3650 port-channel, switchport mode trunk command

[JunghunLim7806]

ello,

interface port-channel 1Catalyst 36

 switchport mode trunk

             .

             .

             .

interface gi 1/0/1

  switchport mode trunk   <--  do i need this command?

                                                I want to know the difference between having this command and not.

  channel-group 1

thank you.

[pieterh]

you can configure

- switchport mode trunk

or

- switchport mode access

1) if neither of these is configured the port will negotiate to form a trunk; if this fails it reverts to mode access

2) if you KNOW it needs to be a trunk -> configure a trunk, this speeds up the port-negotiation before a port becomes active.

3) if not connected to a Cisco switch trunk negotiation may fail -> here also you may want to force mode trunk

-> do you need this? depends on argument above.

[JunghunLim7806]

thank you.

I have 'switchport mode trunk' on int port channel 1 but I want to know if it should be in int gi1/ 0/1.

[pieterh · Accepted solution]

you need it on both!

after you created the port-channel and assigned members

then whenever  you change the mode on the port-channel it will be changed on all the members of the port-channel

(as all the members of the port-channel need the same configuration)