[Xen-users] Strange TCP-Problem with GPL PV 0.8.8

[Stephan Schnitzer <hakker@xxxxxxx>]

Hi all,

I have a strange problem with GPL PV 0.8.8 (0.6.4 did work).

On my 2nd vif I cannot establish TCP connections. The 3rd IP packet (ACK 
from XEN-Image) is not forwarded by XEN/DOM0-Bridge.
If I boot Windows without /GPLPV option, everything works fine.

I did some investigation and found out that the packages arrive 
differently if GPLPV is enabled.
"br_inet" is a bridge connected to the DSL router via peth1.

With /GPLPV:
iptables log: IN=br_inet OUT=br_inet PHYSIN=tap3 PHYSOUT=peth1 
SRC=10.10.11.250 DST=209.85.129.99 LEN=40 TOS=0x00 PREC=0x00 TTL=128 
ID=465 DF PROTO=TCP SPT=1050 DPT=80 WINDOW=65535 RES=0x00 ACK URGP=0
=> Those packets are never forwarded to peth1. To be sure I verified 
this by using port mirroring on the switch that connects peth1 with the 
DSL router.
Without /GPLPV:
iptables log: IN=br_inet OUT=br_inet PHYSIN=vif44.1 PHYSOUT=peth1 
SRC=10.10.11.250 DST=209.85.135.103 LEN=40 TOS=0x00 PREC=0x00 TTL=128 
ID=22627 DF PROTO=TCP SPT=1137 DPT=80 WINDOW=65535 RES=0x00 ACK URGP=0
=> Those packets are forwarded to peth1

The only relevant difference seems to be the PHYSIN interface.

I have to mention that the communication between Dom0 and DomU works 
perfectly with GPLPV (first vif, more than 10 times faster than without 
GPLPV). The only problem are TCP connections to the internet (second vif).
My System:
Ubuntu 7.10 64bit with XEN 3.1 on Intel Xeon 5130
Windows XP x64 SP2 (english with German MUI)

Any suggestions?

Thanks, Stephan

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users