Trunking

[jonk34567]

i have a trunk line between 2 switches.on one side of the switch i do the below configuration 

 ( switch-1)

# int fa 0/0  

#switchport trunk encap dot1q

#switchport mode dynamic desirable 

#end

on the other end ( switch-2) 

# int fa 0/0

#switchport mode dynamic auto 

# end

will the trunk line work even if i do not configure the encapsulation on the 2nd switch 

[Rick1776]

It should because it’s on auto mode make sure you bring up the auto switch second

[Julio E. Moisa · Accepted solution]

Hi

It will enable a trunk. There are switches with implicit dot1q , now you can check the port status and Operational Trunking Encapsulation through: show interface fa0/0 switchport.

If it is configured as dot1q it will create a trunk. Now a best practice is configure both ends with the same config. 

🙂

[Rick1776]

I agree.

[paul driver · Accepted solution]

Hello

Just like to add to julio comments -

In the interface configuration the switchport trunk encapsulation dot1q will take precedence of the dynamic command, but the trunk will come up as negotiated trunk ( DTP)

res

Paul