H3C Technologies H3C S3100 Series Switches - Manual (Page 165)

Operation Manual – DLDP
H3C S3100-52P Ethernet Switch Chapter 1 DLDP Configuration
1-11
Note:
When two switches are connected through fibers in a crossed way, two or three ports
may be in the disable state, and the rest in the inactive state.
When a fiber is connected to a device correctly on one end with the other end
connected to no device:
z
If the device operates in the normal DLDP mode, the end that receives optical
signals is in the advertisement state; the other end is in the inactive state.
z
If the device operates in the enhance DLDP mode, the end that receives optical
signals is in the disable state; the other end is in the inactive state.
# Restore the ports taken down by DLDP
[SwitchA] dldp reset
2) Configure Switch B
The configuration of Switch B is the same to that of Switch A.
Note:
z
In order for DLDP to detect fiber disconnection in one direction, you must configure
the port to work in mandatory full duplex mode at a mandatory rate.
z
When the port works in non-mandatory full duplex mode at a non-mandatory rate,
even if DLDP is enabled, it does not take effect when the fiber in one direction is
disconnected. In that case, the port is down.