What is Switchport trunk native VLAN?

The switchport trunk native vlan command specifies the native (untagged) VLAN for a Layer 2 interface operating in trunk mode on a Cisco IOS device. This command only takes effect for interfaces that are operating in trunk mode.

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Can you trunk the native VLAN?

When a native VLAN is defined, the switch automatically executes the vlan trunk allowed all command to ensure that the default VLAN is allowed on the trunk. To only allow specific VLANs on the trunk, issue the vlan trunk allowed command specifying only specific VLANs.

Do trunk ports need a native VLAN?

When frames traverse a Trunk port, a VLAN tag is added to distinguish which frames belong to which VLANs. Access ports do not require a VLAN tag, since all incoming and outgoing frames belong to a single VLAN. The Native VLAN is simply the one VLAN which traverses a Trunk port without a VLAN tag.

What is the command for native VLAN?

Table 3-6 Switch Port Trunk Commands

Enter global configuration mode.	S1# configure terminal
Specify a native VLAN for untagged 802.1Q frames.	S1(config-if)# switchport trunk native vlan vlan_id
Specify the list of VLANs to be allowed on the trunk link.	S1(config-if)# switchport trunk allowed vlan vlan-list

Why native VLAN exists on a trunk?

Basically, A Native VLAN carries untagged traffic on a trunk line. A trunk line allows mutiple VLAN traffic ( tagged traffic). So Why Native VLAN exists on a trunk.

How do I enable VLAN on trunk port?

To add a VLAN to the trunk, issue the switchport trunk allowed vlan add vlan-list command. This example shows how to remove VLANs 5 through 10 and 12. Add VLAN 7 back and verify the allowed VLANs on the trunk link.

How do I remove native VLAN from trunk?

Untagged data traffic received through the trunk will be put in the native vlan. To send data traffic untagged you must allow the native vlan through the trunk. You can also tag the native vlan traffic with the command “switchport trunk native vlan tag” command.

How do I change the native VLAN command?

How to Change the Native VLAN on a Switch – YouTube

How do you port a trunk switch?

SUMMARY STEPS. enable. configure terminal.
interface interface-id. switchport mode trunk. switchport trunk allowed vlan {add | all | except | remove} vlan-list.
end. show interfaces interface-id switchport. copy running-config startup-config.

How do I remove my trunk native Switchport?

You can use the “no” form of the command to remove the trunk configuation. You need to configure “switchport mode access” to change it from trunk to access mode.

Should you change native VLAN?

A good security practice is to separate management and user data traffic. The management VLAN, which is VLAN 1 by default, should be changed to a separate, distinct VLAN. A recommended security practice is to change the native VLAN to a different VLAN than VLAN 1.

How do I change my native VLAN?

How many native VLAN can a switch have?

One default VLAN
The native VLAN is per trunk per switch configuration. The 802.1Q trunk port assigns untagged traffic on a native VLAN.
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Difference Between Default VLAN and Native VLAN.

Criteria	Default VLAN	Native VLAN
Maximum Number of VLANs per switch	One default VLAN per switch.	Native VLANs can be as many as there are .1Q trunks on the switch.

What is Switchport trunk native VLAN?