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xen-users
[Xen-users] DomU network issues
Hi all
Hopefully this will be the last of my issues... I'm using Xen 3.0.0 (built
from the source tar ball) on RHEL4 on IBM HS20 blades with dual EM64T HT
Xeons. I want a simple network setup where all the domU guest OS's are on
the same subnet as the dom0 host and all of the domU's are visible to the
rest of the LAN devices.
I've only been able to connect to domO from a device on the LAN since adding
the below to /etc/rc.d/rc.local (following
http://lists.xensource.com/archives/html/xen-devel/2005-01/msg00418.html)
but I still can't connect to domU (vm1 from now on) at OSI layer 3 or above.
With respect to the link above, I found doing 'brctl addif xenbr0 eth0'
catastrophic to our network, like really really really bad m'kay.
>From any device on the LAN I can arping vm1 but ping, ssh, etc don't work.
The link above mentioned an iptables MASQ rule which I tried without
success.
Can anyone give me a pointer on this?
Thanks in advance
CC
/etc/xen/xend-config.sxp
------------------------
(xend-http-server yes)
(xend-relocation-server yes)
(xend-address localhost)
(xend-relocation-address localhost)
(network-script network-bridge)
(vif-script vif-bridge)
(dom0-min-mem 196)
(dom0-cpus 0)
/etc/xen/vm1
------------
kernel = "/boot/vmlinuz-2.6-xen"
ramdisk = "/boot/initrd-2.6-xenU.img"
memory = 256
name = "vm1"
vcpus = 2
nics=1
vif = [ 'mac=aa:00:00:00:00:10, bridge=xenbr0' ]
disk = [ 'phy:rootvg/xen_vm1,sda1,w' ]
ip = "x.x.x.120"
netmask = "255.255.255.0"
gateway = "x.x.x.254"
hostname = "vm1"
root = "/dev/sda1 ro"
extra = "4"
on_crash = 'destroy'
xm list
-------
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 251 4 r----- 63.6
vm1 3 256 2 -b---- 6.6
/etc/xen/scripts/network-bridge status
--------------------------------------
============================================================
3: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:14:5e:3c:41:98 brd ff:ff:ff:ff:ff:ff
inet x.x.x.114/24 brd x.x.x.255 scope global eth0
20: xenbr0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
inet x.x.x.114/24 brd x.x.x.255 scope global xenbr0
bridge name bridge id STP enabled interfaces
xenbr0 8000.feffffffffff no peth0
vif0.0
vif3.0
x.x.x.0/24 dev eth0 proto kernel scope link src x.x.x.114
x.x.x.0/24 dev xenbr0 proto kernel scope link src x.x.x.114
169.254.0.0/16 dev eth0 scope link
default via x.x.x.254 dev xenbr0
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
x.x.x.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
x.x.x.0 0.0.0.0 255.255.255.0 U 0 0 0
xenbr0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 x.x.x.254 0.0.0.0 UG 0 0 0
xenbr0
============================================================
/etc/rc.d/rc.local
------------------
/sbin/ip route del default via x.x.x.254 dev eth0
/sbin/service xend start
/sbin/ip addr add x.x.x.114/24 brd x.x.x.255 scope global dev xenbr0
/sbin/ip route add default via x.x.x.254 dev xenbr0
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