[SOLVED] xen and trunking

genderbender · 11-12-2010, 05:49 AM

I have a xen server and need to setup a trunk allowing me to specify different IP's for each of the VM's connected. The port the dom0 is connected is already trunk aware.

What do I need to do to make this function properly? Are there any guides/walkthroughs?

alli_yas · 11-12-2010, 07:06 AM

What you need to setup is a network bridge from what I can gather.

Do a quick search of the this forum and you'll definitely find information on how to do this and setup Xen in the process.

genderbender · 11-12-2010, 07:09 AM

Can I not just make my eth0 interface vlan aware. Sounds like a bit of a bugger setting up bridges. I'll take a look though, cheers.

Code:

vconfig add eth0 100
vconfig add eth0 200
vconfig add eth0 300

Was what I had in mind, with bridging my host would do the routing (I think).

alli_yas · 11-12-2010, 07:15 AM

Hi

Not following how making eth0 vlan aware would solve the problem though?

You basically want each VM virtual NIC to share your physical network card; but assign (either dynamic/static) different IP's to these. Bridging really isn't that difficult to do. All you'd need to do is to install bridge-utils and do a bit of interface config.

This link is for setting up KVM on Fedora 10; but I've used a similar way of doing it on F13/F14 and it works perfectly - this will give you an idea of how to setup the bridge.

genderbender · 11-12-2010, 07:38 AM

Quote:

Originally Posted by alli_yas

Not following how making eth0 vlan aware would solve the problem though?

I want my switch to deal with intervlan communication, not the xen server. If my VM's have an obscure IP address, data will be forwarded out the virtual interface and sent to the dom0 interface which will push traffic to the switch to handle... I was hoping anyway. I've noticed when doing ifconfig -a that there's already - eth0, vif3.0 and xenbr0...

genderbender · 11-12-2010, 07:52 AM

This looks to be available in xencenter:
click your dom0>click the network tab>add network>external network>specify vlan number when prompted.