adding & removing VLAN tags?

Answered Question
Nov 19th, 2007

As I recall, switches will add the VLAN tag on frames entering a VLAN configured port & remove the tag once the frame exits the switch. Assuming VTP is enabled in a LAN topology because all VLAN members do not reside on the same switch, is the VLAN tag added & removed on *each* switch traversed?

Thanks for any clarification provided.

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Correct Answer by scottmac about 9 years 2 weeks ago

The tags are added and stripped on ingress and egress from access ports.

If a host sends a frame into a VLAN port on switch A, then the frames traverses a trunk port to switch B, then exits to a host from an access port on switch B, the TAG is applied on switch A, then stripped on switch B. THe frame keeps the tag through the trunk.

Good Luck

Scott

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Correct Answer
scottmac Mon, 11/19/2007 - 15:52

The tags are added and stripped on ingress and egress from access ports.

If a host sends a frame into a VLAN port on switch A, then the frames traverses a trunk port to switch B, then exits to a host from an access port on switch B, the TAG is applied on switch A, then stripped on switch B. THe frame keeps the tag through the trunk.

Good Luck

Scott

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