VLAN Networking

From: news-west.usenet.com (brian_at_doubledimension.com)
Date: 11/01/04

  • Next message: QNils_O=2E_Sel=E5sdal=22?=: "Re: Error in loading libstdc++..." 
    Date: Sun, 31 Oct 2004 19:11:04 -0800

    A couple of quick questions and a sanity check ... I have a very large
    network that i need to subnet and seperate out into VLANS and I want to use
    Linux.

    Right now, what I have are three Cisco Catalyst WS3548-XL switches. I need
    to create four VLANS, Admin/Sales, Engineering, Software and Manufacturing.
    I have a Cisco 2610 behind a Checkpoint firewall, load balancing two T1's
    out to the world.

    What I'm thinking about doing is setting up a Linux box (Fedora Core 2) with
    five ethernet interfaces in it. The existing switches will not do Layer 3
    routing but they will share the VLAN segments.

    So, if I were to have the four VLANS, set the Linux box as the router for
    all four and then make the fifth interface in the box my connection to the
    outside world, would this work? How would I go about configuring routing on
    the Linux host so that all the networks can talk? And lastly, assuming that
    I'm going to be using a 100MB connections between everything (as opposed to
    gig), what kind of speed constraints am I looking at? A consultant trying to
    sell me a $17k Foundry switch is telling me that the new switch will route
    at 'wire'

    speed but I was under the impression that a Linux box would do the same
    thing?

    Any help would be great here, I really don't have the luxury of spending
    $17k on a new switch right now but I need to revive a failing network.

    Thanks,

    -brian

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