R2511-HP MSR Router Series Network Management and Monitoring Configuration Guide(V5)

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Configuring NDP parameters
An NDP-enabled port periodically sends NDP packets that have an aging time. If the receiving device
has not received any NDP packet before that aging time expires, the receiving device automatically
removes the neighbor entry for the sending device.
To avoid NDP table entry flappings, make sure the NDP aging timer is equal to or longer than the NDP
packet sending interval.
To configure NDP parameters:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the interval for
sending NDP packets.
ndp timer hello hello-time
Optional.
The default setting is 60 seconds.
3. Configure the period for the
receiving device to keep the
NDP packets.
ndp timer aging aging-time
Optional.
The default setting is 180 seconds.
Enabling NTDP globally and for specific ports
For NTDP to work correctly, you must enable NTDP both globally and on specific ports.
To enable NTDP globally and for specific ports:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable NTDP globally.
ntdp enable
Optional.
By default, this function is enabled.
3. Enter Ethernet interface view
or Layer 2 aggregate
interface view.
interface interface-type
interface-number
N/A
4. Enable NTDP on the port.
ntdp enable
Optional.
By default, NTDP is enabled on all
ports.
To avoid the management device
collecting unnecessary topology
data, disable NTDP on ports
connected to non-candidate
devices.
Configuring NTDP parameters
NTDP parameter configuration includes the following:
• Limiting the maximum number of hops (devices) from which topology data is collected.
• Setting the topology data collection interval.
• Setting the following topology request forwarding delays for requested devices' NTDP-enabled
ports: