Change the core switch port to trunk

How to Enable Trunking on Cisco Switch A trunk port carries many VLANs over one link between switches using 802. You turn it on with "switchport mode trunk" on the connec...

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Mar 30, 2026

multiple client owned switches into 1 core switch, native vlan trunk

On your core switch, add each VLAN as Untagged to the port that your benchmark switch is connected. Then you can keep unmanaged switches on hand to plug into the bench switch if

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Guide
Feb 16, 2026

Trunking on Cisco IOS Switch

In this lesson, we configure a trunk between two Cisco Catalyst switches using 802.1Q encapsulation. We''ll create a VLAN, assign access ports, configure the trunk, and explore the different switchport

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Guide
Oct 13, 2025

Configuring 802.1Q Trunks on Cisco Catalyst Switches

Step-by-step guide to configuring and troubleshooting 802.1Q trunk links on Cisco Catalyst 9000 series switches.

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Guide
Aug 07, 2025

Troubleshooting Trunks in a NX-OS Environment (To

One of my customers has been converting his core 6500 switches over to Nexus 7700 switches. In the first project phase, the plan was to try to just move what

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Guide
Apr 22, 2026

What is Trunk Port? How to Enable Trunking on Cisco

You turn it on with "switchport mode trunk" on the connecting interfaces at both ends. The port then adds a small VLAN ID to each frame and

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Guide
Jul 23, 2025

Solving Cisco Switch Port Mode Issue Access to Trunk Using GUI

Watch step-by-step how to identify and fix this problem using the GUI interface, without using the CLI.

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Guide
Oct 17, 2025

Configuring VLAN Trunks

When two ports on the same switch form a loop, the switch uses the STP port priority to decide which port is enabled and which port is in a blocking state. You can set the priorities on a parallel trunk port

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Guide
Nov 25, 2025

Basic & Advanced Catalyst Layer 3 Switch Configuration: Creating

The combination of the switchport mode access and switchport nonegotiate commands will ensure that the switch will never negotiate the link as a trunk link, therefore preventing an attacker

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Guide
Dec 30, 2025

How to trunk a port in Cisco Switch?

This article provides a comprehensive guide to configuring and verifying trunk ports on Cisco switches, designed for network engineers, developers, and technology enthusiasts.

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Guide
Jan 07, 2026

Configure Access and Trunk mode port of switch port

We want to send the data from one VLAN to same VLAN on other switch than we need to configure a switch port to trunk mode. Trunk mode port

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Guide
Jan 15, 2026

How to set up VLAN trunking on your managed switch

VLAN trunking is one of the quickest things to set up on any managed switch. If you''ve already set up VLANs, you know which admin pages to go to. Once on the VLAN setup pages, look

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Guide
Jun 30, 2025

Troubleshooting Trunks in a NX-OS Environment (To Trunk or Not to Trunk)

One of my customers has been converting his core 6500 switches over to Nexus 7700 switches. In the first project phase, the plan was to try to just move what was currently configured on the old cores

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Guide
Mar 07, 2026

Configuring trunk ports on Cisco switches – IT Networking Skills

In this lesson we learn how to configure trunk ports on Cisco switches and how to configure router on a stick (ROAS) for inter-VLAN routing. Part 1, the previous lesson, covered how

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Guide
Dec 07, 2025

Basic & Advanced Catalyst Layer 3 Switch

The combination of the switchport mode access and switchport nonegotiate commands will ensure that the switch will never negotiate the link as

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