1-11
Note that:
z Only the management switch can collect topology periodically, and a member switch cannot.
However, you can use the ndp explore command on the member switch to start a topology
collection process manually.
z After a cluster is set up, the management switch will collect the topology information of the network
at the topology collection interval you set and automatically add the candidate switches it discovers
into the cluster.
z If you do not want the candidate switches to be automatically added into the cluster, you can set the
topology collection interval to zero, and use the add-member command to add the candidate
switches to the cluster manually.
Examples
# Set the topology collection interval to 30 minutes.
<aaa_0.Sysname> system-view
System View: return to User View with Ctrl+Z.
[aaa_0.Sysname] ntdp timer 30
ntdp timer hop-delay
Syntax
ntdp timer hop-delay time
undo ntdp timer hop-delay
View
System view
Parameters
time: Device forwarding delay in milliseconds. This argument ranges from 1 to 1,000.
Description
Use the ntdp timer hop-delay command to set the delay for devices to forward topology collection
requests.
Use the undo ntdp timer hop-delay command to restore the default device forwarding delay.
By default, the device forwarding delay is 200 ms.
Network congestion may occur if large amount of topology response packets reach the collecting
device in a short period. To avoid this case, each collected switch in the network delays for a period
before it forwards a received topology collection request through each NTDP-enabled port.
You can use the ntdp timer hop-delay command to set the delay on a collecting switch. The delay
value you set by the command is carried in the topology collection requests sent by the collecting switch,
and is used by collected devices to determine how long they should wait before they can forward the
received topology collection requests.
Examples
# Set the delay for collected switches to forward topology collection requests to 300 ms.
<aaa_0.Sysname> system-view
System View: return to User View with Ctrl+Z.
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