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[Xen-users] dom0 networking disabled

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] dom0 networking disabled
From: kbrown@xxxxxxxxxxxxx
Date: Thu, 15 Mar 2007 18:57:52 -0500 (CDT)
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Hi folks, I've been trying to work out this situation for a few days now
without much success and dug all over the archives for similar issues,
none of which seem to relate exactly.

I installed Debian Etch and the Xen (3.03) kernels / binaries on a Dell
server. It works fantastic with all the default configurations with one
strange flaw - as soon as the /etc/xen/scripts/network-bridge script runs,
dom0 loses all network connectivity. It is no longer possible to ping in
or out of the IP for the machine, and it throws no errors, just sits on a
blinking prompt.

I have 4 domU machines running on 4 different IPs and they all work
perfectly, with perfect connectivity. All the default configuration files
seem correct, and there are no firewall problems that I can see. Nothing
gets in or out of dom0, though, from anywhere. Running
'/etc/xen/scripts/network-bridge stop' will return eth0 to its former
state and everything starts working again.

So either I'm missing something very obvious, or something is very wrong -
I've attached several readouts below, but let me know if any other info
would be helpful in solving this thing, its had us stumped and seems to be
the only thing keeping us from putting this box into production.

Thanks for any insight,

Kirk



***** XEND-CONFIG *****

(network-script network-bridge)

(vif-script vif-bridge)

(dom0-min-mem 196)

(dom0-cpus 0)



***** IFCONFIG AFTER NETWORK-BRIDGE *****
eth0      Link encap:Ethernet  HWaddr 00:18:8B:30:42:1A
          inet addr:146.6.135.253  Bcast:146.6.135.255  Mask:255.255.255.0
          inet6 addr: fe80::218:8bff:fe30:421a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:428106 errors:0 dropped:0 overruns:0 frame:0
          TX packets:954 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:90445670 (86.2 MiB)  TX bytes:51940 (50.7 KiB)

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:84 errors:0 dropped:0 overruns:0 frame:0
          TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7619 (7.4 KiB)  TX bytes:7619 (7.4 KiB)

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:1511699 errors:0 dropped:0 overruns:0 frame:0
          TX packets:357092 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:203990694 (194.5 MiB)  TX bytes:52150776 (49.7 MiB)
          Interrupt:16 Memory:f4000000-f4011100

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:954 errors:0 dropped:0 overruns:0 frame:0
          TX packets:428106 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:51940 (50.7 KiB)  TX bytes:90445670 (86.2 MiB)

vif1.0    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:64258 errors:0 dropped:0 overruns:0 frame:0
          TX packets:562648 errors:0 dropped:115 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4142652 (3.9 MiB)  TX bytes:593022036 (565.5 MiB)

vif2.0    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:898 errors:0 dropped:0 overruns:0 frame:0
          TX packets:429185 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:108700 (106.1 KiB)  TX bytes:90550180 (86.3 MiB)

vif3.0    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:875 errors:0 dropped:0 overruns:0 frame:0
          TX packets:429167 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:107225 (104.7 KiB)  TX bytes:90548619 (86.3 MiB)

vif6.0    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:288128 errors:0 dropped:0 overruns:0 frame:0
          TX packets:724502 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:520109227 (496.0 MiB)  TX bytes:96161833 (91.7 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:424744 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:83800426 (79.9 MiB)  TX bytes:0 (0.0 b)




***** BRIDGE STATUS *****
bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no
              vif0.0
                                                        peth0
                                                        vif1.0
                                                        vif2.0
                                                        vif3.0
                                                        vif6.0



***** IP TABLES ON DOM0 *****
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     0    --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match
--physdev-in vif1.0
ACCEPT     0    --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match
--physdev-in vif2.0
ACCEPT     0    --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match
--physdev-in vif3.0
ACCEPT     0    --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match
--physdev-in vif6.0

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination



***** WORKING DOMU CONFIG *****

kernel  = '/boot/vmlinuz-2.6.18-4-xen-vserver-686'
ramdisk = '/boot/initrd.img-2.6.18-4-xen-vserver-686'
memory  = '256'
root    = '/dev/sda1 ro'
disk    = [ 'file:/xenservers/domains/xentest1/disk.img,sda1,w',
'file:/xenservers/domains/xentest1/swap.img,sda2,w' ]
name    = 'xentest1'
dhcp = 'dhcp'
vif  = [ 'mac=00:16:3E:44:43:99' ]
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'



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