RE: [Xen-users] bridge-utils problem

[Tommy Huang <tommy24@xxxxxxxx>]

Hi,

It seems that I didn't set bridging correctly.
I was trying to create DomU using the bridge. However, it failed.
I add something like "vif = [ 'bridge=xenbr0' ]" to the DomU configuration file.
When I create the domain, it said 
Error: Device 0 (vif) could not be connected. Hotplug scripts not working.
Error: Domain 'sample-xen-domain' does not exist.
I have checked other posts but didn't get the solutions.
Also, I don't know that why I don't have the interface vif0.0 and peth0.
I type ifconfig -a but none of them are listed.
Here is the output of "network-bridge status"

2: eth0:  mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:30:48:63:72:76 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::230:48ff:fe63:7276/64 scope link
       valid_lft forever preferred_lft forever
4: xenbr0:  mtu 1500 qdisc noqueue
    link/ether 00:30:48:63:72:76 brd ff:ff:ff:ff:ff:ff
    inet 143.215.206.12/22 brd 143.215.207.255 scope global xenbr0
    inet6 fe80::200:ff:fe00:0/64 scope link
       valid_lft forever preferred_lft forever

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.003048637276       no              eth0

143.215.204.0/22 dev xenbr0  proto kernel  scope link  src 143.215.206.12
127.0.0.0/8 dev lo  scope link
default via 143.215.204.1 dev xenbr0

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
143.215.204.0   0.0.0.0         255.255.252.0   U     0      0        0 xenbr0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         143.215.204.1   0.0.0.0         UG    0      0        0 xenbr0

And my ifconfig output:
eth0      Link encap:Ethernet  HWaddr 00:30:48:63:72:76
          inet6 addr: fe80::230:48ff:fe63:7276/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:63643 errors:0 dropped:0 overruns:0 frame:0
          TX packets:53819 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7907265 (7.5 Mb)  TX bytes:46213243 (44.0 Mb)
          Base address:0x2000 Memory:d8020000-d8040000

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:191997 errors:0 dropped:0 overruns:0 frame:0
          TX packets:191997 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:240379493 (229.2 Mb)  TX bytes:240379493 (229.2 Mb)

xenbr0    Link encap:Ethernet  HWaddr 00:30:48:63:72:76
          inet addr:143.215.206.12  Bcast:143.215.207.255  Mask:255.255.252.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:63516 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33764 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:6692348 (6.3 Mb)  TX bytes:44836115 (42.7 Mb)

Any response is appreciated. Thanks.
Regards,
- Tommy

----------------------------------------
> From: tommy24@xxxxxxxx
> To: stefan.bauer@xxxxxxxxxxx; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] bridge-utils problem
> Date: Mon, 22 Sep 2008 11:22:48 -0700
> CC: 
> 
> 
> Hi,
> 
> Thanks for all your suggestions.
> Finally I found the problem that the interface xenbr0 cannot get the IP 
> automatically.
> Here is the procedure that I did:
> 
> #since dhcpcd starts when eth0 is running, I shut down it.
> kill [pid of dhcpcd]
> ifconfig eth0 0.0.0.0 
> dhclient xenbr0
> 
> Without shutdown the dhcpcd which has been run by eth0, dhclient cannot get 
> the IP for xenbr0.
> But I still don't know why this would happen. Did I miss setting anything?
> I follow the procedure of the following website which provides solutions in 
> general cases (not XEN). 
> http://www.linuxfoundation.org/en/Net:Bridge
> I am still wondering what is the right procedure to set IP for xenbr0 while 
> fetching IP from DHCP?
> Any response is appreciated. Thanks in advance.
> 
> Regards,
> - Tommy
> 
> ----------------------------------------
>> Date: Mon, 22 Sep 2008 19:51:36 +0200
>> From: stefan.bauer@xxxxxxxxxxx
>> To: xen-users@xxxxxxxxxxxxxxxxxxx
>> Subject: Re: [Xen-users] bridge-utils problem
>> 
>> * Tommy Huang  [22.09.2008 19:15]:
>>> I found that once I "ifdown xenbr0". Then the machine can connect to the 
>>> Internet immediately.
>>> By the way, I allow all traffic in iptables. So the firewall should not be 
>>> problem now.
>>> Any thought? Thanks in advance.
>> 
>> That sounds like a routing problem. Probably more than one default route
>> is active. That can be confirmed by doing a route -n while xenbr0 is up.
>> there should only be one entry beginning with 0.0.0.0.
>> 
>> Regards
>> 
>> --
>> stefan
>> 
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-users
> 
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