Actual purpose of native vlan in real network

[prajithtr_2]

Hi,

    Somebody please explain me what is the actual purpose native vlan in real scenarios.I have ready many documents related native vlan and I know it will never tag the vlans.But I want to know in which situation configure native vlan in our real network.

thanks in advance..

Regards

Prajith

[jj27 · Accepted solution]

The native VLAN is simply tagged to all traffic on a trunk link that does not already have an 802.1q tag.  Some people use this for security purposes setting the native VLAN to a VLAN that is shutdown/disabled so untagged traffic essentially gets dropped.  Another application of where I've seen native VLANs used is on access point trunk ports where the management VLAN is set to native so the AP gets an IP address from it.

[Goran Milinkovic]

VLAN Native is determinated for untagged traffic which don't have 802.1q tag. Usually native VLAN ID is 1 so from security purpose the best move native vlan to ID of management vlan.