Re: [Xen-users] Network problem after updates

[Francisco Barrera <francisco.barrera@xxxxxxxxx>]

Can anybody help me with this problem?


El lun, 24-05-2010 a las 12:20 +0200, Francisco Barrera escribió:
>     Hi all,
>     
>     I've a serious problem with my dom0 xen installation, that's why I'm blocked to daily work.
>     I come to describe my virtualization scenary and the arised problem.
>     
>     Hardware is a Dell server with 3 physicall ethernet network cards and 16 GB RAM.
>     Initially installed CentOS-5.2 with Xen-3.0.3 and 2.6.18-128.el5xen kernel.
>     Dom0 with 7 domU paravirtuallized (they have CentOS like os also).
>     One domU is configured like a Firewall, using one of the physicall NICs through pciback, that directly connect with the ISP modem-router.
>     Until here all worked ok and I was happy :)
>     
>     Later, I was made the next updates through "yum update/upgrade" and "yum install Virtualization": Xen 3.4.1 version, CentOS-5.4 and 2.6.18-164.el5xen kernel.
>     Initially all worked fine, except some stuffs related to bridge name (it came to xenbr0 to eth0).
>     The problem arise when from certain day, the network was freezed, collapsed.
>     Anything of the domUs can answer to ping command, except dom0 that is the only I can access via ssh.
>     Testing some issues, the network recovers if I shutdown the domU Firewall.
>     
>     I guess that the source of the problem must be pciback kernel module or some incompatibillity with network card driver.
>     I've configured the xend-pci-permissive.sxp file to fix some messages that appears in the boot of the dom0.
>     
>     The conclusions that I've get analyzing the situation are the next:
>     - at the begining, Firewall works ok since it's overloaded by net traffic
>     - from this moment, exactly 1 hour later from boot/reboot of dom0, the network is blocked...always
>     - once the network is blocked, if I've shutdown the Firewall, the network recovers
>     - when much time the network is blocked, more time the Firewall takes to shutdown
>     
>     Any suggestion?
>     Thanks in advance.
>     
>     
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--------------------------------------------
empelt
Francisco Barrera

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francisco.barrera@xxxxxxxxx
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