Precautions During Dldp Configuration - H3C S7500 Series Operation Manual

Operation Manual – DLDP
H3C S7500 Series Ethernet Switches
Reset the
status of
DLDP on a
port
Caution:
This command only applies to the ports in DLDP down status.
If a port is DLDP down, it can return to the up state automatically. You do not need to
reset DLDP on the port.

1.3.3 Precautions During DLDP Configuration

DLDP does not work on a port where you configure duplex and rate forcibly, such
as 10 GE port.
DLDP works only when the link is up.
To insure that DLDP neighbors can be established properly and unidirectional
links can be detected, you must make sure: DLDP is enabled on both ends, and
the interval of sending DLDP advertisement packets, authentication mode and
password are consistent on both ends.
You can adjust the interval of sending DLDP advertisement packets (which is 5
seconds by default and in the range of 1 seconds to 100 seconds) in different
network circumstances, so that DLDP can respond rapidly to link failure. The
interval must be shorter than one-third of the STP convergence time, which is
generally 30 seconds. If too long an interval is set, an STP loop may occur before
DLDP shut down unidirectional links. On the contrary, if too short an interval is set,
network traffic increases, and port bandwidth is reduced.
DLDP is also applicable to STP Discarding ports. Ports discarded by STP can set
up normal DLDP neighbors and detect unidirectional links.
DLDP does not process any LACP event, and treats each link in the aggregation
group as independent.
The mandatory duplex mode must be enabled on both ends of the DLDP link. In
this way, unidirectional links will be reported and the ports can be shut down as
required; if the auto-negotiation duplex mode is configured on both ends,
To do...
Enter Ethernet port
view
Reset the status of
DLDP on 100 M
Ethernet ports
Reset the status of
DLDP on Gigabit
Ethernet ports
1-13
Chapter 1 DLDP Configuration
Use the command...
interface interface-type
interface-number
dldp reset
dldp reset
Remarks
—
Optional