Aggregating Two VLAN Trunks

[daredavel]

Hello,

I'm kinda new in VLAN and setup my own lab via packet tracer. I'm trying to aggregate the two trunk connection that I setup but can't seem to make it work. What am I possible missing? How can I do it correctly?

[Julio E. Moisa · Accepted solution]

Hi

If you want to make an etherchannel you need first make they have the same interface capabilities, all of them need to be FastEthernet or GigaEthernet, same speed, duplex.

So on your example I recommend FastEthernet only or GigaEthernet only. 

Now once they are equal interface, you can use, example:

interface range g0/1-2   <--- range of ports
channel-group 10 mode active  <---   (LaCP on both switches)
switchport mode trunk
no shut

interface port-channel 10
switchport trunk encapsulation dot1q  (if it is not implicit)
switchport mode trunk
no shutdown 

it could be useful:

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swethchl.html

:-)

[daredavel]

Thank you for responding julio! Should I just change the mode of fa0/24 to access mode and it will be remove as trunk and encapsulated? Thank you again.

[Julio E. Moisa]

Hi Dave

Please correct me if I understand the question wrongly. If mode access is configured under the interface it will not overwrite the trunk mode, it will have both mode under the interface and it is not considered as a good practice, it should be access or trunk but it cannot be both. 

:-)