What is Cisco VLAN trunking?

A VLAN trunk is an OSI Layer 2 link between two switches that carries traffic for all VLANs (unless the allowed VLAN list is restricted manually or dynamically). To enable trunk links, configure the ports on either end of the physical link with parallel sets of commands.

Can you trunk a VLAN?

A trunk is a point-to-point link between one or more Ethernet switch interfaces and another networking device such as a router or a switch. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you can extend the VLANs across an entire network.

How do I assign a VLAN to a 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.

What is the difference between Ipbase and Ipservices?

The IP base is for the Standard Multilayer Software Image (SMI) switches, and the IP services image is for the Enhanced Standard Multilayer Software Image (EMI) switches in Cisco IOS Software Release 12.2(25)SEB and later.

What is the difference between Ipbase and universal IOS?

You’re mixing software licensing e.g., IP Base with the binary software image. The way the software is packaged here is that there is a single image, that being the Universal image, which has all the supported features for the platform.

Why is VLAN trunking used?

Why is trunking important to VLAN configuration? With VLAN trunking, it’s possible to extend a VLAN across the network. When you implement multiple VLANs across a network, trunk links are necessary to ensure that VLAN signals remain properly segregated for each to reach their intended destination.

What is the purpose of trunking?

A network trunk is a communications line or link designed to carry multiple signals simultaneously to provide network access between two points. Trunks typically connect switching centers in a communications system. The signals can convey any type of communications data.

How do I see if a VLAN is on the trunk?

Use the show interfaces trunk command to check whether the local and peer native VLANs match. If the native VLAN does not match on both sides, VLAN leaking occurs. Use the show interfaces trunk command to check whether a trunk has been established between switches.

How many trunk VLANs can trunk link carry?

All VLAN IDs, 1 to 4094, are allowed on each trunk. However, you can remove VLANs from the allowed list, preventing traffic from those VLANs from passing over the trunk.

What is IP Lite Cisco switch?

IP Lite is subset of IP Base features. Some of the IP Lite features are: ● Routing Information Protocol (RIP) v1. ● Routing Information Protocol (RIP) v2. ● Open Shortest Path First (OSPF) v2 Routed Access.