4. If the
preceding items are all normal, perform internal loopback test on the ports.
Connect
the head and tail
of a fiber to an optical module to check whether the port can go Up.
You can also run
the loopback internal command in the interface view to configure the
loopback function
on Ethernet ports. This function can test port hardware performance
without
connecting optical fibers to the port. If the port is Up, the port hardware is
in good
condition.
5. If the fault
cannot be located after the preceding operations are performed, replace the
optical modules
or fibers.
Reference commands:
