Xen users - Apr 2010 - Multiple NIC interfaces on different subnets

We have multiple /24 networks here and I need to be able to have machines on at
least 2 or 3 of the ranges. The server has 4 NIC ports I can use if needed. What
would be the best way to get these /24''s accessible on this machine? I
have looked at the http://wiki.xensource.com/xenwiki/XenNetworking page, but I
am more lost now! All of my Xen usage up to this point has been on ubuntu 8.04
using Xen version 3.2.1-rc1-pre without libvirt undoubtedly. I tried setting the
vlan to the proper one on the switch and plugging another ethernet cable in to
the port on the server and "ifup eth1". Then "brctl show"
showed the interface but no vif or tap device for it. As shown here:

[root@xen domains]# brctl show
bridge name     bridge id               STP enabled     interfaces
eth0            8000.002564f952c3       no              tap4.0
                                                        vif4.0
                                                        vif3.0
                                                        peth0
eth1            8000.002564f952c5       no              peth1
virbr0          8000.000000000000       yes
[root@xen domains]#

Also, my networking went wonky with that interface active and I was unable to
install any Domu''s. So I shut the interface down and all went back to
normal. Example of what I need to happen:

Xen Dom0 is currently running on 10.8.2.XXX
All Domu''s are currently running on same 10.8.2.XXX range
I need some Domu''s to be on the 10.8.3.XXX and 10.8.8.XXX range

Dom0 is running CentOS 5.4 with Xen 3.4.2 from the gitco repo''s. Thanks
in advance for any pointers.
-- 
 
Donny B.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Donny Brooks wrote:
>We have multiple /24 networks here and I need to be able to have 
>machines on at least 2 or 3 of the ranges. The server has 4 NIC 
>ports I can use if needed. What would be the best way to get these 
>/24''s accessible on this machine?
On mine I have network-script set to my-network-script, and 
my-network-script contains :

#!/bin/sh
dir=$(dirname "$0")
"$dir/network-bridge" "$@" vifnum=0 netdev=ethbak
bridge=ethbak
"$dir/network-bridge" "$@" vifnum=1 netdev=ethext
bridge=ethext
"$dir/network-bridge" "$@" vifnum=1 netdev=ethint
bridge=ethint

I can then attach any guest to any combination of bridges are required.
  Dom0 currently has an interface defined on each network, but I 
believe you can get round that with "if up" to make an interface 
active but without an IP.

This is on a Debian system.

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

So, since I am using libvirt with Xen 3.4.2, when I do a "virsh edit
domu" I will replace the line

<source bridge=''eth0''/>

with

<source bridge=''bridgename''/>

Correct? I am about ready to pull the trigger on this and get going. Thanks for
all the help thus far.
 
 
-- 
 
Donny B. 
 
On Monday, April 12, 2010 04:58 PM CDT, Simon Hobson
<linux@thehobsons.co.uk> wrote:
 
> Donny Brooks wrote:
> >We have multiple /24 networks here and I need to be able to have 
> >machines on at least 2 or 3 of the ranges. The server has 4 NIC 
> >ports I can use if needed. What would be the best way to get these 
> >/24''s accessible on this machine?
> 
> On mine I have network-script set to my-network-script, and 
> my-network-script contains :
> 
> #!/bin/sh
> dir=$(dirname "$0")
> "$dir/network-bridge" "$@" vifnum=0 netdev=ethbak
bridge=ethbak
> "$dir/network-bridge" "$@" vifnum=1 netdev=ethext
bridge=ethext
> "$dir/network-bridge" "$@" vifnum=1 netdev=ethint
bridge=ethint
> 
> I can then attach any guest to any combination of bridges are required.
>   Dom0 currently has an interface defined on each network, but I 
> believe you can get round that with "if up" to make an interface 
> active but without an IP.
> 
> This is on a Debian system.
> 
> -- 
> Simon Hobson
> 
> Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
> author Gladys Hobson. Novels - poetry - short stories - ideal as
> Christmas stocking fillers. Some available as e-books.
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
 
 


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users