Xen users - Aug 2005 - network traffic can''t be seen by iptables when no bridge presents

In my project, I tried to use iptables, instead of bridge, to direct
networking traffics from one VM to another in one host. What I am doing is
I delete xen-br0, and I have two VMs that have IP addresses of 10.8.0.51
and 10.8.0.52. I use

iptables -t mangle -A FORWARD -d 10.8.0.51 -j ROUTE --oif vif1.0
iptables -t mangle -A FORWARD -d 10.8.0.52 -j ROUTE --oif vif2.0

vif1.0 and vif2.0 are the virtual network interfaces of two VMs. In order
to debug the above rules, I log all the traffics:

iptables -t mangle -A PREROUTING -j LOG --log-level debug --log-prefix
"log-everything"

I ping 10.8.0.52 from 10.8.0.51 and I expect to see the traffics would be
logged. However, I can''t see any corresponding traffics are logging.
Only
traffics looks like :

IN=lo OUT= ip-source=127.0.0.1 ip-destination=127.0.0.1........

I use tcpdump to listen on vif1.0 and I can see the icmp requsts from
10.8.0.51 to 10.8.0.52.

I am using the kernel linux-2.6.11-xen0. Does anybody have ideas about it?
Is it because there is no bridge presenting?


thanks
liang


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