[Xen-users] domU with two eth but only one is active

[SZABO Zsolt <szazs@xxxxxxxxx>]

I have recently upgraded the xen system with the debian distro on
my xen machine.

So, in wheezy it has xen-4.1, and xm, and linux-3.2,
now the versions are xen-4.4 with xl toolstack, and the linux kernel is 
3.16.
On wheezy I used a modified version of the network-bridge script, but 
after the upgrade I omit this procedure and modified
/etc/network/interfaces:

auto xenbr0
iface xenbr0 inet static
    address 122.66.33.251
    netmask 255.255.255.0
    gateway 122.66.33.254
    bridge_ports eth0

auto xenbr1
iface xenbr1 inet static
    address 192.168.3.9
    netmask 255.255.255.0
    bridge_ports eth1


Thus, when I boot the xen machine, everything seems fine:

# brctl show
xenbr0          8000.0025908190d8       no              eth0
xenbr1          8000.0025908190d9       no              eth1

I can ping other hosts on both interfaces (bridges).

however, when I create (start) the new domU with lines in xl_domU.cfg
vif  = [ 'mac=00:40:f6:54:79:0f, bridge=xenbr0',
         'mac=00:16:3e:00:02:01, bridge=xenbr1' ]

and "brctl show"s
xenbr0          8000.0025908190d8       no              eth0
                                                        vif5.0
xenbr1          8000.0025908190d9       no              eth1
                                                        vif5.1

then eth0 @domU (aka vif5.0 @dom0) works
but  eth1 @domU (aka vif5.1 @dom0) does not... :-(

I have also noticed in kern.log some lines like

vif vif-5-0 vif5.0: Guest Rx ready
IPv6: ADDRCONF(NETDEV_CHANGE): vif5.0: link becomes ready
xenbr0: port 2(vif5.0) entered forwarding state

but any similar for vif-5-1 ...

What can be the problem?

--
Zsolt
PS: maybe I will try the old method with network-bridge script..

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