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Bridges
A short note on bridges and how they are used in Oracle VM Manager and server
OnOracle VM server, at boot time, we create a bridge for each physical adaptor that is present in the system:
if you have eth0,1,2 you will get bridges named xenbr0, xenbr1,xenbr2
so for each ethXX there is xenbrXX
When you create a virtual machine, you need to tell the system which physical network the virtual interface can use. The virtual interface (vif) needs to be bound to a bridge.Oracle VM manager queries the bridge names from the Oracle VM server through the agent and gives you a list to pick from. This list then just contains the xenbrXX names.
if you want to know where they are bound, you can look at the local console of the Oracle VM server and it will tell you which bridge is attached to which eth and also the mac address so you can find out which physical port. or you can do cat /etc/issue or you can run ifconfig commands or brctl show and so forth.
In the future we intend to make it possible to name your own bridges so that its more clear instead of using just xenbrXX.
OnOracle VM server, at boot time, we create a bridge for each physical adaptor that is present in the system:
if you have eth0,1,2 you will get bridges named xenbr0, xenbr1,xenbr2
so for each ethXX there is xenbrXX
When you create a virtual machine, you need to tell the system which physical network the virtual interface can use. The virtual interface (vif) needs to be bound to a bridge.Oracle VM manager queries the bridge names from the Oracle VM server through the agent and gives you a list to pick from. This list then just contains the xenbrXX names.
if you want to know where they are bound, you can look at the local console of the Oracle VM server and it will tell you which bridge is attached to which eth and also the mac address so you can find out which physical port. or you can do cat /etc/issue or you can run ifconfig commands or brctl show and so forth.
In the future we intend to make it possible to name your own bridges so that its more clear instead of using just xenbrXX.
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, Jan 3 2008, 2:07 PM EST
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| Started By | Thread Subject | Replies | Last Post | ||
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| chandu.komali | Can we bind multiple domains to the same bridges? | 2 | May 16 2008, 10:43 AM EDT by fontec938 | ||
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Thread started: Mar 28 2008, 2:17 AM EDT
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Have question here. Say, eth0 is bound to xenbr0, eth1 is to xenbr1 and eth2 is to xenbr2. Can I create multiple domains where each domain accessing to all the bridges? For eg, xen1 points to eth0, xen1-vlan1 points to eth1 xen1-vlan2 points to xenbr2 with three different IP addresses. Now, can I create xen2 on the same VM server by using all the eth cards binding to xen2, xen2-vlan1 and xen2-vlan2 all pointing to a different set of IP addresses?
In short, my VM has got three Ethernet cards. I would like to create 5-6 domains all use the same Ethernet cards. Is this possible? |
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