Hi all,
sorry for the previous partial e-mail, I hit the send button accidentally
;-).
I have a setup with a kvm-based virtual machine running a stock RedHat 6.1
(yes, that old) on a rather current debian host.
1. uname in host: 2.6.26-2-amd64 #1 SMP Wed May 12 18:03:14 UTC 2010
x86_64 GNU/Linux
2. uname in guest: 2.2.12-20 #1 Mon Sep 27 10:40:35 EDT 1999 i686 unknown
eth0 of the guest is connected via tap0 to a kernel bridge, that is in
turn connected via the host's eth1 to a Gigabit link. On the kvm
command-line I configure the guest-nic as "model=ne2k_pci".
The problem is, that I frequently loose network access from/to the guest.
I can see following diagnostics:
1. on the host:
ifconfig output:
brvm0 Link encap:Ethernet Hardware Adresse 00:24:81:f9:9c:ee
inet Adresse:10.0.2.11 Bcast:10.0.2.255 Maske:255.255.255.0
inet6-Adresse: fe80::224:81ff:fef9:9cee/64
Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:1120958 errors:0 dropped:0 overruns:0 frame:0
TX packets:373699 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:0
RX bytes:138554311 (132.1 MiB) TX bytes:32663228 (31.1 MiB)
eth0 ...
eth1 Link encap:Ethernet Hardware Adresse 00:24:81:f9:9c:ee
inet6-Adresse: fe80::224:81ff:fef9:9cee/64
Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:3563790 errors:0 dropped:0 overruns:0 frame:0
TX packets:2393282 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:1000
RX bytes:4059696847 (3.7 GiB) TX bytes:185671712 (177.0 MiB)
Interrupt:19 Speicher:fa000000-fa012100
lo ...
tap0 Link encap:Ethernet Hardware Adresse 00:ff:19:c8:e6:04
inet6-Adresse: fe80::2ff:19ff:fec8:e604/64
Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:3244437 errors:0 dropped:0 overruns:0 frame:0
TX packets:5080877 errors:0 dropped:96605 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:500
RX bytes:286049649 (272.7 MiB) TX bytes:4114169266 (3.8 GiB)
netstat -i looks similar:
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR
Flg
brvm0 1500 0 1121135 0 0 0 373788 0 0 0
BMRU
eth0 ...
eth1 1500 0 3563962 0 0 0 2393370 0 0 0
BMRU
lo ...
tap0 1500 0 3244471 0 0 0 5081115 0 96605 0
BMRU
I see a lot of dropped frames on tap0/TX.
2. In the guest:
eth0 Link encap:Ethernet HWaddr 02:11:BD:12:01:00
inet addr:10.0.2.12 Bcast:10.0.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3517949 errors:459 dropped:0 overruns:0 frame:6
TX packets:2439841 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:11 Base address:0xc100
lo ...
netstat -i:
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP
TX-OVR Flg
eth0 1500 0 3518044 459 0 0 2439871 0 0 0 BRU
lo ...
There is lost data on eth0/RX.
Also there are related messages from dmesg in the guest:
eth0: bogus packet size: 22597, status=0x16 nxpg=0xb3.
eth0: next frame inconsistency, 0xb3
eth0: bogus packet size: 64780, status=0xf3 nxpg=0x38.
eth0: bogus packet size: 60666, status=0xc5 nxpg=0x28.
eth0: bogus packet size: 40656, status=0x7f nxpg=0xfd.
eth0: next frame inconsistency, 0xfd
eth0: bogus packet size: 56339, status=0xc nxpg=0x27.
eth0: bogus packet size: 18323, status=0x4b nxpg=0xc4.
eth0: next frame inconsistency, 0xc4
Can someone please tell me, what might be the problem? Or point me to the
right direction, if this is OT here.
TIA,
aa
--
Please consider the environment before you print / Merci de penser à
l'environnement avant d'imprimer / Bitte denken Sie an die Umwelt bevor
Sie drucken
Bombardier Transportation GmbH
Vorsitzender des Aufsichtsrats / Chairman of Supervisory Board: Prof. Dr.
Wilhelm Bender
Geschäftsführung / Executive Board: Dr. Klaus Baur
(Vorsitzender/Chairman), Luc Charlemagne, Stefan Schönholz, Gregorius
Peters
Sitz der Gesellschaft / Principal Office: Berlin
Registergericht / Registration Court: Amtsgericht Charlottenburg, HRB
64838
_______________________________________________________________________________________________________________
This e-mail communication (and any attachment/s) may contain confidential
or privileged information and is intended only for the individual(s) or
entity named above and to others who have been specifically authorized to
receive it. If you are not the intended recipient, please do not read,
copy, use or disclose the contents of this communication to others. Please
notify the sender that you have received this e-mail in error by reply
e-mail, and delete the e-mail subsequently. Please note that in order to
protect the security of our information systems an AntiSPAM solution is in
use and will browse through incoming emails.
Thank you.
_________________________________________________________________________________________________________________
Ce message (ainsi que le(s) fichier(s)), transmis par courriel, peut
contenir des renseignements confidentiels ou protégés et est destiné à
l?usage exclusif du destinataire ci-dessus. Toute autre personne est, par
les présentes, avisée qu?il est strictement interdit de le diffuser, le
distribuer ou le reproduire. Si vous l?avez reçu par inadvertance,
veuillez nous en aviser et détruire ce message. Veuillez prendre note
qu'une solution antipollupostage (AntiSPAM) est utilisée afin d'assurer la
sécurité de nos systèmes d'information et qu'elle furètera les courriels
entrants.
Merci.
_________________________________________________________________________________________________________________
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
