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Switches to the Ethernet interface configuration mode for port 0/1.
2.
(config-if)# switchport isolation interface fastethernet 0/2,0/4
(config-if)# exit
Blocks forwarding from ports 0/2 and 0/4 on port 0/1. This setting blocks one-way
forwarding of transmissions to port 0/1.
3.
(config)# interface fastethernet 0/2
(config-if)# switchport isolation interface fastethernet 0/1
(config-if)# exit
Switches to the Ethernet interface configuration mode for port 0/2, and blocks
forwarding from port 0/1 on port 0/2. With this setting, communication is blocked both
ways between ports 0/1 and 0/2.
4.
(config)# interface fastethernet 0/4
(config-if)# switchport isolation interface fastethernet 0/1
(config-if)# exit
Switches to the Ethernet interface configuration mode for port 0/4, and blocks
forwarding from port 0/1 on port 0/4. With this setting, communication is blocked both
ways between ports 0/1 and 0/4.
18.4.3 Changing blocked ports
Points to note
The
commands are used to change the ports blocked by the inter-port relay blocking
functionality. When the
switchport isolation interface gigabitethernet
command is used to batch specify ports already set, the specified settings are
replaced.
Command examples
1.
(config)# interface fastethernet 0/1
(config-if)# switchport isolation interface fastethernet 0/2-10
Switches to the Ethernet interface configuration mode for port 0/1, and blocks ports
0/2 to 0/10 from forwarding to port 0/1.
2.
(config-if)# switchport isolation interface add fastethernet 0/11
(config-if)# switchport isolation interface remove fastethernet 0/5
Adds port 0/11 and removes the port 0/5 setting. Now ports 0/2 to 0/4 and ports 0/6 to
0/11 are blocked from communicating with port 0/1.
3.
(config-if)# switchport isolation interface fastethernet 0/3-4
(config-if)# exit
Sets ports 0/3 to 0/4 as ports to be blocked. All previous settings are overwritten.
Ports 0/3 to 0/4 are blocked from forwarding to port 0/1, but communication remains
possible on other ports.
switchport isolation add
switchport isolation interface fastethernet
18 Extended VLAN Functionality
and
switchport isolation remove
<IF#>
configuration
<IF#>
or
configuration
291
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