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. Note: The allowed VLAN list on both the ends of the trunk link should be the same.
Which VLAN is the default native VLAN?
VLAN 1
What is Default VLAN? Default VLAN is VLAN 1 which cannot be shut down in any case and also it carries controlling traffic. In the case of Cisco (and most vendors), the Default Native VLAN is VLAN 1.
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.
Which VLANs are allowed on this trunk?
When a trunk link is established, all of the configured VLANs are allowed to send and receive traffic across the link. VLANs 1 through 1005 are allowed on each trunk by default. However, VLAN traffic can be removed from the allowed list.
What is trunk Cisco?
A trunk is a point-to-point link between two network devices that carry more than one VLAN. With VLAN trunking, you can extend your configured VLAN across the entire network. Most Cisco switches support the IEEE 802.1Q used to coordinate trunks on FastEthernet and GigabitEthernet . To enable VLAN configured…
What is switchport mode trunk?
Switchport trunk means when you have a trunk link, all VLANs are allowed to pass through a trunk link. To configure a trunk on a switch FastEthernet port, use the switchport mode trunk command. This command puts the interface into permanent trunking mode and negotiates to convert the neighboring switch or links into trunk links.
What is a Cisco trunk port?
The term trunk port means different things to diffrent vendors. For example, in Cisco it is a port that uses multiple VLANs normally used to connect two switches together so all vlans traverse the network. It can be used for other devices like ip phones that need more than 1 vlan.