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xen-users
Re: [Xen-users] Fully virtualized networking issues.
Hi
I did try again with another network bridge that throughout uses
standard MTU 1500. Also here I cannot get any packet in domU and vice
versa.
domU-hvm --b--- 74 0.0 1056640 12.6 1064960
12.7 1 2 0 0 2 0 0 0
2149620944
Net0 RX: 0bytes 0pkts 0err 458296drop
TX: 0bytes 0pkts 0err
0drop <-- bridge that
uses MTU 5000
Net1 RX: 0bytes 0pkts 0err 34121drop
TX: 0bytes 0pkts 0err
0drop <-- bridge that
uses MTU 1500
When I try to ping a host from domU these packets just get lost. No
errors or drops at domU network interface but also no appearance of
these packets in domU network.
It really seems that there is no connectivity at all between dom0
networking and the emulated domU device. What could cause this?
Kind regards
Reto Gantenbein
On May 2, 2008, at 12:14 PM, Reto Gantenbein wrote:
Hello everybody
I experience the same problem with a fully virtualized linux domU on
xen-3.2.0. The machine is a Sun X4200M2 with a "nVidia Corporation
CK804 Ethernet Controller" network device. It's a gigabit device
using the forcedeth driver. The tap device works fine but then the
vif drops all the packets! Why is this?
Here my output:
bridge name bridge id STP enabled interfaces
core 8000.00144f9ac773 no pcore
vif8.1
vif17.0
tap0
pcore Link encap:Ethernet HWaddr 00:14:4F:xx:xx:xx
UP BROADCAST RUNNING MULTICAST MTU:5000 Metric:1
RX packets:75480611 errors:4 dropped:0 overruns:0 frame:4
TX packets:71130077 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:139163029640 (132716.2 Mb) TX bytes:162640218550
(155105.7 Mb)
Interrupt:47 Base address:0x8000
vif8.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING MULTICAST MTU:5000 Metric:1
RX packets:59547485 errors:0 dropped:0 overruns:0 frame:0
TX packets:62527763 errors:0 dropped:915 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:131652168382 (125553.2 Mb) TX bytes:134094016346
(127882.0 Mb)
vif17.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:177716 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
tap0 Link encap:Ethernet HWaddr 00:FF:90:57:73:FD
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:173199 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 b) TX bytes:20296723 (19.3 Mb)
I can see the interface in my domU but it doesn't receive any
traffic at all. I already tried with model=ne2k_pci and
model=rtl8139 in the domU configuration. It didn't change anything.
I also have to mention that the bridged interface pcore is using MTU
5000 (that cannot be changed because the other domU relies on it).
When I would like to assign MTU 5000 to vif17.0 it fails with a
"SIOCSIFMTU: Invalid argument" errno.
Any hints about this?
Kind regards,
Reto Gantenbein
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