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