R3303-HP HSR6800 Routers High Availability Configuration Guide
41
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Set DLDP mode.
dldp work-mode { enhance | normal }
Optional.
Normal by default.
Setting the interval to send advertisement packets
DLDP detects unidirectional links by sending Advertisement packets. To make sure DLDP can detect
unidirectional links promptly before network performance deteriorates, set the advertisement interval
appropriate for your network environment. The interval should be set shorter than one third of the STP
convergence time. If the interval is too long, STP loops might occur before unidirectional links are
detected and shut down. If the interval is too short, the number of advertisement packets will increase. HP
recommends that you use the default interval in most cases.
The Advertisement packet sending interval applies to all DLDP-enabled ports.
To enable DLDP to operate correctly, make sure the two sides of the link use the same Advertisement
packet sending interval.
To set the Advertisement packet sending interval:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Set the interval to send
Advertisement packets.
dldp interval time
Optional.
5 seconds by default.
Setting the DelayDown timer
The DelayDown timer setting applies to all DLDP-enabled ports.
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. To avoid this problem, when a port goes down due to a Tx failure, the device
transits to the DelayDown state instead of the Inactive state. This prevents the corresponding neighbor
entries from being removed. At 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 device transits to the Inactive state.
To set the DelayDown timer
Ste
p
Command
Remarks
1. Enter system view.
system-view
N/A
2. Set the DelayDown
timer.
dldp delaydown-timer time
Optional.
1 second by default.