Re: vlan double tagging

From: Brooks Davis (brooks_at_one-eyed-alien.net)
Date: 12/18/04

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    Date: Fri, 17 Dec 2004 15:22:22 -0800
To: Mike Hunter <mhunter@ack.Berkeley.EDU>

    On Fri, Dec 17, 2004 at 03:03:49PM -0800, Mike Hunter wrote:
    > On Dec 17, "Brooks Davis" wrote:
    >
    > > On Fri, Dec 17, 2004 at 01:22:02PM +0200, Donatas wrote:
    > > > hello,
    > > > i'd like to ask if there's any possibility to pass double tagged vlan packets through freebsd 5.x routers?
    > > > and....how many level1 vlans are supported on one parent device?
    > >
    > > I don't know what happens with double tagged vlan packets.
    >
    > I think what he's asking about is whether FreeBSD prevents any of the
    > nasty hacks that can be accomplished by double-tagging frames, or if there
    > is something he can do with netgraph to prevent such badness.

    My suspicion is that FreeBSD will drop the packets unless you configure
    a vlan interface on the vlan interface.

    -- Brooks 

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