On Wed, Jun 15, 2011 at 5:26 AM, Martins Lazdans <marrtins@xxxxxxxx> wrote:
> Does anyone have any hint where to dig? Right now I wrote a script that
> checks ping to gateway and in case of timeouts restarts bridge and
> reattaches domUs to it. Right now bridge is stopping working like every 3
> minutes. Can this be hardware related?
>
You may want to consider setting up the bridges manually with the
CentOS networking scripts.
This is actually the default way of doing things starting with Xen 4.1
http://wiki.xensource.com/xenwiki/HostConfiguration/Networking
The standard bridging built into CentOS may end up being more stable for you.
Hope that helps.
Thanks,
Todd
> One guy replied to me directly having the same problem on CentOS (I guess it
> was CentOS).
>
> Martins Lazdans wrote:
>>
>> Hello!
>>
>> I having a problem with dom0 (running Debian lenny, latest patches
>> applied) networking getting stopped after random periods of time - it's been
>> 18 hours and it's been 5 hours. dom0 got two NIC (peth0, peth1), two subnets
>> (a, b), configured two bridges (eth0, eth1 - each subnet resides on
>> different NIC). dom0 have each NIC configured with dedicated IP form
>> correspongin subnets. So, eth0 serves subnet a, while eth1 is serving subnet
>> b.
>>
>> In xend-config.sxp:
>> (network-script network-bridge-wrapper) and network-bridge-wrapper is
>> just:
>>
>> #!/bin/sh
>> /etc/xen/scripts/network-bridge "$@" netdev=eth0
>> /etc/xen/scripts/network-bridge "$@" netdev=eth1
>>
>> After random periods of time, eth0 goes down along with all domU
>> networking attached to it. I'm unnable to connect or ping dom0 neither on
>> peth0 nor peth1 nor any of domU attached to that bridge.
>>
>> However, domU using eth1 bridge are working just fine. I can SSH to domU
>> and then SSH to dom0 on peth1 IP address (remember, I could not do that form
>> "outside").
>>
>> After I do `/etc/xen/scripts/network-bridge stop` and then start, dom0
>> networking comes back. I just do `brctl addif eth0 vifX.0` to attach domUs
>> back and all works fine till next such event.
>>
>> Anyone had experienced such thing? I've been running this server for some
>> three years w/o problems. This problem started around 31 of may. Maybe it
>> has something to do with any of latest updates?
>>
>> There are no network spikes, no high load avg, nothing in logfiles,
>> nothing on xm dmesg, ne domU restarts. I've been searching Google for some
>> days now, and nothing comes up.
>>
>> Basicly, I've got the same issue as described here:
>> http://lists.xensource.com/archives/html/xen-users/2008-03/msg00609.html
>>
>> Btw, I've got very similar issue twice with other sarver, differend
>> hardware, different data center, CentOS 5.6, Xen 3.4.2. However, that server
>> was using only one NIC so I'm not aware if this was excacly the same
>> problem. I ran into this problem twice, about two months ago. However there
>> is no errors since then which made me believe problem was solved with some
>> OS updates? Back then I thought it's beeing hardware error as I had this
>> server deployed only 3 months before incident.
>>
>> My config is below.
>>
>> Many thanks!
>>
>> # uname -a
>> Linux doom 2.6.26-2-xen-amd64 #1 SMP Tue Jan 25 06:13:50 UTC 2011 x86_64
>> GNU/Linux
>>
>> # xm info
>> host : doom
>> version : #1 SMP Tue Jan 25 06:13:50 UTC 2011
>> machine : x86_64
>> nr_cpus : 8
>> nr_nodes : 1
>> cores_per_socket : 4
>> threads_per_core : 1
>> cpu_mhz : 2200
>> hw_caps :
>> 178bf3ff:efd3fbff:00000000:00000110:00802001:00000000:000007ff
>> total_memory : 32767
>> free_memory : 2116
>> node_to_cpu : node0:0-7
>> xen_major : 3
>> xen_minor : 2
>> xen_extra : -1
>> xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
>> hvm-3.0-x86_32p hvm-3.0-x86_64
>> xen_scheduler : credit
>> xen_pagesize : 4096
>> platform_params : virt_start=0xffff800000000000
>> xen_changeset : unavailable
>> cc_compiler : gcc version 4.3.1 (Debian 4.3.1-2)
>> cc_compile_by : waldi
>> cc_compile_domain : debian.org
>> cc_compile_date : Sat Jun 28 09:32:18 UTC 2008
>> xend_config_format : 4
>>
>>
>
> --
> Martins Lazdans
>
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>
--
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/
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