RE: [Xen-users] Dedicate Nic's to DomU's

["Hans Pfeil" <HPfeil@xxxxxxx>]

Joe, yep I did make the file executable.  (didn't  know I had to until this 
morning.  A guy here at work showed me.  But it still didn't work)  I deduce 
that it's not working because when I open the virt manager and click "run" to 
start the virt server it automatically goes to pause.  It just sits there in 
pause mode.  When I change everything back, all is well.
Here is copy of the outputs you asked for.  Also, here are some of the other 
files that I have.  I've attached the xend-config.spx file.

# cat /etc/xen/scripts/multi-network-bridge
#!/bin/sh
dir=$(/etc/xen/scripts "$0")
"$dir/network-bridge" "$@" vifnum=1 bridge=xenbr1 netdev=eth1

Here is the config file for the virtual guest server:

ostype="oes2l"
name="XXXXXX"
memory=1024
vcpus=1
uuid="a1ee16a1-cd9b-2493-60cb-77aea298d8fa"
on_crash="destroy"
on_poweroff="destroy"
on_reboot="restart"
localtime=0
builder="linux"
bootloader="/usr/lib/xen/boot/domUloader.py"
bootargs="--entry=xvda2:/boot/vmlinuz-xenpae,/boot/initrd-xenpae"
extra="TERM=xterm "
disk=[ 'file:/var/lib/xen/images/Harrier/disk0,xvda,w', ]
vif=[ 'bridge=eth1, mac=00:16:3e:6f:e6:6a', ]
vfb=["type=vnc,vncunused=1"]


Usage: brctl [commands]
commands:
        addbr           <bridge>                add bridge
        delbr           <bridge>                delete bridge
        addif           <bridge> <device>       add interface to bridge
        delif           <bridge> <device>       delete interface from bridge
        setageing       <bridge> <time>         set ageing time
        setbridgeprio   <bridge> <prio>         set bridge priority
        setfd           <bridge> <time>         set bridge forward delay
        sethello        <bridge> <time>         set hello time
        setmaxage       <bridge> <time>         set max message age
        setpathcost     <bridge> <port> <cost>  set path cost
        setportprio     <bridge> <port> <prio>  set port priority
        show                                    show a list of bridges
        showmacs        <bridge>                show a list of mac addrs
        showstp         <bridge>                show bridge stp info
        stp             <bridge> {on|off}       turn stp on/off


 # ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0F:1F:04:0B:49
          inet addr:xxx.xxx.xxx.xx  Bcast:xxx.xxx.xxx.xx  Mask:255.255.255.0
          inet6 addr: fe80::20f:1fff:fe04:b49/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:597 errors:0 dropped:0 overruns:0 frame:0
          TX packets:214 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:54601 (53.3 Kb)  TX bytes:19415 (18.9 Kb)
          Interrupt:17

eth1      Link encap:Ethernet  HWaddr 00:0F:1F:04:0B:4A
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:18

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:465 errors:0 dropped:0 overruns:0 frame:0
          TX packets:465 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:29962 (29.2 Kb)  TX bytes:29962 (29.2 Kb)



>>> "Joseph L. Casale" <JCasale@xxxxxxxxxxxxxxxxx> 6/9/2008 10:43 AM >>>
Well, I have not actually tested a config with it not configured, so I don't 
know for certain:)
I am not a Linux Bridge Utils guru, but I rembered from a vmware server kb 
article that you
could confiugure a NIC with an IP of 0.0.0.0 to prevent traffic getting the 
host, then unless
there is some specific requirement to Bridging, as long as the guests where in 
the same subnet
they would see each other, someone feel free to CMIIW.

I also neglected to mention I thiink you need to make the new script (mine is 
multi-network-bridge)
executable, just check your existing network-bridge script. Your logs will tell 
all.

What does # brctl show output? What does #ifconfig output?

How do you deduce its not working, I presume you are trying to communicate 
between two guests
that are in this bridge?

jlc

________________________________________
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
[xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Hans Pfeil 
[HPfeil@xxxxxxx] 
Sent: Monday, June 09, 2008 8:49 AM
To: xen-users@xxxxxxxxxxxxxxxxxxx 
Subject: [Xen-users] Dedicate Nic's to DomU's

Hey Joe, thanks for all your help and effort on this.  Unfortunately I couldn't 
get it to work.  Allow me to ask a question.   Does the actual physical nic, 
I'll call eth1, need to be configured with an IP address, routing, and host 
name first?  Right now I have eth1 with nothing configured.

Thanks
-Hans



>Don't happen to have an example of all this stuff do you?  This way I could 
>just copy it over to my side.  >Thanks.
>
>-Hans

I can provide you with the files I use, but without a minimal understanding of 
it, you'll be
hard pressed to make it work for your environment anyway.

I must suggest a good book I am just wrapping it up. One of the list members, 
Todd Deshane
has co-authored *the* most excellent book on Xen, Running Xen. It not only 
details everything
you need to know to run xen, it walks you through everything step by step to do 
things correctly
and it does this most thoroughly! You will be very comfortable running xen 
after this book!

I am running 3.2.0 on this host, so the bridge names are identical to the 
original eth names.
That most certainly could be different from your version, check your docs.

You need to edit /etc/xen/xend-config.sxp
-Locate the line: (network-script network-bridge)
-Make it say something like: (network-script multi-network-bridge)
-Now create a script in /etc/xen/scripts called multi-network-bridge

# cat /etc/xen/scripts/multi-network-bridge
#!/bin/sh
dir=$(dirname "$0")
"$dir/network-bridge" "$@" vifnum=0 netdev=eth0 bridge=eth0
"$dir/network-bridge" "$@" vifnum=1 netdev=eth1 bridge=eth1
.
.
.
"$dir/network-bridge" "$@" vifnum=n netdev=ethn bridge=ethn

Now you edit the config for your guests, usually located in /etc/xen but you can
the docs for your distro or follow one of many tutorials available.
-You will see, or need to add a line:
vif = [ 'bridge=eth0, mac=00:16:3E:77:A5:D6', ]
-This will create one nic in the guest, and add it to the bridge named eth0 
which
contains the original eth0 physical nic in the xen server.

Good luck,
jlc


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Attachment: xend-config.sxp
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