For the background I am trying to make networking work on Octeon Linux guest(run on QEMU) and using e1000 ethernet iface for this purpose. At the moment if I ping bridge iface (running command on guest), bridge iface receives ICMP echo request message but does not reply(I have observed using tcpdump)... But, when I ping bridge iface through x86 guest( using same IP for eth0 as in case of octeon linux), bridge replies to ICMP echo requests. This suggests that there is not any problem with host or bridge networking system. Does anyone have any idea which subsystems should I try to look, to locate this problem ??