Cisco Catalyst 4500 Series Configuration Manual page 1130

Configuring Port Security on Trunk Ports
Figure 47-2 Trunk Port Security
Logical representation of switch
Access port in VLAN 2
You can configure various port security related parameters on a per-port per-VLAN basis.
Note The steps involved in configuring port security parameters is similar to those for access ports. In addition
to those steps, the following per-port per-VLAN configuration steps are supported for trunk ports.
To configure port security related parameters on a per-VLAN per-port basis, perform this task:
Command
Step 1
Switch(config)# interface interface_id
interface port-channel port_channel_number
Step 2
Switch(config-if)# switchport trunk encapsulation
dot1q
Step 3
Switch(config-if)# switchport mode trunk
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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SVI 2
5/1 5/2
SV1 3
5/3
gi1/1
ISL or
dot1q trunk
Metro
Layer 2 switch
Access port in VLAN 3
Purpose
Enters interface configuration mode and specifies the
interface to configure.
The interface can be a Layer 2 port channel
Note
logical interface.
Sets the trunk encapsulation format to 802.1Q.
Sets the interface mode.
Note An interface in the default mode (dynamic auto)
cannot be configured as a secure port.
Chapter 47 Configuring Port Security
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