Cisco 6500 - Catalyst Series 10 Gigabit EN Interface Module Expansion, Configuration Manual, Page: 136 / 742

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Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
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Chapter 6 Configuring Interface Parameters
Turning Off and Turning On Interfaces
To enable communication between hosts on the same security level, enter the following command:
hostname(config)# same-security-traffic permit intra-interface
To disable these settings, add no before the command.
Turning Off and Turning On Interfaces
All interfaces are enabled by default. If you disable or reenable the interface within a context, only that
context interface is affected. But if you disable or reenable the interface in the system execution space,
then you affect that VLAN interface for all contexts.
To disable an interface or reenable it, perform the following steps:
Step 1
To enter the interface configuration mode, enter the following command:
hostname(config)# interface { vlan number | mapped_name }
In multiple context mode in a context, enter the mapped name if one was assigned using the
allocate-interface command.
Step 2
To disable the interface, enter the following command:
hostname(config)# shutdown
Step 3 To reenable the interface, enter the following command:
hostname(config)# no shutdown