Hi Ferreira,
Am Montag, den 30.03.2009, 14:43 +0200 schrieb Ferreira, N. L. (Nuno):
> Hi *
>
> First of all, let me say that I have almost no knowledge about how
> networks works. I must fill this gap soon.
> So, don't feel obliged to completely answer my question(s). I only
> expect some tips/clues to start with.
>
> What I have:
> 1) A dom0 server with 2 NIC cards (eth0, eth1), running centOS52 xen
> 3.2.
> 2) A switch to a VLAN with several physical machines (already up and
> running).
>
> What I need:
> 1) A domU with a static IP and also connected to the VLAN.
you need to write your own networking-script to use 2 bridges.
# vim /etc/xen/scripts/network-2nics
#!/bin/bash
/etc/xen/scripts/network-bridge $1 netdev=eth0 bridge=xenbr0 vifnum=0
/etc/xen/scripts/network-bridge $1 netdev=eth1 bridge=xenbr1 vifnum=1
# chmod a+x /etc/xen/scripts/network-2nics
edit xend-confix.sxp
and finally restart xend.
To use 2 bridges/NICs into your guests, just use something like:
vif = [
'ip=xxx.yyy.zzz.228,mac=00:01:ad:13:04:05,bridge=xenbr0','ip=10.0.57.228,mac=00:16:3E:3C:B3:FC,bridge=xenbr1'
]
> My plan:
> 1) use dom0 eth0 to connect to the outside world; domU will use it also
> to connect to the outside (this is the default anyway).
> 2) use dom0 eth1 to connect domU to the switch connected to the VLAN.
>
> Do not know if this makes much sense, it makes to me at least,.
So:
- do you want to NATting in dom0? ---> use network-nat ;)
- Or do you want a router in domU ---> follow the above :-)
>
> My progress:
> Till now, all my created domU's (each with a static IP) were connecting
> to the web through xenbr0. The second NIC on dom0 was not being used at
> all. The xen config file pointed to xenbr0, and I only had to change
> inside the domU the network configurations (/etc/sysconfig/network and
> /etc/sysconfig/network-scripts-eth0). An ifconfig on the host shows me
> the following network components (deleted not so important stuff):
>
> [root@dom0 ~]# ifconfig
> eth0 Link encap:Ethernet HWaddr 00:E0:81:4D:30:D0
.... it's not a good idea to post your public-ips :-)
> xenbr1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
>
>
> So it seems that the dom0 is well configured, both to the outside world
> and to the VLAN. Though I thought 2 xen bridges should appear ... one
> for each NIC card?
yap, but the standard-network-script wont do this 4 you.
>
> I booted a domU (after changing in the xen cfg file xenbr0 to xenbr1)
> created is this machine (when the eth1 was still inactivated) and I had
> problems because Kudzu detected a change in the network configuration.
> So probably, I should create the domU when both dom0 NIC cards are
> active, right?
yap. if i understand you right, you wand to use a domU as router?
So you need _a_ domU with 2 nics (connected to internal _and_ external
bridge), whcich does the job for you.
>
> How can I accomplish my 2 goals above on "My plans" section?
> Any insights for me to start playing?
>
> Sorry for such long e-mail, and thanks for your reading.
> Cheers,
> N.
hth,
Thomas
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