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RE: [Xen-devel] Networking problems at xend start

To: "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Networking problems at xend start
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Tue, 30 Aug 2005 03:20:16 +0100
Cc: "Magolan, John F" <John.Magolan@xxxxxxxxxx>, "Davis, Jason" <jason.davis@xxxxxxxxxx>, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>, "Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>
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Thread-index: AcWqg/3LR8HdTMgaR6WyGZxFgRAn2gChSBkQ
Thread-topic: [Xen-devel] Networking problems at xend start
> I am noticing that when I bring up xend on a machine with 2 
> ethernet cards, Dom 0 loses networking. I can still see the 
> machine from within the subnet it belongs to, but it has no 
> visibility outside.

How do you normally get the default gateway in your setup? Is it
specified in one of the ifcfg-eth[01] files, or in
/etc/sysconfig/network ?

Without starting xend, what happens if you do "ifdown eth0; ifup eth0".
My guess is you'll loose the default route.

Ian

> The machine has a Dell 82545M Gigabit Ethernet controller set 
> up as eth0 and an intel Etherexpress pro 100 server adapter 
> set up as eth1.
> 
> I have included the ifconfig output before and after xend start.
> I have also included netstat-rn output with and without the 
> intel eepro100 
> 
> I don't see any messages on the serial output.
> 
> Is any one else seeing similar problems?
> 
> Raj
> 
> ---------------ifconfig before xend start
> 
> eth0      Link encap:Ethernet  HWaddr 00:0F:1F:8D:00:72  
>           inet addr:192.63.245.69  Bcast:192.63.245.255 
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500 
>  Metric:1
>           RX packets:9160 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:14957 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:603281 (589.1 Kb)  TX bytes:20736627 (19.7 Mb)
>           Base address:0xdcc0 Memory:dfee0000-dff00000 
> 
> eth1      Link encap:Ethernet  HWaddr 00:90:27:B6:9D:02  
>           inet addr:192.63.245.56  Bcast:192.63.245.255 
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500 
>  Metric:1
>           RX packets:397 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:36956 (36.0 Kb)  TX bytes:692 (692.0 b)
> 
> 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:15195 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:15195 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:8895385 (8.4 Mb)  TX bytes:8895385 (8.4 Mb)
> 
> ----------------ifconfig after xend start
> eth0      Link encap:Ethernet  HWaddr 00:0F:1F:8D:00:72  
>           inet addr:192.63.245.69  Bcast:192.63.245.255 
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500 
>  Metric:1
>           RX packets:78 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:6102 (5.9 Kb)  TX bytes:1240 (1.2 Kb)
> 
> eth1      Link encap:Ethernet  HWaddr 00:90:27:B6:9D:02  
>           inet addr:192.63.245.56  Bcast:192.63.245.255 
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500 
>  Metric:1
>           RX packets:1423 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1368 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:101651 (99.2 Kb)  TX bytes:1677335 (1.5 Mb)
> 
> 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:20951 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:20951 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:10742785 (10.2 Mb)  TX bytes:10742785 (10.2 Mb)
> 
> peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
>           RX packets:9855 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:15814 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:651133 (635.8 Kb)  TX bytes:21623556 (20.6 Mb)
>           Base address:0xdcc0 Memory:dfee0000-dff00000 
> 
> vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:3 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:78 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:1240 (1.2 Kb)  TX bytes:6102 (5.9 Kb)
> 
> xen-br0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:77 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:5712 (5.5 Kb)  TX bytes:0 (0.0 b)
> 
> 
> ----------ifconfig after xend start with only 1 nic
> 
> eth0      Link encap:Ethernet  HWaddr 00:0F:1F:8D:00:72  
>           inet addr:192.63.245.69  Bcast:192.63.245.255 
> Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500 
>  Metric:1
>           RX packets:297 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:297 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:20561 (20.0 Kb)  TX bytes:171020 (167.0 Kb)
> 
> 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:14715 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:14715 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:8830936 (8.4 Mb)  TX bytes:8830936 (8.4 Mb)
> 
> peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
>           RX packets:9883 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:17040 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:709060 (692.4 Kb)  TX bytes:24438245 (23.3 Mb)
>           Base address:0xdcc0 Memory:dfee0000-dff00000 
> 
> vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:297 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:297 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:171020 (167.0 Kb)  TX bytes:20561 (20.0 Kb)
> 
> xen-br0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:66 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:6148 (6.0 Kb)  TX bytes:0 (0.0 b)
> 
> 
> ---------------Netstat with 2 ethernet cards before xend starts
> 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS 
> Window  irtt
> Iface
> 192.63.245.0    0.0.0.0         255.255.255.0   U         0 0 
>          0
> eth0
> 192.63.245.0    0.0.0.0         255.255.255.0   U         0 0 
>          0
> eth1
> 169.254.0.0     0.0.0.0         255.255.0.0     U         0 0 
>          0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U         0 0 
>          0
> lo
> 0.0.0.0         192.63.245.250  0.0.0.0         UG        0 0 
>          0
> eth0
> 
> --------------Netstat with 2 ethernet cards after xend starts 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS 
> Window  irtt
> Iface
> 192.63.245.0    0.0.0.0         255.255.255.0   U         0 0 
>          0
> eth1
> 192.63.245.0    0.0.0.0         255.255.255.0   U         0 0 
>          0
> eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U         0 0 
>          0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U         0 0 
>          0
> lo
> 
> -------------Netstat with 1 ethernet card after xend starts
> 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS 
> Window  irtt
> Iface
> 192.63.245.0    0.0.0.0         255.255.255.0   U         0 0 
>          0
> eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U         0 0 
>          0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U         0 0 
>          0
> lo
> 0.0.0.0         192.63.245.250  0.0.0.0         UG        0 0 
>          0
> eth0
> 
> 
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