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native vlan

can anybody told me in detail

1) what is tagged traffic

2) what is untagged traffic

Kindly explain me in term of native vlan... funda

1 REPLY
Cisco Employee

Re: native vlan

Over a dot1q trunk, traffic in VLANs other than Native VLAN is tagged with a 4 byte header which has the following fields

http://www.cisco.com/warp/public/473/741_4.html#topic2

Native VLAN does not have this tag. Newer switches/IOS does have an option to tag native VLAN as well. The above page has additional info which you will find useful.

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