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Russell Horn

2008-Jan-11 02:51 UTC

[Xen-users] Xen creating two bridges

Hi,

I''m trying to set up networking on a new machine.

I''m not getting any networking from the domU''s

I notice that I have two bridges being created:

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)

Any idea why that would be?

/etc/xen/xend-config.sxp only contains this:

(xend-relocation-server yes)
(xend-relocation-hosts-allow ''^localhost$'')
(network-script ''network-bridge netdev=eth0'')
(vif-script vif-bridge)
(dom0-min-mem 196)
(dom0-cpus 0)

I''m configuring networking for the domU with this line:
vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]

Any idea why I''m seeing two bridges and if that might point to why
I''m
not getting any network throughput on my virtual machines?

Thanks,

Russell

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

Wayne Mallett

2008-Jan-11 03:59 UTC

head link

Re: [Xen-users] Xen creating two bridges

I think you should have something like
vif = [ ''bridge=xenbr0,mac=...'',
''bridge=xenbr1,mac=...'' ]
replacing ... with mac addresses.

Regards,
Wayne

On 11/01/2008, at 12:51 PM, Russell Horn wrote:
> Hi,
>
> I''m trying to set up networking on a new machine.
>
> I''m not getting any networking from the domU''s
>
> I notice that I have two bridges being created:
>
> xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>           RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)
>
> xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:44 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)
>
> Any idea why that would be?
>
> /etc/xen/xend-config.sxp only contains this:
>
> (xend-relocation-server yes)
> (xend-relocation-hosts-allow ''^localhost$'')
> (network-script ''network-bridge netdev=eth0'')
> (vif-script vif-bridge)
> (dom0-min-mem 196)
> (dom0-cpus 0)
>
> I''m configuring networking for the domU with this line:
> vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]
>
> Any idea why I''m seeing two bridges and if that might point to why
I''m
> not getting any network throughput on my virtual machines?
>
> Thanks,
>
> Russell
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
Dr. Wayne Mallett
High Perf. & Research Computing Support
Information Technology & Resources
James Cook University
Townsville  Qld  4811
Australia

Ph (int):  5084
Ph (ext) :  07 4781 5084
Email:  Wayne.Mallett@jcu.edu.au




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http://lists.xensource.com/xen-users

Alain BARTHE

2008-Jan-11 08:27 UTC

head link

RE [Xen-users] Xen creating two bridges

You have two bridges probably because you have two network IF, eth0 and 
eth1, do you ?

If you did not make a typo by writing this mail, the syntax of your domU 
network config seems to be wrong:

not   vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]
but rather   vif=[ ''mac=00:16:3e:6a:b4:43, bridge=xenbr0'' ]

Hope this help.

Alain.

xen-users-bounces@lists.xensource.com a écrit sur 11/01/2008 03:51:45 :
> Hi,
> 
> I''m trying to set up networking on a new machine.
> 
> I''m not getting any networking from the domU''s
> 
> I notice that I have two bridges being created:
> 
> xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>           RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)
> 
> xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:44 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)
> 
> Any idea why that would be?
> 
> /etc/xen/xend-config.sxp only contains this:
> 
> (xend-relocation-server yes)
> (xend-relocation-hosts-allow ''^localhost$'')
> (network-script ''network-bridge netdev=eth0'')
> (vif-script vif-bridge)
> (dom0-min-mem 196)
> (dom0-cpus 0)
> 
> I''m configuring networking for the domU with this line:
> vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]
> 
> Any idea why I''m seeing two bridges and if that might point to why
I''m
> not getting any network throughput on my virtual machines?
> 
> Thanks,
> 
> Russell
> 
> _______________________________________________
> 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

Jordi Prats

2008-Jan-11 12:16 UTC

head link

Re: [Xen-users] Xen creating two bridges

Hi,
Are these bridges attached to some interface?

brctl show should look like this:

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              eth0

xenbr1          8000.feffffffffff       no              eth1

regards,
Jordi



Russell Horn wrote:> Hi,
>
> I''m trying to set up networking on a new machine.
>
> I''m not getting any networking from the domU''s
>
> I notice that I have two bridges being created:
>
> xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>           RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)
>
> xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:44 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)
>
> Any idea why that would be?
>
> /etc/xen/xend-config.sxp only contains this:
>
> (xend-relocation-server yes)
> (xend-relocation-hosts-allow ''^localhost$'')
> (network-script ''network-bridge netdev=eth0'')
> (vif-script vif-bridge)
> (dom0-min-mem 196)
> (dom0-cpus 0)
>
> I''m configuring networking for the domU with this line:
> vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]
>
> Any idea why I''m seeing two bridges and if that might point to why
I''m
> not getting any network throughput on my virtual machines?
>
> Thanks,
>
> Russell
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
>
>   

