RE: [Xen-devel] new /etc/xen/network script

Li Ge
2005-08-12T20:10:27Z

I modified the script based on what you suggested. Now after starting xend,
there is nothing changed in the output of ifconfig:

x235:~ # ifconfig
eth0      Link encap:Ethernet  HWaddr 00:09:6B:A5:B5:EE
          inet addr:9.3.192.65  Bcast:9.3.192.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5356 errors:0 dropped:0 overruns:0 frame:0
          TX packets:374 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:732337 (715.1 Kb)  TX bytes:48514 (47.3 Kb)
          Interrupt:29

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:36 errors:0 dropped:0 overruns:0 frame:0
          TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2880 (2.8 Kb)  TX bytes:2880 (2.8 Kb)

Also I can not even do xm list:

x235:~ # ps -ef|grep xend
root     22613     1  5 14:35 ?        00:00:00 python /usr/sbin/xend start
root     22614 22613  0 14:35 pts/0    00:00:00 python /usr/sbin/xend start
root     22615 22614  0 14:35 pts/0    00:00:00 python /usr/sbin/xend start
root     22616 22614  0 14:35 pts/0    00:00:00 python /usr/sbin/xend start
root     22617 22614  0 14:35 pts/0    00:00:00 python /usr/sbin/xend start
root     22618 22614  0 14:35 pts/0    00:00:00 python /usr/sbin/xend start
root     23070 10759  0 14:35 pts/0    00:00:00 grep xend
x235:~ # xm list
(111, ''Connection refused'')
Error: Error connecting to xend, is xend running?

Switching back to the original network script, the network works again.

Not sure if I catched all the changes that you suggested. Here is the diff
between the new network file you sent and my modified one:

123c123,124
<         brctl addbr ${bridge}
---
>         #brctl addbr ${bridge}
>       create_bridge ${bridge}
180c181,182
<       if ! ifdown ${netdev} ] ; then
---
>       which ifdown
>       if ! ifdown ${netdev} ; then
195,196c197,200
<       add_to_bridge ${bridge} vif0.0
<       add_to_bridge ${bridge} p${netdev}
---
>       #add_to_bridge ${bridge} vif0.0
>       #add_to_bridge ${bridge} p${netdev}
>       brctl addif ${bridge} vif0.0
>       brctl addif ${bridge} p${netdev}

Li





             "Ian Pratt"
             <m+Ian.Pratt@cl.c
             am.ac.uk>                                                  To
                                       Li Ge/Austin/IBM@IBMUS
             08/11/2005 05:17                                           cc
             PM                        <ian.pratt@cl.cam.ac.uk>,
                                       "xen-devel"
                                       <xen-devel@lists.xensource.com>,
                                       <xen-devel-bounces@lists.xensource.
                                       com>, <ian.pratt@cl.cam.ac.uk>
                                                                   Subject
                                       RE: [Xen-devel] new
                                       /etc/xen/network script










> Ok, I modifed the script. Here is the new result:
>
> After I started xend, the network connection of dom0 lost.

OK, this is interesting. It''s the same symptoms as the old script.

It looks like peth0 is receiving packets. Please confirm this with:
 tcpdump -i peth0

What''s odd is that there''s no xen-br0 showing up in ifconfig.
I''d expect
to see something like:

xen-br0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:949 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:54097 (52.8 Kb)  TX bytes:0 (0.0 b)

Can you post the output of ''brctl show''. You should see:

[root@commando-0 root]# brctl show
bridge name     bridge id               STP enabled     interfaces
xen-br0         8000.feffffffffff       no              vif0.0
                                                        peth0

Also, please can you try replacing the following lines:

-        add_to_bridge ${bridge} vif0.0
-        add_to_bridge ${bridge} p${netdev}
+        brctl addif ${bridge} vif0.0
+        brctl addif ${bridge} p${netdev}

and earlier:

+ create_bridge ${bridge}
- brctl addbr ${bridge}