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Re: [Xen-users] xen networking on Debian with 2 nics
Hello Ian,
I got it working :
Dom0's /etc/network/interfaces:
----------------------------------------
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
auto eth1
iface eth1 inet manual
up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down
my eth1 looks like:
auto eth1
iface eth1 inet static
address 192.168.x.x
netmask 255.255.255.0
network 192.168.x.0
broadcast 192.168.x.255
# dns-* options are implemented by the resolvconf package, if
installed
dns-nameservers 192.168.x.x 192.168.x.y
dns-search my.domain
----------------------------------------
So I need 2 bridges (so I can get my vpn & firewall machines to allow
the right traffic in/out of our network).
So I run
/etc/xen/scripts/network start bridge=xen-br1 netdev=eth1 antispoof=no
Right?
Well I modified /etc/xen/scripts/network to:
....
bridge=${bridge:-xen-br0}
netdev=${netdev:-eth0}
antispoof=${antispoof:-yes}
bridge1=xen-br1
netdev1=eth1
...
case ${OP} in
start)
op_start
bridge=${bridge1}
netdev=${netdev1}
op_start
;;
stop)
op_stop
bridge=${bridge1}
netdev=${netdev1}
op_stop
;;
status)
show_status ${netdev} ${bridge}
;;
*)
echo 'Unknown command: ' ${OP}
echo 'Valid commands are: start, stop, status'
exit 1
esac
ifconfig -a shows 2 ethx and two bridges
the domU configurations looks like:
# Define network interfaces.
# Number of network interfaces. Default is 1.
nics=2
# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
#vif = [ 'mac=aa:00:00:00:00:11, bridge=xen-br0' ]
vif = [ 'bridge=xen-br0', 'bridge=xen-br1' ]
And it works then.
Good luck.
Reiner
When I run tcpdump on each of the bridge interfaces I see the expected
traffic for that interface.
Set up a VM with 2 nics with the following config file:
----------------------------------------
kernel = "/boot/vmlinuz-2.6-xenU-tun"
memory = 64
name = "vpn"
nics=2
root = "/dev/hda1 ro"
disk = [ 'phy:/dev/vg00/vpn,hda1,w', 'phy:/dev/vg00/vpnswap,hda2,w' ]
vif = [ 'mac=AA:00:00:07:C5:2C', 'bridge=xen-br0',
'mac=AA:00:00:07:C5:2D', 'bridge=xen-br1' ]
----------------------------------------
I start the VM up and ipconfig in the VM shows
----------------------------------------
eth0 Link encap:Ethernet HWaddr AA:00:00:07:C5:2C
inet addr:192.168.0.230 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:858 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:76754 (74.9 KiB) TX bytes:158 (158.0 b)
eth1 Link encap:Ethernet HWaddr AA:00:00:01:D2:48
inet addr:192.168.101.1 Bcast:192.168.101.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:861 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:76912 (75.1 KiB) TX bytes:0 (0.0 b)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 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)
----------------------------------------
Which shows a different mac address to the one I am expecting for eth1
as per the config file!! Is this the root of my problem?
So "brctl show" in Dom0 shows:
----------------------------------------
bridge name bridge id STP enabled interfaces
xen-br0 8000.0008a1349cdc no eth0
vif1.0
vif1.1
vif1.2
xen-br1 8000.0008a1349c9f no eth1
vif1.3
----------------------------------------
Which I think is ok! Can anyone confirm?
When in the VM I do a tcpdump on each of the 2 nics I see the same
traffic as if both interfaces are bridged with eth0 in Dom0, this is not
what I want.
I have attempted reinstalling Dom0 from scratch twice and have tried
building xen-testing from source but I get the same outcome. At this
point I am willing to try almost anything (with the exception of running
out and buying more hardware.)
I attempted to look for relevant posts to this mailing list, but
unfortunately I haven't found anything that appears relevant to my
problem. If I have missed stuff please don t flame :)
Any help would be most appreciated.
Regards
Ian
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