3Com 4210 PWR Configuration Manual page 339

Add the device with the MAC address 0001-2034-a0e5 to the cluster blacklist,
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that is, prevent the device from being managed and maintained by the cluster.
Save the current cluster topology as the base topology and save it in the flash
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of the local management device in the cluster.
Network diagram
Figure 103 Network diagram for the enhanced cluster feature configuration
Configuration procedure
# Enter cluster view.
<aaa_0.3Com> system-view
[aaa_0.3Com] cluster
# Add the MAC address 0001-2034-a0e5 to the cluster blacklist.
[aaa_0.3Com-cluster] black-list add-mac 0001-2034-a0e5
# Backup the current topology.
[aaa_0.3Com-cluster] topology accept all save-to local-flash
Cluster Configuration Example 337