Inter VLAN Routing by Layer 3 Switch
In the Router on the stick method, both switch and router are needed but while using layer 3 switches, a single switch will perform inter-VLAN routing as well as the layer 2 functions (Vlan),
Core switches implement inter-VLAN routing
Inter-VLAN routing on a core switch allows devices in different VLANs to communicate by using Layer 3 routing through Switch Virtual Interfaces (SVIs).OverviewInter-VLAN routing is necessary because VLANs segment a network into separate broadcast domains, preventing direct communication between devices in different VLANs. A Layer 3 switch (core switch) can perform routing internally using SVIs, which act as the default gateway for each VLAN, eliminating the need for an external router and improving performance and scalability .Step-by-Step ConfigurationCreate VLANs on the Core SwitchEnter global configuration mode:CodeCopyconfigure terminal Create VLANs and assign names:CodeCopyvlan 10name Salesvlan 20name Financeexit Assign switch ports to VLANs:CodeCopyinterface range fa0/1 - 2switchport mode accessswitchport access vlan 10interface range fa0/3 - 4switchport mode accessswitchport access vlan 20 Configure Switch Virtual Interfaces (SVIs)Create an SVI for each VLAN and assign an IP address:CodeCopyinterface vlan 10ip address 192.168.10.1 255.255.255.0no shutdowninterface vlan 20ip address 192.168.20.1 255.255.255.0no shutdown These IP addresses serve as the default gateways for hosts in each VLAN .Enable IP Routing on the Core SwitchActivate Layer 3 routing:CodeCopyip routing This allows the switch to route traffic between VLANs internally .Configure Trunk Links (if connecting to other switches)Ensure uplinks to other switches are in trunk mode to carry multiple VLANs:CodeCopyinterface gi0/1switchport mode trunkswitchport trunk allowed vlan 10,20 Verify ConfigurationCheck VLAN and SVI status:CodeCopyshow vlan briefshow ip interface brief Test inter-VLAN connectivity by pinging from a host in one VLAN to a host in another VLAN.Best PracticesUse a dedicated management VLAN separate from user VLANs for switch management.Map one VLAN per IP subnet for clarity and easier troubleshooting.Enable redundancy using HSRP or VRRP for critical VLAN gateways.Use EtherChannel on uplinks for increased bandwidth and fault tolerance.Save configuration after changes:CodeCopywrite memory SummaryBy creating VLANs, configuring SVIs with IP addresses, enabling IP routing, and ensuring proper trunking, a core Layer 3 switch can efficiently perform inter-VLAN routing. This approach is scalable, reduces latency compared to router-on-a-stick, and maintains the security and segmentation benefits of VLANs .
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Legal and Compliance Requirements for Shared WiFi Infrastructure
To enforce strict tenant isolation, the network core must implement stateful, inter-VLAN firewall rules. By default, all inter-VLAN routing must be blocked (Default Deny).
VLAN vs VRF Network Segmentation Explained
. 🚀 VLAN vs VRF – Understanding the Core Difference in Network Segmentation 🌴 🔜 Network engineers often confuse VLAN and VRF, but they solve different problems. 🔹 VLAN (Virtual Local
InterVLAN Routing
In this lesson you will learn about the different options there are for routing between VLANS: Router on a stick, SVI interface or L3 interfaces.
Cisco Layer 3 Switch InterVLAN Routing Configuration
Below is a diagram that we can use as a reference in understanding how to configure Inter-VLAN routing and test inter-switch connectivity across the
Layer 3 Routing – Ubiquiti Help Center
Layer 3 Routing allows a UniFi Switch to route traffic between VLANs and to other destinations using static routes. It is possible use L3 Routing with a UniFi
InterVLAN routing using Layer 3 switch | NetworkAcademy.IO
In this lesson, we will learn to configure a multilayer switch (also called Layer 3 switch) to perform inter-VLAN routing, which was previously done using an actual router.
Inter-VLAN Routing: RoAS, SVIs & What Breaks First
Learn inter-VLAN routing with step-by-step Cisco configs for router-on-a-stick and Layer 3 SVIs. Includes HSRP redundancy, DHCP relay, ACLs, and troubleshooting commands.