-- 
......................................................................
         __
        / /          Jordi Prats
  C E / S / C A      Dept. de Sistemes
      /_/            Centre de Supercomputació de Catalunya

  Gran Capità, 2-4 (Edifici Nexus) · 08034 Barcelona
  T. 93 205 6464 · F.  93 205 6979 · jprats@cesca.es
...................................................................... 


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

Nick Couchman

2008-Jan-11 14:05 UTC

head link

Re: [Xen-users] Xen creating two bridges

I''ve found that I have better luck creating bridges when I use the
bridge facilities built in to Linux instead of the XEN ones.  For example, on
SuSE you can create an /etc/sysconfig/network/ifcfg-xenbr0 file and put
configuration directives in this file that tell Linux which interface(s) to put
in the bridge and even assign an IP or set DHCP on the bridge.  Most of my XEN
servers have multiple VLANs - usually five or six, so I''ve found that
doing this greatly simplifies the amount of configuration I have to do.
 
-Nick
>>> On 2008/01/10 at 19:51, "Russell Horn"
<albanach@gmail.com> wrote:Hi,

I''m trying to set up networking on a new machine.

I''m not getting any networking from the domU''s

I notice that I have two bridges being created:

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)

Any idea why that would be?

/etc/xen/xend-config.sxp only contains this:

(xend-relocation-server yes)
(xend-relocation-hosts-allow ''^localhost$'')
(network-script ''network-bridge netdev=eth0'')
(vif-script vif-bridge)
(dom0-min-mem 196)
(dom0-cpus 0)

I''m configuring networking for the domU with this line:
vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]

Any idea why I''m seeing two bridges and if that might point to why
I''m
not getting any network throughput on my virtual machines?

Thanks,

Russell




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

Gerhard Possler

2008-Jan-11 15:01 UTC

head link

Re: [Xen-users] Xen creating two bridges

Hi all,

you may use in the xend-config.sxp

(vif-script vif-bridge bridge=xenb0) 

or use scripts:

        brctl addbr xenintbr
                brctl setfd xenintbr 0
                brctl sethello xenintbr 0
                brctl stp xenintbr off

                echo "IP adress of xen bridge is 10.0.0.1"
                      ifconfig xenintbr 10.0.0.1 netmask 255.255.255.0 up
                      echo 1 > /proc/sys/net/ipv4/ip_forward

Mit freundlichen Grüßen / with kind regards 

Gerhard Possler
IT Architect
IBM Enterprise Linux Services
ELS Wiki@IBM (only accessible via IBM intranet) 
IT-Services and Solutions GmbH
Rathausstr. 7, D-09111 Chemnitz
Geschäftsführung: Rainer Laier, Michael Mai
Sitz der Gesellschaft: Chemnitz
Registergericht: Amtsgericht Chemnitz, HRB 18409
http://www.itsas.de/ 
gerhard.possler@de.ibm.com
Mobil +49 (0) 160 90578637




"Nick Couchman" <Nick.Couchman@seakr.com> 
Sent by: xen-users-bounces@lists.xensource.com
11.01.2008 15:05

To
"Russell Horn" <albanach@gmail.com>,
<xen-users@lists.xensource.com>
cc

Subject
Re: [Xen-users] Xen creating two bridges






I''ve found that I have better luck creating bridges when I use the
bridge
facilities built in to Linux instead of the XEN ones.  For example, on 
SuSE you can create an /etc/sysconfig/network/ifcfg-xenbr0 file and put 
configuration directives in this file that tell Linux which interface(s) 
to put in the bridge and even assign an IP or set DHCP on the bridge. Most 
of my XEN servers have multiple VLANs - usually five or six, so I''ve
found
that doing this greatly simplifies the amount of configuration I have to 
do.
 
-Nick
>>> On 2008/01/10 at 19:51, "Russell Horn"
<albanach@gmail.com> wrote:Hi,

I''m trying to set up networking on a new machine.

