08-26-2008 05:46 PM - edited 03-06-2019 01:00 AM
Can someone explain to me what 'vlan dot1q tag native' does? and what the native vlan is and how it relates to trunking? i ran into a problem earlier today and was able to fix it by using that command.... not sure if that is the right way or what i really did, looking for some explanations. thank you, greatly appreciated
08-26-2008 06:15 PM
well, by default the native vlan on a trunk default (vlan 1) is not tagged with a dot1q tag. That command tells the switch to tag the native vlan on whatever trunk port it is configured.. so all vlans will carry a dot1q tag. dont know that situation but you might have had a native vlan mismatch on the trunk and tagging it resolved it on one of the sides, but i doubt that was the correct solution.
08-26-2008 06:58 PM
On an 802.1q trunk all vlans are tagged with a vlan ID except for the native vlan which is sent untagged. The native vlan can be any vlan you want although as Yandy says it is by default vlan 1.
The reason for a native vlan is to provide backwards compatability with older switches that do not understand vlan tagging. You can choose to tag the native vlan if this isn't needed.
Jon
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide