From the course: Deploying Layer 2 Switching for Cisco Networks by Pearson

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Dynamic Trunking Protocol (DTP)

Dynamic Trunking Protocol (DTP) - Cisco Tutorial

From the course: Deploying Layer 2 Switching for Cisco Networks by Pearson

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Dynamic Trunking Protocol (DTP)

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So, let's talk about the dynamic trunking protocol. Now, trunk ports are statically set, or they can be negotiated between two switches dynamically. Now, dynamic trunk ports are going to be established by sending the dynamic trunking protocol packets, or DTP for short, to negotiate if the remote switch port can become a trunk port. Now this is going to happen about every 30 seconds with a neighbor device that we're going to do this advertisement of the DTP packets. Now the other thing that's a requirement is the fact of the VTP domain must match between the two switches. And so that's kind of a key critical component within this. Now within this there are three modes that you can use on a switch port to kind of engage the dynamic trunking protocol. The first one is trunk, and in this mode, the switch port's gonna act as a trunk port, and it's gonna advertise DTP packets. And it's configured with the command switch port mode trunk. The second mode is dynamic desirable. And in this…

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