Multiple VLANs to a single Internet Gateway

Posted on 2005-04-21
Last Modified: 2013-11-30
Dear Sir,

I'm having the following situation:
I have Cisco Catalyst Switch 2950 to which I want to assign VLANs.
The switch (through one of the ports) is connected to Linksys Wireless Router WRT54G (has four RJ-45 ports)
Then the Linksys Router is connected to ADSL Modem, so the router is set as a Internet Gateway (

Right now the PCs connected to the switch have Internet access through the router (as it is DHCP server), all of the ports belong to VLAN1 I guess by default.

I need to make two or more VLANs (2,3,4...) which will have Internet access through the Linksys router, but make sure that communications between the VLANs is impossible. So it will be impossible to access from one PC (VLAN 2) to another PC (VLAN 3) except Internet (which is through router, connected to the same switch).

So please, using my present network equipment, could you explain to me what and how I need to configure the switch and the router if neccessery.

Thank you in advance,

Question by:malinkovski
    LVL 79

    Assisted Solution

    You can make all the VLAN's you want, but they will never be able to communicate with anything outside their own VLAN without a Layer 3 switch, or a VLAN-capable router.
    With what you have, it is not possible.
    LVL 27

    Accepted Solution

    You can't do it with present equipment.  You need to step up to a professional router which could either do sub interfaces or understand 802.1q VLAN tagging.
    LVL 27

    Expert Comment

    Agree with lrmoore.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Free camera licenses with purchase of My Cloud NAS

    Milestone Arcus software is compatible with thousands of industry-leading cameras for added flexibility. Upon installation on your My Cloud NAS, you will receive two (2) camera licenses already enabled in the software. And for a limited time, get additional camera licenses FREE.

    What’s a web proxy server? A proxy server is a server that goes between clients and web servers, used in corporate to enforce corporate browsing policy and ensure security. Proxy servers are commonly used in three modes. A)    Forward proxy …
    Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    17 Experts available now in Live!

    Get 1:1 Help Now