Solved: Command switchport access vlan is useful together with trunk mode ?

eigrpy · ‎09-18-2015

Hi Anyone can talk a look the following configuration. Do you think the switchport access vlan 3 is useful together with trunk mode? Thank you

interface GigabitEthernet6/6
switchport
switchport access vlan 3
switchport trunk allowed vlan 9
switchport mode trunk

channel-group 8 mode active

devils_advocate · ‎09-18-2015

I think that because you have manually told the port it is going to be a Trunk (i.e switchport mode trunk) then the access vlan command is redundant.

The operational mode will be Trunk and if the other end is not configured as a Trunk then the port will not come up.

If you wanted to have the port failover to access mode if a Trunk is not negotiated then you can use the #switchport mode dynamic desirable. This means that if the other end wants to be a Trunk, you will get a Trunk. If the negotiation fails or the other end is configured as an access port then that is what you will get.

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devils_advocate · ‎09-18-2015

I think that because you have manually told the port it is going to be a Trunk (i.e switchport mode trunk) then the access vlan command is redundant.

The operational mode will be Trunk and if the other end is not configured as a Trunk then the port will not come up.

If you wanted to have the port failover to access mode if a Trunk is not negotiated then you can use the #switchport mode dynamic desirable. This means that if the other end wants to be a Trunk, you will get a Trunk. If the negotiation fails or the other end is configured as an access port then that is what you will get.