[Xen-users] Server with 2 Nics (continuation)

["Ferreira, N. L. (Nuno)" <n.l.ferreira@xxxxx>]

Hi *.*,

This is a continuation on the 2 NICs thread after some more testing.

Just to remember my goal.
---------------------------
I want to create a domU with 2 virtual NICS. One of them will contact 
the outside world, the other one will contact a VPN. No reason in 
concrete for choosing the bridging protocol, only because its the 
default one. I installed the dom0 with the 2 NICs active, with the net 
cables already placed to get correct IP's.

My OS configuration:
----------------------
[root@enmr03 ~]# uname -a
Linux enmr03.chem.uu.nl 2.6.18-128.el5xen #1 SMP Wed Jan 21 11:12:42 EST 
2009 x86_64 x86_64
[CentOS 52 x86_64, with gitco xen running (3.3.1)]
Xen starst ok, and dom0 is seen.

[root@enmr03 xen]# xm list
Name                                        ID   Mem VCPUs      State   
Time(s)
Domain-0                                     0  1877     2     
r-----     84.3


I enabled both NICSs (eth0, eth1) while installing the OS.
An ifconfig and brctl displays the following [removed stuff]:

[root@enmr03 xen]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:15:17:8D:0B:EF
         inet addr:xxx.yyy.zzz.74  Bcast:xxx.yyy.zzz.255  
Mask:255.255.255.0
         inet6 addr: fe80::215:17ff:fe8d:bef/64 Scope:Link       

eth1      Link encap:Ethernet  HWaddr 00:15:17:8D:0B:F1
         inet addr:10.0.0.48  Bcast:10.0.0.255  Mask:255.255.255.0
         inet6 addr: fe80::215:17ff:fe8d:bf1/64 Scope:Link

lo        Link encap:Local Loopback
         inet addr:127.0.0.1  Mask:255.0.0.0
         inet6 addr: ::1/128 Scope:Host
         UP LOOPBACK RUNNING  MTU:16436  Metric:1

peth1     Link encap:Ethernet  HWaddr 00:15:17:8D:0B:F1
         inet6 addr: fe80::215:17ff:fe8d:bf1/64 Scope:Link

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
         inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
         inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link

[root@enmr03 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
eth1            8000.0015178d0bf1       no              peth1
virbr0          8000.000000000000       yes

Thus, eth1 --> peth1 seem's Ok. Following Thomas Halinka tips on a 
previous e-mail:
http://lists.xensource.com/archives/html/xen-users/2009-03/msg00772.html



I changed xend-confix.sxp file:

[root@enmr03 xen]# diff xend-config.sxp xend-config.sxp.orig.01abr09
< (network-script network-2nics)
> (network-script network-bridges)

[root@enmr03 xen]# cat /etc/xen/scripts/network-2nics
#!/bin/bash
/etc/xen/scripts/network-bridge $1 netdev=eth0 bridge=xenbr0 vifnum=0
/etc/xen/scripts/network-bridge $1 netdev=eth1 bridge=xenbr1 vifnum=1



After rebooting the machine, an ifconfig and brctl again:

[root@enmr03 ~]# ifconfig -a
lo        Link encap:Local Loopback
         inet addr:127.0.0.1  Mask:255.0.0.0
         inet6 addr: ::1/128 Scope:Host

peth0     Link encap:Ethernet  HWaddr 00:15:17:8D:0B:EF
         inet6 addr: fe80::215:17ff:fe8d:bef/64 Scope:Link
        
peth1     Link encap:Ethernet  HWaddr 00:15:17:8D:0B:F1
         inet6 addr: fe80::215:17ff:fe8d:bf1/64 Scope:Link

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
         inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
         inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link

[... snipped ... vif0.0 --> vif0.4, sit0, veth0-->veth4]

xenbr0    Link encap:Ethernet  HWaddr 00:15:17:8D:0B:EF
         inet addr:xxx.yyy.zzz.74  Bcast:xxx.yyy.zzz.255  
Mask:255.255.255.0
xenbr1    Link encap:Ethernet  HWaddr 00:15:17:8D:0B:F1
         inet addr:10.0.0.48  Bcast:10.0.0.255  Mask:255.255.255.0

[root@enmr03 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
virbr0          8000.000000000000       yes
xenbr0          8000.0015178d0bef       no              peth0
xenbr1          8000.0015178d0bf1       no              peth1



During the reboot I noticed some errors. From the Network Configuration 
Window, I see that both NICs are down, and these are the message errors 
that appeared on the reboot:
---->
Error for wireless request "Set Encode" (8B2A) :
   SET failed on device eth1 ; No such device.

Determining IP information for eth1...SIOCSIFADDR: No such device
eth1: unknown interface: No such device
eth1: unknown interface: No such device
failed.

Error for wireless request "Set Encode" (8B2A) :
   SET failed on device eth0 ; No such device.
SIOCGIFFLAGS: No such device
Failed to bring up eth0.
---->



Thus, though 2 bridges were correctly created (with the appropriate 
IP's), the physical devices are down!
Any insights?

Cheers,
N.


--
==============================================
Nuno Ricardo Santos Loureiro da Silva Ferreira

NMR Spectroscopy Research Group
Bijvoet Center for Biomolecular Research
Utrecht University
Bloembergen gebouw
Padualaan 8, 3584 CH Utrecht
The Netherlands

P: +31.(0)30.253 9932
F: +31.(0)30.253 2652
E: n.l.ferreira@xxxxx
W: http://nmr.chem.uu.nl
==============================================


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