HP 6125XLG R2306-HP 6125XLG Blade Switch High Availability Configuration Guide - Page 35

Configuration prerequisites, Enabling DLDP, Setting the interval to send advertisement packets,

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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 properly configure DLDP on the device, you must enable DLDP globally and on each port. To enable DLDP: Step 1. Enter system view. 2. Enable DLDP globally. Command system-view dldp global enable Remarks N/A By default, DLDP is globally disabled. 3. Enter 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. (HP recommends that you use the default interval.) To set the Advertisement packet sending interval: Step 1. Enter system view. 2. Set the interval to send Advertisement packets. Command system-view dldp interval time Remarks N/A 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: 30

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30
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 properly 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 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. (HP recommends that you use 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: