Cisco switch vlan trunk

A VLAN trunk is an OSI Layer 2 link between two switches that carries traffic for all VLANs (unless the allowed VLAN list is restricted manually or dynamically). To enable trunk links, configure the ports on either end of the physical link with parallel sets of commands.

1. What is a VLAN trunk port on a switch?
2. What is VLAN with trunk connection?
3. What is the difference between VLAN and trunk?
4. How do I assign a trunk to a VLAN?
5. Does Switchport mode trunk allow all VLANs?
6. What is the difference between access mode and trunk mode on a port on a Cisco switch?
7. What is the purpose of trunking?
8. Can switches communicate with VLAN trunks?
9. What is the VLAN that all ports are assigned to by default on a Cisco switch?
10. Can you have multiple VLANs on one port?
11. Can a trunk port talk to an access port?
12. Does a trunk port need an IP address?
13. What happens if u connect PC to a trunk port?

What is a VLAN trunk port on a switch?

A trunk port is a specific type of port on a network switch that allows data to flow across a network node for multiple virtual local area networks or VLANs. ... The typical VLAN network is made up of virtualized network nodes.

What is VLAN with trunk connection?

With VLAN trunking, it's possible to extend a VLAN across the network. When you implement multiple VLANs across a network, trunk links are necessary to ensure that VLAN signals remain properly segregated for each to reach their intended destination.

What is the difference between VLAN and trunk?

VLANs are local to each switch's database, and VLAN information is not passed between switches. Trunk links provide VLAN identification for frames traveling between switches. Cisco switches have two Ethernet trunking mechanisms: ISL and IEEE 802.1Q. Certain types of switches can negotiate trunk links.

How do I assign a trunk to a VLAN?

To enable trunk links, configure the ports on either end of the physical link with parallel sets of commands. To configure a switch port on one end of a trunk link, use the switchport mode trunk command. With this command, the interface changes to permanent trunking mode.

Does Switchport mode trunk allow all VLANs?

The all option in the switchport trunk allowed vlan command means all VLANs, so you can use it to reset the switch to its original default setting (permitting all VLANs on the trunk).

What is the difference between access mode and trunk mode on a port on a Cisco switch?

access port – a port that can be assigned to a single VLAN. ... trunk port – a port that is connected to another switch. This port type can carry traffic of multiple VLANs, thus allowing you to extend VLANs across your entire network. Frames are tagged by assigning a VLAN ID to each frame as they traverse between switches.

What is the purpose of trunking?

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.

Can switches communicate with VLAN trunks?

VLAN trunks allow all VLAN traffic to propagate between switches, so that devices which are in the same VLAN, but connected to different switches, can communicate without the intervention of a router.

What is the VLAN that all ports are assigned to by default on a Cisco switch?

By default, the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN 1 by default. Note The native VLAN can be assigned any VLAN ID.

Can you have multiple VLANs on one port?

You can have three vlans on one port if the switch configuration allows it. Mine allows one for data and one for VoIP. The quick answer is yes, That's called a trunk.

Can a trunk port talk to an access port?

The trunk port basically used to connect between switches; however, the access port is used to connect computer laptops, printers, etc. We cannot extend the data from one switch to another switch, access ports via a trunk port. It can only be extended via the access port of the switch.

Does a trunk port need an IP address?

The router needs to have an IP address/mask associated with each VLAN on the trunk. However, the router has only one physical interface for the link connected to the trunk.

What happens if u connect PC to a trunk port?

Yes. Trunk ports can carry both tagged and untagged packets. Untagged packets get put on whatever is configured as the native vlan for the port.