3Com Switch 7750 Configuration Guide Guide

208 CHAPTER 26: DLDP CONFIGURATION
[SW7750A] dldp unidirectional-shutdown auto
# Display the DLDP status
[SW7750A] display dldp
n
If the fibers are correctly connected between the two switches, the system displays
the connections with the neighbor as bidirectional links.
When the fibers are not correctly connected:
■ When the fibers are cross-connected, both ends are unidirectional links and the
two ends are displayed as in Disable status;
■ When one end is correctly connected and the other end is not connected, one
end is in Advertisement status and the other is in Inactive status.
# Restore the ports taken down by DLDP
[SW7750A] dldp reset
2 Configure Switch B
The configuration of Switch B is the same to that of Switch A.
n
■ Suppose the port works in the mandatory full duplex mode and the
connection at both ends of the link is normal. After DLDP is enabled, if the
optical fiber in one end is not connected, DLDP will report that the link is a
unidirectional link.
■ Suppose the port works in the non-mandatory full duplex mode. If the
optical fiber in one end is not connected, DLDP does not take effect even if
it is enabled. In this case, the port is though to be down.
■ If the link has been a unidirectional link and then DLDP is enabled, DLDP
cannot detect the unidirectional link.