[Lxc-users] Networking fails sporadically in containers on ubuntu server 12.10

[David Parks]

It's currently working again with 2 LXC containers, though I can't make out
what I've done to fix it this time (a restart of the whole VM was involved).
Here's the output you suggested:

 

I’ll take another look at this output when I encounter the problem again.

 

 

root at ubuntuserver:~# brctl showstp br0

br0

bridge id              8000.080027ca5f7a

designated root        8000.080027ca5f7a

root port                 0                    path cost                  0

max age                  20.00                 bridge max age
20.00

hello time                2.00                 bridge hello time
2.00

forward delay             0.00                 bridge forward delay
0.00

ageing time             300.01

hello timer               1.86                 tcn timer
0.00

topology change timer     0.00                 gc timer
108.86

flags

 

 

eth0 (1)

port id                8001                    state
forwarding

designated root        8000.080027ca5f7a       path cost                  4

designated bridge      8000.080027ca5f7a       message age timer
0.00

designated port        8001                    forward delay timer
0.00

designated cost           0                    hold timer
0.85

flags

 

veth8c3e7P (2)

port id                8002                    state
forwarding

designated root        8000.080027ca5f7a       path cost                  2

designated bridge      8000.080027ca5f7a       message age timer
0.00

designated port        8002                    forward delay timer
0.00

designated cost           0                    hold timer
0.85

flags

 

vethBXiUaM (3)

port id                8003                    state
forwarding

designated root        8000.080027ca5f7a       path cost                  2

designated bridge      8000.080027ca5f7a       message age timer
0.00

designated port        8003                    forward delay timer
0.00

designated cost           0                    hold timer
0.85

flags

 

 

 

-----Original Message-----
From: Guido Jäkel [mailto:G.Jaekel at DNB.DE] 
Sent: Wednesday, April 03, 2013 2:46 PM
To: David Parks
Subject: Re: [Lxc-users] Networking fails sporadically in containers on
ubuntu server 12.10

 

On 2013-04-03 08:27, David Parks wrote:

> I take it back, I'm still reproducing the issue. I just stopped 5 LXC 

> containers, cloned 5 from a base image, and re-set the IP to the same 

> as the original 5 were using (e.g. the MAC changed as I don't have 

> that defined in the config file). Restarting the first one now and it 

> won't ping the router or get out to the internet, and there's a ~30 

> sec delay SSHing to it from the host.  At this same time I have one 

> other LXC container running that works (this one starting working 

> after I changed the MAC of the NAT interface in virtualbox, eth0 on the
host OS).

 

Dear David,

 

what's about the STP settings (espc. "hello" time and forwarding delay) of
the involved Linux bridge(s) *and* on the external router(s)? You may e.g.
post output of "brctl showstp br0"

 

 

greetings

 

Guido

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