Question: Why Do We Use DTP?

What is VLAN protocol?

VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network.

To do this, VTP carries VLAN information to all the switches in a VTP domain.

VTP advertisements can be sent over 802.1Q, and ISL trunks..

What is trunking mode?

Trunk ports are generally used in the switch to switch communication or switch to Router (Router on a stick). … Trunks carry multiple Vlans across devices and maintain VLAN tags in Ethernet frames for receiving directly connected device differentiates between different Vlans.

How do I turn off DTP negotiation?

There are two ways to disable DTP negotiation:Configure the interface for access mode.Use the switchport nonegotiate command on the interface.

What is VTP and how it works?

VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol used by Cisco switches to exchange VLAN information. … VTP enables you to create the VLAN only on a single switch. That switch can then propagate information about the VLAN to every other switch on the network and cause other switches to create it.

How do I disable the trunking on my access port?

If you want to disable trunking completely, use the off option for a COS switch or the no switchport mode trunk command on an IOS switch.

Which commands will disable DTP on an interface choose two?

2- Switchport nonegotiate. To disable DTP on an interface you should use switchport mode access that will set the interface to be in access mode or configure the interface to not negociate(switchport nonegociate).

Is DTP enabled by default?

DTP is enabled by default on all modern Cisco switches. … If all it takes is the right DTP packet to form a trunk from an access port, an intruder can easily inject traffic into whatever VLANs are allowed on the port (by default, all of them).

What are the features of DTP?

Desktop publishing software (DTP) is used to create documents like leaflets, brochures and newsletters. Modern word processors have the basic features of DTP software but features such as templates and frames make DTP software better for complex page layouts .

What VLAN does DTP use?

VLAN trunks formed using DTP may utilize either IEEE 802.1Q or Cisco ISL trunking protocols. DTP should not be confused with VTP, as they serve different purposes. VTP communicates VLAN existence information between switches. DTP aids with trunk port establishment.

What is the difference between VLAN and VTP?

When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. … VTP ensures that all switches in the VTP domain are aware of all VLANs. There are occasions, however, when VTP can create unnecessary traffic.

Which are the two trunking protocols?

There are two trunking protocols used on modern communication networks: Inter-Switch Link (ISL) from Cisco and the aforementioned nonproprietary IEEE 802.1Q. Of the two, IEEE 802.1Q is the industry standard. Even Cisco switches now use IEEE 802.1Q (dot1q) by default.

How do I create a native VLAN?

To configure the native VLAN ID for the virtual Ethernet interface, use the switchport trunk native vlan command. To remove the native VLAN ID from the virtual Ethernet interface, use the no form of this command.

What’s DTP default in a switch?

This is a default mode on the newer Cisco switches. By this mode, the interface will actively attempt to convert the link into a trunk link. The interface will become a trunk port if the neighbouring interface is set to trunk, desirable or auto. This mode prevents the interface from generating DTP frames.

What is DTP and VTP?

In other words, DTP allows two interconnected switches to negotiate the operating mode of a link – either an access link or a trunk. VTP is responsible for synchronizing the VLAN database across multiple switches.

What are the advantages of DTP?

Here are the primary desktop publishing advantages:Increased productivity.Reduced production costs.Improved appearance of documents.Enhanced creativity with an element of fun.Ability to produce customized documents.Reduced time to print.

How do I turn off DTP?

The first way is configuring the switchport as an access port by using the command switchport mode access. This will disable DTP and allow the switchport to operate only in the configured VLAN, if none is configured by default it will be placed into VLAN_1.