3Com Switch 4210 9-Port, Configuration Manual

Page: 333 / 567

Cluster Configuration Tasks 331
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When using the tracemac command to locate a device by its IP address, the
switch will query the corresponding ARP entry of the IP address, and then
query the MAC address based on the ARP entry to locate the specified device
finally.
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If the IP address has its corresponding ARP entry, but its corresponding MAC
address is not in the MAC address table, the switch will fail to locate the
specified device.
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If you build a cluster from the CLI or web interface and then you disable
clustering for the commander, you may lose the cluster configuration and need
to rebuild this if you wish to keep the cluster.
Configuring the
Enhanced Cluster
Features
Enhanced cluster feature overview
To configure the enhanced cluster features:
1 Cluster topology management function
After the cluster topology becomes stable, you can use the topology management
commands on the cluster administrative device to save the topology of the current
cluster as the standard topology and back up the standard topology on the Flash
memory of the administrative device .
When errors occur to the cluster topology, you can replace the current topology
with the standard cluster topology and restore the administrative device using the
backup topology on the Flash memory, so that the devices in the cluster can
resume normal operation.
With the display cluster current-topology command, the switch can display the
topology of the current cluster in a tree structure. The output formats include:
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Display the tree structure three layers above or below the specified node.
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Display the topology between two connected nodes.
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The topology information is saved as a topology.top file in the Flash memory to
the administrative device. You cannot specify the file name manually.
2 Cluster device blacklist function
To ensure stability and security of the cluster, you can use the blacklist to restrict
the devices to be added to the cluster. After you add the MAC address of the
device that you need to restrict into the cluster blacklist, even if the cluster
function is enabled on this device and the device is normally connected to the
current cluster, this device cannot join the cluster and participate in the unified
management and configuration of the cluster.
Configure the enhanced cluster features
Table 255 The enhanced cluster feature configuration tasks
Operation Description Related section
Configure cluster topology
management function Required “Configure cluster topology
management function”
Configure the cluster device
blacklist Required “Configure cluster device
blacklist”