switch interface config question

aueddonline

This readout is used in one of the questions in the study guide, what would be the point in configuring the port as 'access vlan 5' if there is a trunk configured?


Catalyst6500-IOS#show run interface gigabitEthernet 3/9
Building configuration...
Current configuration : 137 bytes
!
interface GigabitEthernet3/9
mtu 9216
no ip address
switchport
switchport access vlan 5
switchport trunk encapsulation dot1q
end

srg

Since the port isnt configured as a static trunk with "switchport mode trunk" it's using DTP to try and negotiate with the other side if it should be a trunk or not. If it fails to negotiate a trunk with the other side, it'll fall back to beeing a accessport in the vlan 5.

aueddonline

srg wrote:

Since the port isnt configured as a static trunk with "switchport mode trunk" it's using DTP to try and negotiate with the other side if it should be a trunk or not. If it fails to negotiate a trunk with the other side, it'll fall back to beeing a accessport in the vlan 5.

Thanks srg