Re: [Xen-users] xen 3.1 network configuration problem

[oturpin@xxxxxxx]

Hello,

I set up an @IP for xenbr0 because I do not use a DHCP server on my LAN, so I
need to give a manual config for IP.

This morning, I tried to remove the xend service from the init of Mandriva, for
testing network before xend is started. here are the strange results:
1) ping of the default gateway 192.168.0.1 is ok
2) service xend start and xendomains ok
3) ping of the default gateway NOK and ping of the domU NOK
4) service xend stop
5) ping of then default gateway NOK
6) service xend start
7) ping of default gateway OK AND ping of the domUs OK.

With that sequence , the network seems to operate correctly.

I wonder if there is a racing condition somewhere which is not fulfilled when
the xend service is started in init scripts.

Thx for your help.

> TURPIN Olivier wrote:
> > Hello,
> >
> > I am trying to use XEN networking as default : bridge xenbr0 with
> > ethernet adaptor eth0. As soon as xend is started , xenbr0 does not
> > activate and eth0 seems to run as if no bridge were preent.
> >
> > Here is my config file:
> > # To bridge network traffic, like this:
> > #
> > # dom0: fake eth0 -vif0.0 -+
> > #                            |
> > #                          bridge -real eth0 -the network
> > #                            |
> > # domU: fake eth0 -vifN.0 -+
> > #
> > # use
> > #
> > # (network-script network-bridge)
> > #
> > # Your default ethernet device is used as the outgoing interface, by
> > default.
> > # To use a different one (e.g. eth1) use
> > #
> > # (network-script 'network-bridge netdev=eth1')
> > #
> > # The bridge is named xenbr0, by default.  To rename the bridge, use
> > #
> > # (network-script 'network-bridge bridge=<name>')
> > #
> > # It is possible to use the network-bridge script in more complicated
> > # scenarios, such as having two outgoing interfaces, with two bridges,
> > and
> > # two fake interfaces per guest domain.  To do things like this, write
> > # yourself a wrapper script, and call network-bridge from it, as
> > appropriate.
> > #
> > (network-script 'network-bridge bridge=xenbr0 netdev=eth0')
> >  # The script used to control virtual interfaces.  This can be overridden
> > on a
> > # per-vif basis when creating a domain or a configuring a new vif.  The
> > # vif-bridge script is designed for use with the network-bridge script,
> > or
> > # similar configurations.
> > #
> > # If you have overridden the bridge name using
> > # (network-script 'network-bridge bridge=<name>') then you may wish to do
> > the
> > # same here.  The bridge name can also be set when creating a domain or
> > # configuring a new vif, but a value specified here would act as a
> > default.
> > #
> > # If you are using only one bridge, the vif-bridge script will discover
> > that,
> > # so there is no need to specify it explicitly.
> > #
> > (vif-script 'vif-bridge bridge=xenbr0')
> >  -------------------------------------------------------------
> >
> >  An ifconfig gives the following:
> >
> >  eth0      Link encap:Ethernet  HWaddr 9E:34:72:FC:1B:00
> >          inet adr:192.168.0.3  Bcast:192.168.0.255  Masque:255.255.255.0
> >          adr inet6: fe80::9c34:72ff:fefc:1b00/64 Scope:Lien
> >          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >          RX packets:13 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 lg file transmission:0
> >          RX bytes:2727 (2.6 KiB)  TX bytes:4357 (4.2 KiB)
> >  lo        Link encap:Boucle locale
> >          inet adr:127.0.0.1  Masque:255.0.0.0
> >          adr inet6: ::1/128 Scope:Hôte
> >          UP LOOPBACK RUNNING  MTU:16436  Metric:1
> >          RX packets:882 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:882 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 lg file transmission:0
> >          RX bytes:44100 (43.0 KiB)  TX bytes:44100 (43.0 KiB)
> >  peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >          adr inet6: fe80::fcff:ffff:feff:ffff/64 Scope:Lien
> >          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
> >          RX packets:260 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:363 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 lg file transmission:1000
> >          RX bytes:39940 (39.0 KiB)  TX bytes:35555 (34.7 KiB)
> >          Interruption:16 Adresse de base:0x6000
> >  vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >          adr inet6: fe80::fcff:ffff:feff:ffff/64 Scope:Lien
> >          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
> >          RX packets:24 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 lg file transmission:0
> >          RX bytes:4357 (4.2 KiB)  TX bytes:2797 (2.7 KiB)
> >  xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >          inet adr:192.168.0.20  Bcast:192.168.0.255  Masque:255.255.255.0
> >          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >          RX packets:24 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 lg file transmission:0
> >          RX bytes:4021 (3.9 KiB)  TX bytes:2979 (2.9 KiB)
> >
> > -------------------------------------------------------
> >
> > Here is the result of the command:
> >
> > bridge name     bridge id               STP enabled     interfaces
> > xenbr0          8000.feffffffffff       no              vif0.0
> >                                                        peth0
> >
> > I enclosed the log files generated by xen for the command  line :
> > service xend start :
> >
> > I have no idea of the reason why the xen network does not start. (Do I
> > need a package which is not present ?)
> >
> > If anyone could give a way where to investigate ...
> >
> > Thx a lot
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
>
> As far as I see the ifconfig command says that the bridge is there?
> The eth0 is normal. I only dont know why you have ip address assigned
> for xenbr0?
>
> I dont see anything bad on your configuration. Tell us what does not work?
>
> For domU you have to then specify the bridge in domU config.
>
> For comparison here is mine with more bridges.
>
> eth0      Link encap:Ethernet  HWaddr 00:14:C2:3A:AB:63
>            inet addr:192.168.30.11  Bcast:192.168.30.255  Mask:255.255.255.0
>            inet6 addr: fe80::214:c2ff:fe3a:ab63/64 Scope:Link
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:24989 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:17339 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:2253137 (2.1 MiB)  TX bytes:3373292 (3.2 MiB)
>
> 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:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>
> peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>            inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>            UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>            RX packets:24972 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:17349 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:2351825 (2.2 MiB)  TX bytes:3443564 (3.2 MiB)
>            Interrupt:20
>
> peth1     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>            inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>            UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>            RX packets:126737 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:106149 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:44011994 (41.9 MiB)  TX bytes:84835611 (80.9 MiB)
>            Interrupt:18
>
> vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>            inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>            UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>            RX packets:17339 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:24989 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:3373292 (3.2 MiB)  TX bytes:2253137 (2.1 MiB)
>
> vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>            inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>            UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:1127 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:0 (0.0 b)  TX bytes:127247 (124.2 KiB)
>
> vif18.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>            inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>            UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>            RX packets:97626 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:112923 errors:0 dropped:77 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:81439022 (77.6 MiB)  TX bytes:39929936 (38.0 MiB)
>
> 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:550 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:74036 (72.3 KiB)  TX bytes:0 (0.0 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 NOARP  MTU:1500  Metric:1
>            RX packets:938 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:96030 (93.7 KiB)  TX bytes:0 (0.0 b)
>
> Jiri
>



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