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Contributor
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Can the "switchport trunk native vlan" be removed from a port?

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Port connects to MOE network that requires correct VLAN tag.

!

interface gigabit-switchport 0/5

  no shutdown

  switchport mode trunk

  switchport trunk allowed vlan 2

!

end

sh ru int gig 0/5 v

Building configuration...

!

!

interface gigabit-switchport 0/5

  description

  alias

  speed auto

  no flowcontrol

  mac-address 00:A0:C8:45:B2:2F

  snmp trap link-status

  power inline auto

  spanning-tree cost 0

  spanning-tree port-priority 128

  spanning-tree bpdufilter disable

  spanning-tree bpduguard disable

  no spanning-tree edgeport

  spanning-tree link-type auto

  no shutdown

  switchport mode trunk

  switchport access vlan 1

  switchport trunk native vlan 1

  switchport trunk allowed vlan 2

  no switchport voice vlan

  no switchport guest-voice vlan

  no switchport voice-signaling vlan

  no switchport softphone vlan

  switchport trunk fixed vlan none

  no storm-control broadcast level

  no storm-control multicast level

  no storm-control unicast level

  no storm-control action shutdown

  qos default-cos 0

  no qos trust cos

  no switchport port-security

  switchport port-security aging time 0

  switchport port-security aging type absolute

  no switchport port-security aging static

  switchport port-security maximum 1

  switchport port-security violation shutdown

  no switchport port-security mac-address sticky

  switchport port-security expire time 0

  switchport port-security expire type absolute

  no switchport protected

  no switchport gvrp

  lldp send-and-receive

  lldp send port-description

  lldp send system-name

  lldp send system-description

  lldp send system-capabilities

  lldp send management-address

  lldp send med-info network-policy

  lldp send 802.3-info mac-phy-config

  port-auth port-control force-authorized

  port-auth auth-mode port-based

  port-auth control-direction in

  no port-auth multiple-hosts

!

end

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Anonymous
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Re: Can the "switchport trunk native vlan" be removed from a port?

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brian_ctl:

Thank you for asking this question, as well as providing the configuration for reference.  Currently, AOS does not have a way to explicitly prevent the native VLAN from traversing a trunk port.  It has to be done a little differently.  To prevent this traffic on the ADTRAN, perform the following steps to the trunk port configuration:

1.) Allow the desired VLAN to be sent out the trunk port.

2.) Create an unused VLAN as the native VLAN on the trunk (this will prevent the default native VLAN 1 from being allowed out the trunk port).

interface switchport 0/1

  no shutdown

  switchport mode trunk

  switchport trunk native vlan <RANDOM VLAN ID NOT IN USE>

  switchport trunk allowed vlan 2

I hope that makes sense, but please do not hesitate to reply to this post with additional information or questions.  I will be happy to help in any way I can.

Levi

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Anonymous
Not applicable

Re: Can the "switchport trunk native vlan" be removed from a port?

Jump to solution

brian_ctl:

Thank you for asking this question, as well as providing the configuration for reference.  Currently, AOS does not have a way to explicitly prevent the native VLAN from traversing a trunk port.  It has to be done a little differently.  To prevent this traffic on the ADTRAN, perform the following steps to the trunk port configuration:

1.) Allow the desired VLAN to be sent out the trunk port.

2.) Create an unused VLAN as the native VLAN on the trunk (this will prevent the default native VLAN 1 from being allowed out the trunk port).

interface switchport 0/1

  no shutdown

  switchport mode trunk

  switchport trunk native vlan <RANDOM VLAN ID NOT IN USE>

  switchport trunk allowed vlan 2

I hope that makes sense, but please do not hesitate to reply to this post with additional information or questions.  I will be happy to help in any way I can.

Levi

View solution in original post

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Contributor
Contributor

Re: Can the "switchport trunk native vlan" be removed from a port?

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That is the workaround I was using, just wanted to make sure I wasn't missing something.

Thanks

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Anonymous
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Re: Can the "switchport trunk native vlan" be removed from a port?

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brian_ctl:

I marked this post as "assumed answered," but do not hesitate to reply with further questions.

Levi

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Anonymous
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Re: Can the "switchport trunk native vlan" be removed from a port?

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:

I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post and unmark it and select another in its place with the applicable buttons.  If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.

Thanks,

Levi

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