3Com Switch 4800G 24-Port Configuration Manual page 913

c
Configuring NTDP
Parameters
Manually Collecting
NTDP Information
To do...
Enter system view
Enable NTDP globally
Enable NTDP for the port
CAUTION:
For NTDP to work normally, you must enable NTDP both globally and on the
■
specified port.
The NTDP function is mutually exclusive with the BPDU TUNNEL function under
■
a port and you cannot enable them at the same time. For the detailed
description of the BPDU TUNNEL function, refer to "BPDU Tunneling
Configuration" on page 141.
If the subtending port or the port connecting the management device to a
■
member/candidate device is a port of a member in an aggregation group, you
must enable NDP on all member ports of the aggregation group at the same
time. Otherwise, NDP will work abnormally.
You are recommended to disable NDP on the port which connects with the
■
devices that do not need to join the cluster, preventing the management device
from adding the device which needs not to join the cluster and collecting the
topology information of this device.
Follow these steps to configure NTDP parameters:
To do...
Enter system view
Configure the range within
which topology information is
to be collected
Configure the interval to
collect topology information
Configure the delay to
forward topology-collection
request packets on the first
port
Configure the port delay to
forward topology collection
request
The management device collects topology information periodically after a cluster is
created. In addition, you can configure to manually collect NTDP information to
initiate NTDP information collection, thus managing and monitoring the device on
real time, regardless of whether a cluster is created.
Follow these steps to configure to manually collect NTDP information:
Configuring the Management Device
Use the command...
system-view
ntdp enable
interface interface-type
interface-number
ntdp enable
Use the command...
system-view
ntdp hop hop-value
ntdp timer interval-time
ntdp timer hop-delay time
ntdp timer port-delay time
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Remarks
-
Optional
Enabled by default
Optional
NTDP is enabled on all ports
by default.
Remarks
-
Optional
By default, the hop range for
topology collection is 3 hops.
Optional
1 minute by default.
Optional
200 ms by default.
Optional
20 ms by default.