Disable VLAN communication between core switches

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Jan 21, 2026

Solved: Re: Stop communication between vlans

‎ 2019-01-09 08:01 AM Hi there, Recently started playing with vlans on my switch and figured out how to set up vlans and getting internet access on them. My next step in learning about

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Sep 09, 2025

Fix VLAN Misconfiguration: Step-by-Step Guide

How to Fix VLAN Misconfiguration: Step-by-Step Guide to Correcting VLAN Settings Introduction VLAN (Virtual Local Area Network) misconfiguration can lead to

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Oct 28, 2025

How to configure Management VLANs for Omada

The client cannot access managed network devices: Conclusion Till now we have introduced how to set up a large scale network and use different VLAN networks

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May 05, 2026

Technical Tip: Advanced Intra-VLAN Isolation on FortiSwitch (vs

Description This article describes how to block intra-VLAN traffic between devices connected to the same VLAN using a FortiSwitch feature managed by...

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May 16, 2026

Cisco 9300 Switch || restrict the inter VLAN communication

Hi Techies, We have 2 cisco 9300 switch installed in our infra, 1 switch is use for Core activity and another is Access Switch, the routings happed on the core switch... on the Core SW

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Feb 24, 2026

Turn off inter-VLAN routing or block communications

There is a much better way of doing all of this -- instead of using the 3 DD-WRT routers, put all of your VLANs on your OpenWrt router... It makes your

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Aug 19, 2025

Inter-VLAN Routing: Configuration Examples

Inter-VLAN routing enables routers or Layer 3 switches to route traffic between VLANs. Because the use case is so common, network administrators need to

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Feb 22, 2026

How can I block traffic between two specific VLANs

I have a Dell 6224 powerconenct switch acting as the core switch on our network. I have a number of VLANs configured, and the time has come for us to now consider blocking traffic between specific

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Aug 27, 2025

Stop communication between vlans | NETGEAR Communities

If you want to assign a port to be a member of VLAN 10, the PVID should also be included. If the device is a VLAN aware (like VoIP, L2 Switches, Routers, etc.), you just need to put a T or

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Jan 13, 2026

VLAN Configuration Guide, Cisco IOS XE 17.13.x

Monitoring Private VLANs Configuration Examples for Private VLANs Where to Go Next Additional References Feature History for Private VLANs

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Dec 19, 2025

Best practice for controlling inter-VLAN access

When you''re implementing intervlan access control on a L3 switch, the most efective and manageable option is to use routed ACLs ''RACL'' applied to SVIs. These operate at L3 and allow you

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Aug 17, 2025

VLAN Configuration Guide, Cisco IOS XE 17.14.x (Catalyst 9400 Switches)

Configuring VLANs When deploying Cisco StackWise Virtual, ensure that VLAN ID 4094 is not used anywhere on the network. All inter-chassis system control communication between stack

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Dec 12, 2025

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Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu.

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Jun 05, 2026

Deny access from other VLANs / Allow internet

Hi guys! I have a use-case where I''m using a L3 core switch (IP services) with InterVLAN enabled and below VLANs. VLAN 10 SERVERS 192.168.10.0/24 VLAN 20 CLIENTS

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Jan 26, 2026

Re: Disable communication between VLANS on same Switch.

‎ 12-28-2010 05:48 AM Khalid, You cannot accomplish this with a 2950 Catalyst switch. The 2950 is a Layer2 switch which keeps all VLANs strictly isolated from each other. If you need to allow

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Apr 14, 2026

Best way to block inter-Vlan routing on a Cisco SG Layer 3 switch

Greetings all, I''m setting up a Cisco SG550 Layer 3 switch and want to prevent inter-vlan routing on some of the VLANs. I''ll be using ACL and applying them to their associated VLANs in

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Sep 29, 2025

Disable intervlan routing between two vlans

You have some options: disable inter-vlan routing for all vlans on Cisco switch with no ip routing command; remove default gateway from PCs (prevents reaching remote networks), use

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Jul 23, 2025

CONFIGURATION GUIDE: Routing Between VLANs

Trying to establish inter-VLAN communication? Check out our guide to routing between VLANs here! Real problems, hands on examples for each step along the

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Oct 12, 2025

Configure Inter-VLAN Routing with Catalyst Switches

By implementing Inter-VLAN routing, organizations can maintain the benefits of VLAN segmentation while still allowing necessary communication

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Mar 20, 2026

I am trying to block communication between 2 VLANs on Layer 2 Switch

I am currently having 2 VLANs - VLAN10 (10.10.10.0/24) and VLAN172 (172.20.100.0/24) on a Cisco SG550 Switch running in Layer 2 mode. I need to block communication between them

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Apr 06, 2026

Cisco Catalyst 1200 Administration Guide

Port VLAN Membership GVRP Settings Voice VLAN Auto-Surveillance VLAN VLAN Settings The creation of a VLAN allows you to create separate broadcast domains on a switch. The

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Sep 24, 2025

Cisco Catalyst 1300 Administration Guide

If multiple neighbor switches and/or routers advertise their voice VLAN, such as Cisco Unified Communication (UC) devices, the voice VLAN from the device with the lowest MAC address

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Feb 16, 2026

Allowing only routed traffic, block intra-VLAN forwarding

The core switches are currently configured without ACL, simply routing between VLAN 1 and 3. The question is then how to implement an ACL for the Core

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Aug 20, 2025

Chapter 14 Configuring VLANs

Policy-based VLANs allow users to assign VLANs on a protocol (IP, IPX, Decnet, AppleTalk, NetBIOS, Other), sub-net (IP Sub-net and IPX Network), port or 802.1Q tagged basis. VLANs are used to refer

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Mar 02, 2026

Restricting Traffic with Isolated Switch Ports

Port isolation allows a network administrator to prevent traffic from being sent between specific ports. This can be configured in addition to an existing VLAN

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