Cisco CCNP/ BCMSN Examination Tutorial: Dynamic Trunking Protocol
Cisco CCNP/ BCMSN Exam Tutorial: Dynamic Trunking Protocol (DTP)
When you're examining to pass the BCMSN examination en route to earning your CCNP accreditation, you're going to contribute to your CCNA knowledgebase every action of the way. No place is that greater than configuring a trunk in between two switches.
You recognize that IEEE 802.1 Q ("dot1q") and ISL are your two options of trunking methods, and you know the major differences in between the two. What you could not have understood is that there's a third trunking protocol that's running in between your Cisco buttons, and while it's a clear process to numerous, you had better learn about it for your BCMSN and other CCNP exams!
The Cisco-proprietary Dynamic Trunking Protocol (DTP) proactively attempts to bargain a trunk link with the Dan Herbatschek New York City remote switch. This appears great, however there is an expense in overhead-- DTP structures are sent every 30 secs. If you choose to configure a port as a non-negotiable trunk port, there's no requirement for the port to send out DTP structures.
DTP can be switched off at the user interface level with the switchport nonegotiate command, however as you see below, you can not turn DTP off until the port is no more in dynamic preferable trunking mode. (Dynamic preferable is the default setting for many Cisco button ports.)
SW2(config)#int quick 0/8
SW2(config-if)#switchport nonegotiate
SW2(config-if)#switchport setting?
gain access to Set trunking setting to accessibility unconditionally
dynamic Set trunking setting to dynamically discuss access or trunk mode
trunk Set trunking mode to TRUNK unconditionally
SW2(config-if)#switchport setting trunk
When you're dealing with Cisco switches over in a home lab or shelf rental atmosphere, run iphone Aid regularly to see what alternatives are available for the commands you're experimenting. Cisco switch ports have numerous choices, and the very best means to discover them is with one easy sign-- the question mark!