Date: Thu, 8 Mar 2007 09:53:11 +1300 From: Andrew Thompson <thompsa@freebsd.org> To: Corey Smith <corsmith@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: 802.1q bridged trunk with STP Message-ID: <20070307205311.GB54828@heff.fud.org.nz> In-Reply-To: <8061fbee0703071206w58c1985fl78d7110a040fa144@mail.gmail.com> References: <8061fbee0703071206w58c1985fl78d7110a040fa144@mail.gmail.com>
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On Wed, Mar 07, 2007 at 03:06:10PM -0500, Corey Smith wrote: > Please CC: me as I am off list. > > I want to be able to create an 802.1q bridged trunk. This is nice if > you want layer 1 and 2 redundancy on an arbitrary number of logical > networks with only two physical network interfaces. > > ifconfig bridge18 inet 192.168.1.50/24 addm vlan18 stp vlan18 addm vlan118 \ > stp vlan118 up > ifconfig: unable to set bridge flags: Invalid argument > > This works if you don't enable stp but gives the error above > otherwise. Without using spanning tree you can't actually plug it > into your switch. I believe that MST support is needed in order to use spanning tree with vlans but do be honest I havnt looked too far into it. The stp code in 6.2-RELEASE explicitly does not allow stp to be enabled on a vlan and people who have removed this check have reported that it does indeed not work. HEAD and 6-STABLE both now have RSTP support in it and MST is an extension of RSTP so could be added with some work. I plan to do this sometime this year but you are welcome to kick it off. cheers, Andrew
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