How to configure multiple IP addresses on one NIC?
Hi,
I just installed a OVM Server in version 3.2.1 and the according VMManager. Now i wanted to try to configure the Server/Server Pool. Now i come across a problem, which was already a big problem in OVM 2 while configuring the Networks.
All our OVM Servers have three NICs in them. One is for VMs and Management, the others are for connection to our SAN (Dell PowerVault MD 3220i). My problem is, that due to the network setup, the two NICs for storage need two IP addresses in two different networks each. This shouldn't be a problem, because usually in linux all you have to do is configure something like eth1:1. I remember having huge trouble configuring it in our OVM 2 cluster up to the point where I had to write a shell script to configure the second IP.
Anyways, I have configured two of the storage networks on eth1 and eth2 of the VM Server. Now i cannot configure any more IP addresses, because eth1 and eth2 are not available anymore for configuration in a third network. I really hoped that it would be possible in OVM 3 to configure multiple IP addresses. And probably it is only my lack of knowledge of how to configure it.
So any advice is well appreciated.
Thanks!
Regards,
Marek Hubatka
You should be able to do this by using "VLAN Groups".
http://docs.oracle.com/cd/E35328_01/E35332/E35332.pdf
Check out the VLAN groups section. You must great the VLAN groups before you can assign them to interfaces.
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we have some OVM Servers 2.2.1 installed. They all have three NICs in them (eth0-2). For eth0 and eth2 we need multiple IP-Adresses configured to work with our storage solution. The configuration should look like this:
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I can configure multiple ip addresses for xenbr0 by calling something like "ifconfig xenbr0 192.168.31.x". But these settings get lost as sonn as i reboot the server.
I have already searched google, forums and blogs for a solution but could not find one. I thought that this should be a pretty common task. In "normal" linux it is not an issue at all.
Has somebody any experience with a setup like this? I would really apreciate your help.
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configuring IP aliasses seems to work the same way like configuring VLANs. You will have to configure the appropriate bridges at system startup manually.
E.g. this little script is what I use to configure VLANs and briges on my OVM:
#!/bin/bash
echo "Configuring VLANs and bridges\n"
echo "Configuring VLAN 24 on eth2"
vconfig add eth2 24
brctl addbr br2.24
brctl addif br2.24 eth2.24
ifconfig eth2.24 up
ifconfig br2.24 up
echo "Configuring VLAN 31 on eth2"
vconfig add eth2 31
brctl addbr br2.31
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ifconfig br2.31 up
This script is run at startup by init using this startup skript in /etc/init.d, which is what I think you're missing as you can already seem to bring up the needed IPs manually - you'd have to change the chkconfig accordingly, that is make sure that the config script gets startet after the network has been brought up, like this: # chkconfig: 2345 11 91
[root@oraclevm01 ~]# cat /etc/init.d/vlan-config
#! /bin/bash
# vlan-config configure VLANs
# chkconfig: 2345 11 89
# description: Configures VLANs at boot time before the \
# network is started.
### BEGIN INIT INFO
# Provides: $vlan
### END INIT INFO
# Source function library.
. /etc/init.d/functions
if [ ! -f /etc/vlan-config ]; then
exit 0
fi
# See how we were called.
case $1 in
start)
# configure vlans
/etc/vlan-config
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exit 1
esac
exit 0
Hth,
budy
Edited by: budachst on Jun 29, 2011 8:11 AM -
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