Re: VLAN interfaces on FreeBSD; performance issues

From: Chuck Swiger (cswiger_at_mac.com)
Date: 09/10/05

  • Next message: Blake Covarrubias: "Re: VLAN interfaces on FreeBSD; performance issues" 
    Date: Sat, 10 Sep 2005 11:37:40 -0400
To: Blake Covarrubias <blake@yfug.yumaed.org>

    Blake Covarrubias wrote:
    > I have a question about VLAN interfaces on FreeBSD. I've read the
    > documentation and have set them up on a machine. After doing so though
    > the machine seems less network responsive. Does implementing VLAN
    > interfaces / tagging slow down network performance?

    Some, yes, although not by much and that depends to some extent on whether your
    NIC has VLAN_MTU hardware support.

    > The reason for wanting VLAN tagging is the machine has once NIC and I wanted
    > to multi-home it without having to install another NIC. The network card is
    > using the 'fxp' driver.

    fxp is a good NIC hardware. However, if you are trying to connect two distinct
    subnets, playing ISO layer-2 games with VLANs is not going to result in a good
    substitute for layer-3 IP routing.

    You cannot truthfully multihome a machine with a single NIC. 

    -- 
-Chuck
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  • Next message: Blake Covarrubias: "Re: VLAN interfaces on FreeBSD; performance issues"

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