Re: [Xen-users] 2 network connection for dom0 and domU(s)

[Gabor Szilagyi <szilagyi@xxxxxxxxxxxx>]

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chris wrote:
> In my experience its because the bridge is not brought up unless the
> interface is configured. Does the eth1 on dom0 have an IP address or did
> you put it up with ifconfig?

Thanks Chris,

Yes, it is fully configured (second network cable is not attached right
now but was tested). Actually /etc/network/interfaces file is fully
configured on the dom0 for eth0 and eth1 ... just the second network is
not in the location where the host is now :-) could this be an issue?

See ifconfig print out in my message below.

Again, when I have only one bridge declared in the domU config (see
below it comes up fine with one interface using the modifed wrapper but
with both it hangs

Gabor

> 
> - chris
> 
> On Thu, Feb 18, 2010 at 10:21 AM, Gabor Szilagyi <szilagyi@xxxxxxxxxxxx
> <mailto:szilagyi@xxxxxxxxxxxx>> wrote:
> 
> I am new to xen and went through the wiki(s) on bridging btw dom0
> and domU.
> 
> My physical host has two network card which needs to be attached to two
> different network (one private one public).
> 
> First using one bridge was successful but I am having trouble to bring
> up the second. I have tried to  modifie the xendconfig and tried to
> create a custom wrapper for the bridging script following some examples.
> 
> The dom0 is Debian Squeeze (base install) with dom0 kernel compiled from
> the jeremy's tree (no problem there). The Hypervisor 3.4.2 (64bit)
> 
> I have not found exact receipt for the layout I want
> 
> dom0 -- eth0 -- XX.XX.242.0/24 -- "bridge1" -- eth0 -- domU1
> dom0 -- eth1 -- 10.0.0.0/24 <http://10.0.0.0/24>    -- "bridge2" --
> eth1 -- domU1
> 
> All the interfaces will be using static IP (I have no problem
> configuring those within their OS).
> 
> 
> Current setup:
> 
> rasnew:/etc/xen# cat xend-config.sxp|grep -v ^#|grep bridge
> (network-script network-bridge-custom)
> (vif-script vif-bridge)
> 
> rasnew:/etc/xen# cat ./scripts/network-bridge-custom
> #!/bin/sh
> /etc/xen/scripts/network-bridge "$@" netdev=eth0
> /etc/xen/scripts/network-bridge "$@" netdev=eth1
> 
> 
> The test domU config is like this the uncommented line would hang the
> domU although it shows up in xm list
> 
> rasnew:/etc/xen# cat test1_pv.cfg
> bootloader = '/usr/lib/xen-3.4/bin/pygrub'
> memory = 256
> name = "testPV"
> vif = [ 'mac=00:16:3e:00:01:06, bridge=eth0' , ]
> #vif = [ 'mac=00:16:3e:00:01:06, bridge=eth0' , 'mac=00:16:3e:10:01:01,
> bridge=eth1', ]
> disk = [ 'phy:/dev/vm-vg/testdomU.disk,xvda1,w', ]
> 
> On the host both eth0 and eth1 us up :
> 
> rasnew:/etc/xen# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:21:86:ef:3e:bb
>          inet addr: XX.XX.242.105  Bcast: XX.XX.242.255
>  Mask:255.255.255.0
>          inet6 addr: fe80::221:86ff:feef:3ebb/64 Scope:Link
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:643696 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:61616 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>          RX bytes:129478544 (123.4 MiB)  TX bytes:7094105 (6.7 MiB)
> 
> eth1      Link encap:Ethernet  HWaddr 00:0e:0c:64:cf:3c
>          inet addr:10.0.0.105  Bcast:10.0.0.255  Mask:255.255.255.0
>          UP BROADCAST MULTICAST  MTU:1500  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
> 
> 
> 
> Not sure what else I should list here :-)
> 
> Any suggestion would be appreciated. Can this be done with the xen
> scripts or I have to build the bridges manually?
> 
> Thanks.
> 
> Gabor
> 

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| Gabor Szilagyi (Mr.)                    Gabor.Szilagyi@xxxxxxxxxxxx |
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