Date: Sat, 10 Sep 2005 11:37:40 -0400 From: Chuck Swiger <cswiger@mac.com> To: Blake Covarrubias <blake@yfug.yumaed.org> Cc: freebsd-isp@freebsd.org Subject: Re: VLAN interfaces on FreeBSD; performance issues Message-ID: <4322FDC4.8010609@mac.com> In-Reply-To: <ED8E7F5B-7E3F-40D8-8993-76E9AB8226F9@yfug.yumaed.org> References: <ED8E7F5B-7E3F-40D8-8993-76E9AB8226F9@yfug.yumaed.org>
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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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