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Message-ID: <CAEPa5y=PPO1PoaMqgB1ifc64GVK8NkGDtnOftTZ=n+-f-7e7xA@mail.gmail.com> Date: Wed, 27 Nov 2013 07:46:55 +0100 From: Mark Trompell <mark@...esightlinux.org> To: Vlad Yasevich <vyasevich@...il.com> Cc: Veaceslav Falico <veaceslav@...ico.eu>, Linux-Kernel <linux-kernel@...r.kernel.org>, netdev <netdev@...r.kernel.org>, herbert@...dor.apana.org.au Subject: Re: bridge not getting ip since 3.11.5 and 3.4.66 On Tue, Nov 26, 2013 at 4:25 PM, Vlad Yasevich <vyasevich@...il.com> wrote: > On 11/26/2013 08:27 AM, Mark Trompell wrote: >> Answering my own mail again and even top posting, sorry, but makes >> more sense to me in that case). >> I reverted bridge related patches from 3.11.5 and it boils down to >> commit 0e308361d7ca0bf8b23fd472b90aae0fb10a1c32 >> Author: Herbert Xu <herbert@...dor.apana.org.au> >> Date: Thu Sep 12 17:12:05 2013 +1000 >> >> bridge: Clamp forward_delay when enabling STP >> >> [ Upstream commit be4f154d5ef0ca147ab6bcd38857a774133f5450 ] >> >> At some point limits were added to forward_delay. However, the >> limits are only enforced when STP is enabled. This created a >> scenario where you could have a value outside the allowed range >> while STP is disabled, which then stuck around even after STP >> is enabled. >> >> This patch fixes this by clamping the value when we enable STP. >> >> I had to move the locking around a bit to ensure that there is >> no window where someone could insert a value outside the range >> while we're in the middle of enabling STP. >> >> Causing the issue for me. Reverting that patch and br0 comes up again >> and gets an ip. > > yes, that patch introduced a bug where we always used the > max_forward delay value. > > you have 2 options: > 1) disable STP. Since you are just running VMs and you have a single > physical connection on the bridge, you can safely disable STP since > your system is a leaf node. disabling stp indeed helps here, but ... > 2) Get the latest stable kernel. The bug has been fixed there. 3.12.1 still doesn't work with stp enabled. I guess you're talking about 4b6c7879d84ad06a2ac5b964808ed599187a188d bridge: Correctly clamp MAX forward_delay when enabling STP which should fix that? > -vlad Mark >> >> On Tue, Nov 12, 2013 at 11:57 AM, Mark Trompell <mark@...esightlinux.org> wrote: >>> On Mon, Nov 11, 2013 at 1:52 PM, Mark Trompell <mark@...esightlinux.org> wrote: >>>> On Mon, Nov 11, 2013 at 12:07 PM, Veaceslav Falico <veaceslav@...ico.eu> wrote: >>>>> On Mon, Nov 11, 2013 at 11:29 AM, Mark Trompell <mark@...esightlinux.org> wrote: >>>>>> my bridge br0 doesn't get an ip from dhcp anymore after 3.11.5 and 3.4.66, >>>>>> What information would be helpful and required to find out what's going wrong. >>>>> >>>>> CC netdev >>>>> >>>>> First thing would be to provide the network scheme. Do you use vlans? >>>>> Which network >>>>> cards/drivers are you using? Do you use some kind of virtualization? >>>>> Is bonding involved? >>>>> >>>> Actually this is my desktop machine using kvm for a virtual machine >>>> that uses eth0 which is connected to the bridge >>>> which is used as interface for the host. >>>> >>>> $ ip addr >>>> 2. eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast >>>> master br0 qlen 1000 >>>> ... >>>> 3. br0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue >>>> ... >>>> >>>> Anything else? >>> >>> Okay more about my hardware and configuration: >>> from lspci: >>> 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network >>> Connection (rev 04) >>> >>> /etc/sysconfig/network-scripts/ifcfg-br0 >>> DEVICE=br0 >>> ONBOOT=yes >>> MACADDR=00:19:99:ac:b3:24 >>> TYPE=Bridge >>> BOOTPROTO=dhcp >>> STP=on >>> NM_CONTROLLED=no >>> DELAY=0 >>> >>> /etc/sysconfig/network-scripts/ifcfg-eth0 >>> DEVICE=eth0 >>> HWADDR=00:19:99:cd:a5:e6 >>> #BOOTPROTO=dhcp >>> ONBOOT=yes >>> BRIDGE=br0 >>> TYPE=Ethernet >>> NM_CONTROLLED=no >>> >>> >>>> Greetings >>>> Mark >> >> >> > -- Mark Trompell Foresight Linux Xfce Edition Cause your desktop should be freaking cool (and Xfce) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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