Lets consider a layer 2 switch. Just see below configuration for an example...
spanning-tree mst configuration
instance 1 vlan 1-100
instance 2 vlan 101-200
switchport trunk native vlan 12
switchport trunk allowed vlan 3-20,100-200
switchport mode trunk
While making trunking in the interface please notice the vlan ranges 3-20,100-200.
Created vlans are only 3,4,12,107,150,151.
*The vlan ranges (3-20,100-200) mentioned in trunked interface cover non-created vlan ranges.
My question is mentioning in trunk interface with vlan ranges 3-20,100-200 numerically which are not created globally will cause any traffic related issues ????? , such as broadcast or others if any ?????, if it causes any issues,what will be the cause if it doesnt cause any issue - why it is so....
Anyone kindly clarify me on this
there shouldnt be any issues in your case. Switchport trunk command wont check if the vlan is created or not created.
However, if you make any changes, the best practice always is to use 'switchport trunk allowed vlan add' for a less disruption. In your case, If you already have that command on the trunk and even if you dont have some vlans created, its not a problem.