Switch trunk native and switchport trunk allowed commands

[zafar_118]

  Hello,

What will be the result of having these two commands defined on trunk

Switch(Config-if)# switchport trunk native vlan 500

Switch(Config-if)# switchport trunk allowed vlan remove 500

Thanks        

[glen.grant]

Traffic from vlan 500 will be sent untagged .

[John Blakley]

The first command would send traffic untagged over vlan 500, but the second command removes vlan 500 from the trunk, so I think you would lose traffic for anything using vlan 500....

HTH,
John

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[Jon Marshall]

Zafar

I agree with John, basically vlan 500 will not be allowed across the trunk link.

I assume the reasoning behind the configuration is that all vlans sent across the link should be tagged.

Jon