This is something I raised on the upstream xen-devel mailing list. I have not yet received any response, so I though I'd try to ask here: I am using Xen with the included network-route and vif-route scripts. My system runs Fedora 14 with Michael Young's Dom0 kernel. When xend starts and network-route executes, I see the following error: /etc/xen/scripts/network-route: line 28: /proc/sys/net/ipv4/conf/eth/proxy_arp: No such file or directory It seems that the problem is that the vifnum shell variable is not set. Later, when I start an unprivileged domain, I see: physdev match: using --physdev-out in the OUTPUT, FORWARD and POSTROUTING chains for non-bridged traffic is not supported anymore. Are these messages expected? I have submitted a report to the Red Hat Bugzilla system: https://bugzilla.redhat.com/show_bug.cgi?id=669747 The report includes two patches that fix this issue for me. -- Mike :wq -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen