# Question TRUNK Q-in Q AND TAG NATIVE VAN
**URL:** https://forum.networklessons.com/t/question-trunk-q-in-q-and-tag-native-van/14661
**Category:** Switching
**Created:** [June 14, 2021, 6:18am UTC](https://forum.networklessons.com/t/question-trunk-q-in-q-and-tag-native-van/14661 "2021-06-14T06:18:11Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ahmed.mohamed149](https://forum.networklessons.com/u/ahmed.mohamed149)
#### Post date: [June 14, 2021, 6:18am UTC](https://forum.networklessons.com/t/question-trunk-q-in-q-and-tag-native-van/14661/1 "2021-06-14T06:18:11Z")
Hello,
TRUNK Q-in-Q is only between isp and customer ? for example can I double tag only my LAN side for more safety ?
It is good to tag VLAN NATIVE yes or no , why ?
If iI don’t allow vlan native between to two devices, it is possible that cdp, dtp… can communicate/negociate ?
In Advance thank you very much
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### Author:  [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [June 14, 2021, 8:57am UTC](https://forum.networklessons.com/t/question-trunk-q-in-q-and-tag-native-van/14661/2 "2021-06-14T08:57:10Z")
A post was merged into an existing topic: [802.1Q Tunneling (Q-in-Q) Configuration Example](https://forum.networklessons.com/t/802-1q-tunneling-q-in-q-configuration-example/1086)
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### Author:  [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [June 14, 2021, 8:57am UTC](https://forum.networklessons.com/t/question-trunk-q-in-q-and-tag-native-van/14661/3 "2021-06-14T08:57:10Z")