The native vlan on a trunk port is the vlan that does not have an 802.1q tag. So multiple vlans can go across an 802.1q trunk port and the switch distinguishes between the vlans by the 802.1q vlan tag attached to the frames. The native vlan, vlan 1 by default, does not have an 802.1q tag.
The native vlan is there for backward compatability with switches that do not understand 802.1q tags. Cisco recommend either
1) tag all vlans including the native vlan
2) change the native vlan to something other than vlan 1. The vlan you choose does not have to any ports allocated to it and does not need to have a L3 SVI. The command to change the native vlan on a trunk port is
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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