Edge-Core ES4624-SFP Basic Management Manual page 204

Fig 4-1 A Typical Example of Port Isolation Function
The topology and configuration of switches are showed in the figure above, with e1/1,
e1/10 and e1/15 all belonging to vlan 100. The requirement is that, after port isolation is
enabled on switch S1, e1/1 and e1/10 on switch S1 can not communicate with each other,
while both of them can communicate with the uplink port e1/15. That is, the
communication between any pair of downlink ports is disabled while that between any
downlink port and a specified uplink port is normal. The uplink port can communicate with
any port normally.
The configuration of S1:
Switch(config)#isolate-port group test
Switch(config)#isolate-port group test switchport interface ethernet 1/1;1/10
Vlan
e1/1 S1
S2
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e1/15
e1/10
S3