H3C s3100 series Command Manual page 193

When a member port of an aggregation group joins/leaves an isolation group, the other ports in the
same aggregation group on the local device will join/leave the isolation group at the same time.
For ports that belong to an aggregation group and an isolation group simultaneously, removing a
port from the aggregation group has no effect on the other ports. That is, the rest ports remain in
the aggregation group and the isolation group.
Ports that belong to an aggregation group and an isolation group simultaneously are still isolated
even when you remove the aggregation group in system view.
Adding a port of an isolation group to an aggregation group causes all the ports in the aggregation
group being added to the isolation group.
By default, the isolation group contains no port.
Example
# Add Ethernet1/0/1 to the isolation group.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface ethernet1/0/1
[Sysname-Ethernet1/0/1] port isolate
[Sysname-Ethernet1/0/1] quit
[Sysname] interface ethernet1/0/2
[Sysname-Ethernet1/0/2] port isolate
After the configuration, packets cannot be exchanged between Ethernet 1/0/1 and Ethernet 1/0/2.
# Remove Ethernet1/0/2 from the isolation group.
[Sysname-Ethernet1/0/2] undo port isolate
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