Setting The Delaydown Timer - H3C S3610-28P Operation Manual

Operation Manual – DLDP
H3C S3610&S5510 Series Ethernet Switches
Follow these steps to set the interval for sending Advertisement packets:
To do...
Enter system view
Set the interval for
sending
Advertisement
packets
Caution:
Set the interval for sending Advertisement packets to a value not longer than
one-third of the STP convergence time. If the interval is too long, STP loops may
occur before unidirectional links are torn down; if the interval is too short, network
traffic may increase in vain due to excessive Advertisement packets.
To enable DLDP to operate properly, make sure the intervals for sending
Advertisement packets on both sides of a link are the same.

1.2.4 Setting the DelayDown Timer

On some ports, when the Tx line fails, the port goes down and then comes up again,
causing optical signal jitters on the Rx line. When a port goes down due to a Tx failure,
the device transits to the DelayDown state instead of the Inactive state to prevent the
corresponding neighbor entries from being removed. In the same time, the device
triggers the DelayDown timer. If the port goes up before the timer expires, the device
restores the original state; if the port remains down when the timer expires, the devices
transits to the Inactive state.
Follow these steps to set the DelayDown timer
To do...
Enter system view
Set the DelayDown
timer
Use the command...
system-view
dldp interval time
Use the command...
system-view
dldp delaydown-timer
time
1-12
Chapter 1 DLDP Configuration
Remarks
—
Optional
5 seconds by default
The interval for sending
Advertisement packets applies to
all the DLDP-enabled ports.
Remarks
—
Optional
1 second by default
DelayDown timer setting applies
to all the DLDP-enabled ports.