Hello,
Last month I had a problem with Xen 3.0.3 in Debian Etch. The problem
was "arp who-has not answered", and I asked here:
http://article.gmane.org/gmane.comp.emulators.xen.user/33034
http://www.nabble.com/arp-who-has-not-answered-td15988849.html
After some suggestions I was asking for the correct configuration
without success :-( . Yesterday, finally, I got the good way to do that
so let me to describe just in case it will help to somebody.
My system: Debian Etch with Debian Etch Xen. I have these packages
installed:
-------
servidor:~# dpkg -l | grep -i xen | awk '{print $2,",",$3}'
linux-headers-2.6-xen-amd64 , 2.6.18+6etch3
linux-headers-2.6.18-6-xen , 2.6.18.dfsg.1-18etch1
linux-headers-2.6.18-6-xen-amd64 , 2.6.18.dfsg.1-18etch1
linux-image-2.6-xen-amd64 , 2.6.18+6etch3
linux-image-2.6.18-6-xen-amd64 , 2.6.18.dfsg.1-18etch1
linux-modules-2.6.18-6-xen-amd64 , 2.6.18.dfsg.1-18etch1
xen-hypervisor-3.0.3-1-amd64 , 3.0.3-0-4
xen-ioemu-3.0.3-1 , 3.0.3-0-4
xen-linux-system-2.6.18-6-xen-amd64 , 2.6.18.dfsg.1-18etch1
xen-tools , 2.8-2
xen-utils-3.0.3-1 , 3.0.3-0-4
xen-utils-common , 3.0.3-0-2
-------
I wanted NAT networking configuration (after some tests using bridge).
This machine is doing NAT from one network to one external network.
Dom0 machine is using 192.168.0.1 and DomU machine will use 192.168.10.0/24
(192.168.10.1 to "link" with Dom0)
My current /etc/xen/machine.cfg file is:
-------
kernel='/usr/lib64/xen-3.0.3-1/boot/hvmloader'
builder='hvm'
device_model='/usr/lib64/xen-3.0.3-1/bin/qemu-dm'
memory=256
name='machine'
disk=['file:/home/xen/domains/machine/root,hda,w','file:/home/xen/domains/debian-etch.iso,hdc:cdrom,r']
vif = ['mac=22:16:3e:00:00:11,type=ioemu' ] #add your script=vif-nat,
#vif-nat-personal or whatever you want.
boot='c'
vncpasswd=''
stdvga=0
pae=1
acpi=1
apic=1
vnc=1
vncviewer=1
sdl=0
-------
Before switch on the virtual machine, I need to create xenbr0 bridge (or
qemu-dm will complain and die, see on /var/log/xen/qemu-dm.log.PID where
PID is the PID of ps auxw | grep -i qemu). Feel free to add
script=personal in vif nat and then add the correct script
/etc/xen/scripts/personal.
I did it:
--------
tunctl -t tap0 -u root
ip link set up dev tap0
brctl addbr xenbr0
brctl addif xenbr0 tap0
ip link set up dev xenbr0
ip addr add 192.168.10.1/24 dev xenbr0
ip route add 192.168.10.0/24 dev xenbr0 #not needed?
brctl addif xenbr0 tap0
xm create /etc/xen/machine.hvm
--------
Final result of my networking configuration:
--------
servidor:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1A:A0:D9:D5:CE
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21a:a0ff:fed9:d5ce/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:669957 errors:0 dropped:0 overruns:0 frame:1
TX packets:950312 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:217565298 (207.4 MiB) TX bytes:1132767974 (1.0 GiB)
Interrupt:16
eth1 Link encap:Ethernet HWaddr 00:60:08:6D:09:DC
inet addr:PUBLIC IP ADD Bcast:PUBLIC IP ADD Mask:255.255.255.192
inet6 addr: fe80::260:8ff:fe6d:9dc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:513106 errors:0 dropped:0 overruns:0 frame:0
TX packets:595892 errors:0 dropped:0 overruns:0 carrier:0
collisions:2485 txqueuelen:1000
RX bytes:160333319 (152.9 MiB) TX bytes:462082545 (440.6 MiB)
Interrupt:19 Base address:0xecc0
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
RX packets:162878 errors:0 dropped:0 overruns:0 frame:0
TX packets:162878 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:798741818 (761.7 MiB) TX bytes:798741818 (761.7 MiB)
tap0 Link encap:Ethernet HWaddr 52:BE:57:00:3B:F9
inet6 addr: fe80::50be:57ff:fe00:3bf9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:64 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
tap1 Link encap:Ethernet HWaddr B6:9D:20:EE:6C:A1
inet6 addr: fe80::b49d:20ff:feee:6ca1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:148 errors:0 dropped:0 overruns:0 frame:0
TX packets:191 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:19253 (18.8 KiB) TX bytes:19257 (18.8 KiB)
vif9.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.255
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:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
xenbr0 Link encap:Ethernet HWaddr 52:BE:57:00:3B:F9
inet addr:192.168.10.1 Bcast:0.0.0.0 Mask:255.255.255.0
inet6 addr: fe80::50be:57ff:fe00:3bf9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5024 errors:0 dropped:0 overruns:0 frame:0
TX packets:7765 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:309573 (302.3 KiB) TX bytes:11085251 (10.5 MiB)
servidor:~# brctl show
bridge name bridge id STP enabled interfaces
xenbr0 8000.52be57003bf9 no tap0
tap1
#why tap0 and tap1?!?! I'm confused here, I didn't see it before, I don't
#think that it's correct, I will do some tests soon -but I prefer to have
#physical access to that machine before change bridges and some of the
#configuration network
----------
And then I can switch on DomU and setup 192.168.10.10 as address, and gateway
192.168.10.1.
After switch on DomU, from Dom0 I can ping 192.168.10.10, and from DomU I can
ping 192.168.10.1 (good!)
Then some manual NAT rules to be able to have intenret in DomU, in my case I
have:
---------
$IPTABLES -A FORWARD -s 192.168.10.0/24 -d 192.168.0.1 -j ACCEPT
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED \
-d 192.168.10.0/24 -j ACCEPT
$IPTABLES -t nat -A POSTROUTING -o eth1 -s 192.168.10.0/24 -j MASQUERADE
---------
And that's all that I needed!
I have had some pending question writing this email (why tap0 and tap1 is in
xenbr0? i think that it's a mistake, only tap0 is needed). I hope that this
mail will be usefull for somebody. Else, I have all information.
Thanks to everybody who helped/gave some ideas, specially Max E. Baro.
--
Carles Pina i Estany GPG id: 0x8CBDAE64
http://pinux.info Manresa - Barcelona
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