Camera VLAN Setup Guide 2025 | Secure IP Camera Network
This guide covers network segmentation fundamentals, equipment selection and IP addressing, managed switch and inter-VLAN routing configuration, post-migration verification and
4.3.8 Packet Tracer – Configure Layer 3 Switching and Inter-VLAN
Capabilities of a multilayer switch include the ability to route from one VLAN to another using multiple switched virtual interfaces (SVIs), as well as the ability to convert a Layer 2 switchport
Secure VLAN configuration: a practical guide and best
VLANs segment the physical network into isolated logical networks, reducing broadcast traffic and improving performance. The correct use of access
VLAN Segmentation Best Practices for Multi-Tenant Environments
Broadcast Domain Containment and Layer 2 Security Implementation Guide Step 1: Logical Design and IP Subnet Allocation Step 2: Wired Switch Fabric Configuration Step 3: Wireless LAN Controller and
4.5.2 Lab – Implement Inter-VLAN Routing (Answers)
ObjectivesBackground / ScenarioRequired ResourcesInstructionsRouter Interface Summary TableModern switches use virtual local-area networks (VLANs) to improve network performance by separating large Layer 2 broadcast domains into smaller ones. VLANs can also be used as a security measure by separating sensitive data traffic from the rest of the network. In general, VLANs make it easier to design a network to support the goals of an organi...See more on itexamanswers Cisco Press
Inter-VLAN Routing using Layer 3 Switches (4.3) - Cisco Press
In this sample chapter from Switching, Routing, and Wireless Essentials Companion Guide (CCNAv7) for Cisco Networking Academy students, you will learn how to troubleshoot common inter-VLAN
Routing on firewall or core switches? : r/networking
Where i get confused is - where would you configure routing and interVLAN traffic? On Fortigate or core switches. In my research I''m getting mixed suggestions - Some say that core switches are for
What Is a Layer 3 Switch? Definition, How It Works,
Summary If you''re asking “what is a layer 3 switch,” the short answer is: it''s a multilayer switch that brings routing intelligence into the LAN switching
Cisco-Packet-Tracer-Enterprise-Network/README.md at main
A Cisco Packet Tracer enterprise network project demonstrating VLANs, Inter-VLAN Routing, OSPF, DHCP, PAT, ACLs, SSH, wireless networking, subnetting, and hierarchical network design. Includes
Verify VLAN Routing and Gateway Before Replacing Network
Many connectivity issues are caused by incorrect VLANs, routing, or gateway configuration rather than hardware failures. Here are three things I always verify: #VLAN Configuration - Is the device
What Is a Layer 3 Switch? Features, Benefits, and Use
Switching Functionality: At its core, a Layer 3 switch forwards packets within a single VLAN using MAC address tables, similar to a Layer 2
Layer 2 vs Layer 3 Switches in 2026: Optimizing
What is a Layer 3 Switch (Multilayer Switch)? Core Role and Capabilities A Layer 3 switch combines L2 switching with hardware-accelerated routing: It supports
Configure Inter-VLAN Routing with Catalyst Switches
This document describes how to configure Inter VLAN routing with Cisco Catalyst series switches.
Secure-Hotel-Enterprise-Network/README.md at main
Design an enterprise hotel network Implement VLAN segmentation Configure Inter-VLAN Routing Secure the network using Cisco security features Validate the implemented security controls Practice
What Is a Core Switch in Networking?
How do I configure VLANs on a core switch? VLAN configuration involves italic creating VLANs italic, italic assigning ports to VLANs, and italic configuring inter-VLAN routing.
Inter-VLAN Routing Configuration
Configuring inter-VLAN routing typically involves setting up VLAN interfaces, assigning IP addresses to each VLAN, and enabling routing on the network device.
How to Set Up VLAN Routing on a Netgear Managed Switch Using
How to Set Up VLAN Routing on a Netgear Managed Switch Using CLI Commands — Complete Guide Learn exactly how to configure inter-VLAN routing on Netgear managed switches
Enterprise-Multi-Branch-Network-OSPF/README.md at main
This project demonstrates the design and implementation of a real-world enterprise multi-branch network using Cisco Packet Tracer. The network consists of four branch offices