3Com Switch 7750 Configuration Guide Guide

206 CHAPTER 26: DLDP CONFIGURATION
n
■ When you use the dldp enable/dldp disable command in system view to
enable/disable DLDP globally on all optical ports of the switch, this command is
only valid for existing optical ports on the device, however, it is not valid for
those added subsequently.
■ DLDP can operate normally only when the same authentication mode and
password are set for local and peer ports.
■ When the DLDP protocol works in normal mode, the system can identify only
one type of unidirectional links: cross-connected fibers.
■ When the DLDP protocol works in enhanced mode, the system can identify
two types of unidirectional links: the first type is the cross-connected fiber, and
the second type is one of the two fibers is not connected or fails.
■ When the device is busy with services and the CPU utilization is high, DLDP
may issue mistaken reports. You are recommended to configure the operating
mode of DLDP as manual after unidirectional links are discovered, so as to
reduce the influence of DLDP mistaken reports.
■ For the dldp interval integer command, make sure that the same interval for
transmitting advertisement packets is set on the ports used to connected both
devices; otherwise DLDP will fail to pass authentication.
Resetting DLDP Status
n
Only after the ports are DLDP down due to the detection of unidirectional links
can you use the dldp reset command to reset the DLDP status of these ports to
retrieve DLDP probes.
c
CAUTION:
■ This command only applies to the ports in DLDP down status.
Display the configuration information
about the DLDP-enabled ports
display dldp [
interface-type
interface-number ]
-
Table 133 DLDP configuration tasks
Operation Command Description
Tabl e 134 Reset DLDP status
Operation Command Description
Reset the
status of
DLDP
Enter system view system-view -
Reset the status of DLDP
globally
dldp reset Optional
Reset the
status of
DLDP on a
port
Enter Ethernet
port view
interface interface-type
interface-number
-
Reset the status
of DLDP on 100
M Ethernet ports
dldp reset
Optional
Reset the status
of DLDP on
Gigabit Ethernet
ports
dldp reset