In version 3.x it was possible to change the mac address on the vif interface in dom0. In xen 4.0.1 (SLES distribution) an attempt to change mac address has no success. ip link set vifX.X address XX:XX:XX:XX:XX:XX RTNETLINK answers: Operation not supported Is it bug or feature of xen 4? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Ian Campbell
2011-Jan-21 14:46 UTC
Re: [Xen-devel] unable to change mac address on vif interface
On Fri, 2011-01-21 at 14:26 +0000, Nikita wrote:> In version 3.x it was possible to change the mac address on the vif > interface in dom0. > In xen 4.0.1 (SLES distribution) an attempt to change mac address has > no success. > ip link set vifX.X address XX:XX:XX:XX:XX:XX > RTNETLINK answers: Operation not supported > > > Is it bug or feature of xen 4?Neither, it is a bug/feature of the kernel you are using. Looking at both the historical Xen kernels and the newer pvops kernels it appears that netfront has always correctly implemented the necessary driver hook (->set_mac_address in older kernels and ->ndo_set_mac_address in newer) while netback has never done so. What domain 0 kernel version are you running? Which version worked? I suspect using the generic eth_validate_addr and eth_mac_addr implementations for the ndo_set_mac_address and ndo_validate_addr hooks respectively in netback too will be sufficient. Can you cook up a patch? Ian. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel