Readers ask: What vlans are allowed across a trunk when the range of allowed vlans is set to the default value?

What VLANs are allowed across a trunk?

VLANs 1 through 1005 are allowed on each trunk by default. However, VLAN traffic can be removed from the allowed list. This keeps traffic from the VLANs from passing over the trunk link.

How many trunk VLANs can trunk link carry?

All VLAN IDs, 1 to 4094, are allowed on each trunk.

How many different VLANs can an 802.1 Q trunk support?

All other values may be used as VLAN identifiers, allowing up to 4,094 VLANs. The reserved value 0x000 indicates that the frame does not carry a VLAN ID; in this case, the 802.1Q tag specifies only a priority (in PCP and DEI fields) and is referred to as a priority tag.

What is the difference between a default VLAN and a native VLAN quizlet?

VLAN 1 has all the features of any VLAN, except it cannot be renamed or deleted. By default, all Layer 2 control traffic is associated with VLAN 1. A native VLAN is assigned to an 802.1Q trunk port. Trunk ports are the links between switches that support the transmission of traffic associated with more than one VLAN.

How do I show VLANs on a trunk?

For traffic from a VLAN to be transmitted across a trunk, it must be allowed on the trunk. To do so, use the switchport trunk allowed vlan vlan-id command.

How do I allow all VLANs on trunk?

By default, a trunk interface can carry traffic for all VLANs. To specify that only certain VLANs are allowed on the specified trunk, use the switchport trunk allowed vlan command. If you do not configure this parameter, the trunk port uses the default VLAN as the native VLAN ID.

Can two VLANs have the same IP address?

The OSA-Express Layer 2 implementation allows the hosts to manage IP addresses and ARP cache, so it is possible to have a single guest LAN segment (or VSWITCH segment) where two different hosts use the same IP Address on different VLAN groups.

How many VLANs can you have?

Under IEEE 802.1Q, the maximum number of VLANs on a given Ethernet network is 4,094 (4,096 values provided by the 12-bit VID field minus reserved values at each end of the range, 0 and 4,095).

Does Switchport mode trunk allow all VLANs?

The all option in the switchport trunk allowed vlan command means all VLANs, so you can use it to reset the switch to its original default setting (permitting all VLANs on the trunk).

What is 802.1 Q trunking?

VLAN Trunking (802.1Q) allows physical network interfaces in a computing environment to be shared, or multi-homed. Each Virtual Local Area Network (VLAN) gets a unique VLAN tag, and each packet on the network gets branded with the tag for the VLAN it’s associated with.

Can a switch port have multiple VLANs?

You can create multiple VLANs on the Switch. By default, you can assign One Access Vlan (Data) and One Voice vlan on the switch port.

What is the difference between VLAN and 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 role of native VLAN?

This is also known as the ‘native VLAN‘. The switch assigns any untagged frame that arrives on a tagged port to the native VLAN. If a frame on the native VLAN leaves a trunk (tagged) port, the switch strips the VLAN tag out. In short, the native VLAN is a way of carrying untagged traffic across one or more switches.

What is difference between native VLAN and default VLAN?

Related – What is VLAN?



Native VLAN vs Default VLAN Comparison Table-

PARAMETER	DEFAULT VLAN	NATIVE VLAN
Modifying the VLAN	The Default VLAN is always 1, this cannot be changed.	The Native VLAN can change. It can be changed to any VLAN
Disabling VLAN	The Default VLAN cannot be disabled	NATIVE VLAN can be “disabled”