6.5 Trunking
Why is trunking important to VLAN configuration?
The main purpose of trunking is to carry traffic between switches and maintain the VLAN information. Unlike an access link, the trunk link does not belong to a single VLAN but instead can carry traffic from several VLANs over a point-to-point link between two devices that understand the protocol.
Which trunking protocols are supported on a Cisco 2960 switch? Which protocol is an industry standard?
A special protocol is used to carry multiple VLANs over a single link between two devices. There are two trunking technologies: Inter-Switch Link (ISL): A Cisco proprietary trunking encapsulation. IEEE 802.1Q: An industry-standard trunking method.
What protocol does a Cisco switch use to automatically detect trunk ports?
A trunk port is a port that is assigned to carry traffic for all the VLANs that are accessible by a specific switch, a process known as trunking. Trunk ports mark frames with unique identifying tags - either 802.1Q tags or Inter-Switch Link (ISL) tags - as they move between switches.
By default, traffic from which VLANs are allowed on trunk ports?
By default, a trunk interface can carry traffic for all VLANs. To specify that only certain VLANs are allowed on the specified trunk, use the switchport trunk allowed vlan command. You can specify the IDs for the VLANs that are allowed on the specific trunk port.
What is the default configuration of most Cisco switches?
If the switch is using the factory default IP address of 192.168.1.254, you must chose an IP address for the computer in the range of 192.168.1.1—192.168.1.253 that is not already in use.
