Date: Fri, 17 Jun 2005 16:50:49 +0400 From: Gleb Smirnoff <glebius@FreeBSD.org> To: meno.abels@adviser.com Cc: freebsd-net@FreeBSD.org Subject: Re: FreeBSD 5.4 802.1q and linux stalls Message-ID: <20050617125049.GB45094@cell.sick.ru> In-Reply-To: <344de287050617043219810b3@mail.gmail.com> References: <344de287050617043219810b3@mail.gmail.com>
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Meno, On Fri, Jun 17, 2005 at 12:32:37PM +0100, Meno Abels wrote: M> i have here a very strange problem which is in real a linux problem M> but it is triggered by freebsd. I run a lan on which are linux 2.6.8(debian) and M> freebsd 5.4 systems are connected to a unmanaged gigabit switch. All systems M> uses this gigabit adapter: M> Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet M> Everything works fine until i do on one freebsd box the following: M> ifconfig vlan0 172.20.21.1 netmask 255.255.255.0 vlan 2 vlandev re0 M> i just do this, there is nowhere any configuration for 802.1q on any other M> machine on this lan. M> What is happen now the freebsd continues to run without any problem, but M> all linuxs are stopping to understand any arp responses from a freebsd M> nor an other linux. M> So they stop to work over the time on this lan anymore. If I do M> "ifconfig vlan0 unplumb" M> it takes up to 10 minutes and the linux's are return to the working M> status as before M> the ifconfig vlan0... M> I didn't not have any clue which network packet could cause these behavior in M> a linux but there has to be one. Does anybody as any idea? Try to tcpdump on linux when you create vlan on FreeBSD. Any unusual packet at this moment? M> On that lan there is UDP-Broadcast(spread) and multicast traffic(ganglia) M> also there are around 120 carp addresses configured on the 10 freebsd boxes. M> Everything else is standard tcpip/nfs traffic. There is no firewall M> rules on the interfaces on thes linuxs or the freebsds. Any routing software? RIP or OSPF? -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE
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