# Trunk interface is not allowed on vlan in non promiscuous mode

**URL:** <https://community.a10networks.com/t/trunk-interface-is-not-allowed-on-vlan-in-non-promiscuous-mode/569>\
**Category:** System\
**Created:** [October 29, 2019, 1:51pm UTC](https://community.a10networks.com/t/trunk-interface-is-not-allowed-on-vlan-in-non-promiscuous-mode/569 "2019-10-29T13:51:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Morato](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@Morato](https://community.a10networks.com/u/Morato)\
**Post date:** [October 29, 2019, 1:51pm UTC](https://community.a10networks.com/t/trunk-interface-is-not-allowed-on-vlan-in-non-promiscuous-mode/569/1 "2019-10-29T13:51:21Z")

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Hi,  
I created the TRUNK lacp. WHEN I try create vlan and tagg to trunk id 1 the tag fail with the message: Trunk interface is not allowed on vlan in non promiscuous mode  
&nbsp;  
Example:  
interface ethernet 1/1  
&nbsp;enable  
&nbsp;trunk-group 1 lacp  
interface ethernet 1/2  
&nbsp;enable  
&nbsp;trunk-group 1 lacp  
interface ethernet 2/1  
&nbsp;enable  
&nbsp;trunk-group 1 lacp  
interface ethernet 2/2  
&nbsp;enable  
&nbsp;trunk-group 1 lacp  
interface trunk 1/1  
interface trunk 2/1  
&nbsp;  
&nbsp;  
(config:1)#vlan 1/200  
(config:1-vlan:1/200)#tagged trunk 1  
Trunk interface is not allowed on vlan in non promiscuous mode.  
(config:1-vlan:1/200)#

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<div class="post-metadata">

**Author:** ![mdunn](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@mdunn](https://community.a10networks.com/u/mdunn)\
**Post date:** [October 29, 2019, 2:21pm UTC](https://community.a10networks.com/t/trunk-interface-is-not-allowed-on-vlan-in-non-promiscuous-mode/569/2 "2019-10-29T14:21:10Z")

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Running the command “system promiscuous-mode” from configuration terminal in shared partition will resolve this, but I’m not certain on why this is a requirement for LACP functionality.

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<div class="post-metadata">

**Author:** ![Morato](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@Morato](https://community.a10networks.com/u/Morato)\
**Post date:** [October 29, 2019, 3:08pm UTC](https://community.a10networks.com/t/trunk-interface-is-not-allowed-on-vlan-in-non-promiscuous-mode/569/3 "2019-10-29T15:08:51Z")

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Hi mdunn,

You’re sure!! I runned “system promiscuous-mode” on share partition.  
After that I runned “write memory” and for fihish, I runned “reload”

Now I can create VLAN on TRUNK

Thanks