[vserver] lost eth0 on guests

Hi all,

I'am having a strage problem of losing eth0 in guest if any guest shutdown.

Host eth0 10.1.1.13
guest1 192.168.1.21
guest2 192.168.1.22
guest3 192.168.1.23

after start all guest all guest works fine , but after vserver guest1 stop,
guest2 and guest3 have no more eth0.

then start guest1 - only guest1 have eth0.

if start guest3 first, then guest1(2) and stop guest3 - then guest1
and guest2 have no eth0.
Where to dig?

when using for guest ips 10.1.1.xx all works as expected.

Versions:
                   Kernel: 2.6.30.5-vs2.3.0.36.14-pre5
                   VS-API: 0x00020304
             util-vserver: 0.30.216-pre2841; Aug 21 2009, 12:04:50

Features:
                       CC: gcc, gcc (Debian 4.3.2-1.1) 4.3.2
                      CXX: g++, g++ (Debian 4.3.2-1.1) 4.3.2
                 CPPFLAGS: ''
                   CFLAGS: '-g -O2 -std=c99 -Wall -pedantic -W -funit-at-a-time'
                 CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W
-fmessage-length=0 -funit-at-a-time'
               build/host: x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu
             Use dietlibc: yes
       Build C++ programs: yes
       Build C99 programs: yes
           Available APIs: v13,net,v21,v22,v23,netv2
            ext2fs Source: kernel
    syscall(2) invocation: alternative
      vserver(2) syscall#: 236/glibc
               crypto api: beecrypt
          python bindings: no
   use library versioning: yes

Paths:
                   prefix: /usr
        sysconf-Directory: /etc
            cfg-Directory: /etc/vservers
         initrd-Directory: $(sysconfdir)/init.d
       pkgstate-Directory: /var/run/vservers
          vserver-Rootdir: /vservers

-- 
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Michael