I''m not getting any networking from the domU''s

I notice that I have two bridges being created:

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)

Any idea why that would be?

/etc/xen/xend-config.sxp only contains this:

(xend-relocation-server yes)
(xend-relocation-hosts-allow ''^localhost$'')
(network-script ''network-bridge netdev=eth0'')
(vif-script vif-bridge)
(dom0-min-mem 196)
(dom0-cpus 0)

I''m configuring networking for the domU with this line:
vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]

Any idea why I''m seeing two bridges and if that might point to why
I''m
not getting any network throughput on my virtual machines?

Thanks,

Russell

_______________________________________________
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

Nick Couchman

2008-Jan-11 15:29 UTC

head link

Re: [Xen-users] Xen creating two bridges

This works great for adding a new domU or HVM to a particular bridge,
but setting up the bridges to begin with can be a bit challenging. 
I''ve
found using Sysconfig is easier, especially with VLANs and they seem to
confuse the XEN scripts that do the bridge setup. 

-Nick
>>> On Fri, Jan 11, 2008 at  8:01 AM, Gerhard Possler<gerhard.possler@de.ibm.com> wrote:

Hi all,

you may use in the xend-config.sxp

(vif-script vif-bridge bridge=xenb0) 

or use scripts:

        brctl addbr xenintbr
                brctl setfd xenintbr 0
                brctl sethello xenintbr 0
                brctl stp xenintbr off

                echo "IP adress of xen bridge is 10.0.0.1"
                      ifconfig xenintbr 10.0.0.1 netmask 255.255.255.0
up
                      echo 1 > /proc/sys/net/ipv4/ip_forward

Mit freundlichen Grüßen / with kind regards

Gerhard Possler
IT Architect
IBM Enterprise Linux Services
ELS Wiki ( http://w3.webahead.ibm.com/w3ki/display/ELSde )@IBM (only
accessible via IBM intranet) 
IT-Services and Solutions GmbH
Rathausstr. 7, D-09111 Chemnitz
Geschäftsführung: Rainer Laier, Michael Mai
Sitz der Gesellschaft: Chemnitz
Registergericht: Amtsgericht Chemnitz, HRB 18409
http://www.itsas.de/ 
gerhard.possler@de.ibm.com
Mobil +49 (0) 160 90578637 

"Nick Couchman" <Nick.Couchman@seakr.com> 
Sent by: xen-users-bounces@lists.xensource.com 
11.01.2008 15:05 

To 

"Russell Horn" <albanach@gmail.com>,
<xen-users@lists.xensource.com>

cc 

Subject 

Re: [Xen-users] Xen creating two bridges 

I''ve found that I have better luck creating bridges when I use the
bridge facilities built in to Linux instead of the XEN ones.  For
example, on SuSE you can create an /etc/sysconfig/network/ifcfg-xenbr0
file and put configuration directives in this file that tell Linux which
interface(s) to put in the bridge and even assign an IP or set DHCP on
the bridge.  Most of my XEN servers have multiple VLANs - usually five
or six, so I''ve found that doing this greatly simplifies the amount of
configuration I have to do.

-Nick
>>> On 2008/01/10 at 19:51, "Russell Horn"
<albanach@gmail.com> wrote:Hi,

I''m trying to set up networking on a new machine.

I''m not getting any networking from the domU''s

I notice that I have two bridges being created:

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
         UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
         RX packets:3024 errors:0 dropped:0 overruns:0 frame:0
         TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:1802480 (1.7 Mb)  TX bytes:258 (258.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:44 errors:0 dropped:0 overruns:0 frame:0
         TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:1232 (1.2 Kb)  TX bytes:468 (468.0 b)

Any idea why that would be?

/etc/xen/xend-config.sxp only contains this:

(xend-relocation-server yes)
(xend-relocation-hosts-allow ''^localhost$'')
(network-script ''network-bridge netdev=eth0'')
(vif-script vif-bridge)
(dom0-min-mem 196)
(dom0-cpus 0)

I''m configuring networking for the domU with this line:
vif=[ ''mac=00:16:3e:6a:b4:43'',
''bridge=xenbr0'' ]

Any idea why I''m seeing two bridges and if that might point to why
I''m
not getting any network throughput on my virtual machines?

Thanks,

Russell

_______________________________________________
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

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