ITTips

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Configuration modes

It exists 4 types of configuration modes:
- base: The one in which you are entering the switch. It is the equivalent of a non-privileged user in Linux
- enable: It is the equivalent of the root user in Linux but you can only see things and not change them
- conf t: you can do modification which affect the equipment globally
- interface: you do modification on interfaces

From this page: http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_25_see/configuration/guide/swvlan.html#wp1092283∞

Configuring the Native VLAN for Untagged Traffic :
A trunk port configured with IEEE 802.1Q tagging can receive both tagged and untagged traffic. By default, the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN 1 by default.