[Xen-users] domU network has sleeping sickness

[Marc Teichgraeber <radar@xxxxxxxxxxx>]

Hi all,

I have a strange network problem with some domU's on three XEN-Hosts.
They are loosing their network connectivity. I do bridged networking.
   * It happens randomly and could happen right after bootup of the domU
or anytime later.
   * The domU is not reachable from another host on the LAN.
   * The domU is always reachable from the dom0 (ssh, ping).
   * I can 'repair' the connection when attaching to the console and
ping out from the domU. First nothings happens, then the machine gets
back their network. (And thats also my momentary workaround, pinging all
the time from the console)
   * Pinging from another host at the same time helps too.
   * It could be that I can ping continously from one host and another
hosts gets only every 10th packet or so back.
   * The interfaces could come back from their sleep by itself.
   * When the networks has fallen asleep, ssh on the domU from another
host hangs, it does not come back with "no route to host" or something.

I'm suspicious about the network controllers, they are the same on all
hosts: "Intel Corporation 80003ES2LAN Gigabit Ethernet Controller
(Copper)"(lspci) some kind of "Intel® PRO/1000 EB Network Connection
with I/O Acceleration"(Intel website). I've tried the latest e1000
driver from Intel but it does'nt helped.
I've checked all MAC Adresses, they are unique, also the IP Adresses.

Any ideas are welcome :)

-------------------------------------------------------------------------
"xm info" from host1,  openSUSE 10.2 (X86-64):

release                : 2.6.18.8-0.9-xen
version                : #1 SMP Sun Feb 10 22:48:05 UTC 2008
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 2
threads_per_core       : 1
cpu_mhz                : 2327
hw_caps                :
bfebfbff:20100800:00000000:00000140:0004e3bd:00000000:00000001
total_memory           : 32766
free_memory            : 21607
max_free_memory        : 21607
max_para_memory        : 21603
max_hvm_memory         : 21544
xen_major              : 3
xen_minor              : 0
xen_extra              : .3_11774-23
xen_caps               : xen-3.0-x86_64
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : 11774
cc_compiler            : gcc version 4.1.2 20061115 (prerelease) (SUSE
Linux)
cc_compile_by          : abuild
cc_compile_domain      : suse.de
cc_compile_date        : Thu Jan 10 21:22:54 UTC 2008
xend_config_format     : 2
-------------------------------------------------------------------------
"xm info" output on host2, openSUSE 10.3 (X86-64)

release                : 2.6.22.13-0.3-xen
version                : #1 SMP 2007/11/19 15:02:58 UTC
machine                : x86_64
nr_cpus                : 8
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 3000
hw_caps                :
bfebfbff:20100800:00000000:00000140:0004e3bd:00000000:00000001
total_memory           : 16382
free_memory            : 591
max_free_memory        : 591
max_para_memory        : 587
max_hvm_memory         : 577
xen_major              : 3
xen_minor              : 1
xen_extra              : .0_15042-51
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : 15042
cc_compiler            : gcc version 4.2.1 (SUSE Linux)
cc_compile_by          : abuild
cc_compile_domain      : suse.de
cc_compile_date        : Tue Sep 25 21:16:06 UTC 2007
xend_config_format     : 4

-- 
Marc Teichgraeber


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