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[Xen-users] [SPAM] xen vm network not working

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] [SPAM] xen vm network not working
From: Wang Binbin <binbin.b.wang@xxxxxxxxx>
Date: Tue, 26 Oct 2010 13:53:06 +0800
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Hi All

I just encounter a problem, the xen vm network suddenly does not work even though no one change the configuration. and I restart the network service, it still does not work. 
After rebooting the VM,  network works well.  and I find the xen host have below log in /var/log/messages:

Oct 23 20:22:08 app_xen5 kernel: xenbr0: port 5(vif6.0) entering disabled state

Oct 23 20:22:08 app_xen5 kernel: device vif6.0 left promiscuous mode

Oct 23 20:22:08 app_xen5 kernel: xenbr0: port 5(vif6.0) entering disabled state

Oct 23 20:22:34 app_xen5 kernel: device vif9.0 entered promiscuous mode

Oct 23 20:22:34 app_xen5 kernel: ADDRCONF(NETDEV_UP): vif9.0: link is not ready

Oct 23 20:22:38 app_xen5 kernel: blkback: ring-ref 8, event-channel 27, protocol 1 (x86_32-abi)

Oct 23 20:22:41 app_xen5 kernel: ADDRCONF(NETDEV_CHANGE): vif9.0: link becomes ready

Oct 23 20:22:41 app_xen5 kernel: xenbr0: topology change detected, propagating

Oct 23 20:22:41 app_xen5 kernel: xenbr0: port 5(vif9.0) entering forwarding state

Xen version is as below:

host                   : app_xen5

release                : 2.6.18-128.el5xen

version                : #1 SMP Wed Dec 17 12:22:24 EST 2008

machine                : i686

nr_cpus                : 16

nr_nodes               : 1

sockets_per_node       : 2

cores_per_socket       : 4

threads_per_core       : 2

cpu_mhz                : 2400

hw_caps                : bfebfbff:28100000:00000000:00000140:009ce3bd:00000000:00000001

total_memory           : 12279

free_memory            : 0

node_to_cpu            : node0:0-15

xen_major              : 3

xen_minor              : 1

xen_extra              : .2-128.el5

xen_caps               : xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p

xen_pagesize           : 4096

platform_params        : virt_start=0xf5800000

xen_changeset          : unavailable

cc_compiler            : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)

cc_compile_by          : mockbuild

cc_compile_domain      : redhat.com

cc_compile_date        : Wed Dec 17 11:38:33 EST 2008

xend_config_format     : 2

Could anyone tell me the reason why the vm network  suddenly could not work?  thanks in advance.

Wang Binbin

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