IEEE 802.1Q – VLAN Tagging and Trunking in Networking
IEEE 802.1Q is the networking standard that defines VLAN (Virtual Local Area Network) tagging on Ethernet frames. VLANs allow network administrators to segment a physical network into …
VLAN1 and VLAN Hopping Attack - Cisco Learning Network
This VLAN Hopping Attack method would be possible by having the attacker and the target machines connected to the same switch. The attacker in this case would use malicious …
What is the Native VLAN used for? - Cisco Learning Network
On an 802.1q trunk, there is one VLAN that can be untagged. This is called the native VLAN. The switches on both sides of the trunk understand that any frames that are not tagged with a …
Why and how are Ethernet Vlans tagged?
Jan 31, 2015 · I hear about VLAN tagging, but I don’t quite understand the concept. I know a trunk cannot accept untagged packets without configuring a native VLAN, and that access ports only …
A quick summarized view to Private VLAN (PVLAN)
Feb 13, 2020 · Introduction: This document is anticipated for understanding Private Virtual LAN (PVLAN) concept; how VLAN is sub-divided into isolated sub-domains and the communication …
The Unsung Hero of Networking: Unveiling the Native VLAN
Mar 24, 2025 · Switch (config-if)# switchport trunk native vlan <vlan-id> Replace <vlan-id> with the VLAN number you want as the Native VLAN. To check the setup, use: Switch# show …
VLAN Configuration - Cisco Learning Network
Each VLAN have separate IP address. I also configured inter-switch link as trunk link.
What are the differences between Native Vlan vs Default Vlan vs …
The default VLAN is always set to VLAN 1 and it is the VLAN that comes pre-configured on every switch (Cisco, HP, etc). The concept behind this is that the switch needs at least one VLAN to …
Best Practices for Inter-VLAN Routing in CISCO
In this discussion, lets explore the best ways to set up Inter-VLAN Routing on Cisco devices, using simple explanations and clear examples to help configure network efficiently.
How to see if a VLAN is part of a trunk? - Cisco Learning Network
The command you have shonw, do mean I have to check all interfaces individually, to see if the VLAN is allowed over the trunk. This cost a lot of time, especially if a switch has a lot of trunk …