On 12/08/2011 09:25 AM, Ulli Horlacher wrote: > On Thu 2011-12-08 (07:39), Daniel Lezcano wrote: >> On 12/08/2011 12:38 AM, Joseph Heck wrote: >> >>> I've been seeing a pause in the whole networking stack when starting >>> and stopping LXC - it seems to be somewhat intermittent, but happens >>> reasonably consistently the first time I start up the LXC. >>> >>> I'm using ubuntu 11.10, which is using LXC 0.7.5 >>> >>> I'm starting the container with lxc-start -d -n $CONTAINERNAME >> That could be the bridge configuration. Did you do 'brctl setfd br0 0' ? > I have this in my /etc/network/interfaces (Ubuntu 10.04): > > auto br0 > iface br0 inet static > address 129.69.1.227 > netmask 255.255.255.0 > gateway 129.69.1.254 > bridge_ports eth0 > bridge_stp off > bridge_maxwait 5 > post-up /usr/sbin/brctl setfd br0 0 > > > I have never noticed a network freeze and I really often start/stop LXC > containers. Does this "brctl setfd br0 0" prevent the freeze? I do not > remember why I have added it :-}
The setfd delay is used when there are several bridge setup on the system to detect if the packet are looping across the bridges and to learn the spawning tree control. AFAIR, a packet is transmitted on the new port and the bridge waits for <delay> to see if the packet goes out of the bridge and came back from another port. During this delay, the port is not enabled. When there are only one bridge on the system or the bridges are not connected together, this option is pointless and we can set the delay to '0'. That makes the port to be enabled instantaneously, hence the container can access the network immediately after the start. ------------------------------------------------------------------------------ Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
