H3C Technologies H3C S12500-X Series Switches - Manual (Page 36)

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Configuration prerequisites
Configure the full duplex mode for the ports at two ends of the link, and configure a speed for the two
ports, rather than letting them negotiate a speed.
Enabling DLDP
To correctly configure DLDP on the device, you must enable DLDP globally and on each port.
To enable DLDP:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable DLDP globally. dldp global enable
By default, DLDP is globally
disabled.
3. Enter Layer 2 or Layer 3
Ethernet interface view.
interface interface-type
interface-number
N/A
4. Enable DLDP. dldp enable
By default, DLDP is disabled on an
interface.
Setting the interval to send advertisement packets
To make sure DLDP can detect unidirectional links before network performance deteriorates, set the
advertisement interval appropriate for your network environment. (H3C recommends using the default
interval.)
To set the Advertisement packet sending interval:
Step Command Remarks
1. Enter system view. system-view N/A
2. Set the interval to send
Advertisement packets.
dldp interval time The default is 5 seconds.
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. To avoid this problem, when a port goes down due to a Tx failure, the device
triggers the DelayDown timer to prevent the corresponding neighbor entries from being removed. If the
port remains down when the timer expires, the device removes the DLDP neighbor information. If the port
goes up, the device takes no action.
To set the DelayDown timer: