Hi all, We are experiencing a strange problem with DHCP+Xen running Debian Etch and xen-3.0.3-1. We have a setup where we use aliased (such as eth0:1) IP addresses to provide ''well-known'' IP''s on a network where the ''primary'' interface (eth0 in this case) is setup as DHCP. An example /etc/network/interfaces from our setup: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth0:1 inet static address x.x.x.y netmask 255.255.255.0 gateway x.x.x.y1 We ifup eth0:1 when we want the static IP address available, and ifdown when we don''t. In our case the DHCP server is running on the Image that is affected, all other images with this setup act ok. But in this case when eth0 tries to reacquire its IP address from DHCP (which is running locally on this image) it fails with the udp problem and the eth0:1 IP address goes away. Here is the output of ethtool -k eth0: Offload parameters for eth0: Cannot get device rx csum settings: Operation not supported Cannot get device udp large send offload settings: Operation not supported rx-checksumming: off tx-checksumming: off scatter-gather: off tcp segmentation offload: off udp fragmentation offload: off generic segmentation offload: off The workaround we have is to actually create a separate VIF for the static IP address and not have it aliased to eth0, and everything seems ok. I haven''t tried Xen 3.1 yet, so perhaps this issue is fixed there. But does anyone else have similar problems perhaps with heartbeat or other HA tools? TIA, Lin _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi all, We are experiencing a strange problem with DHCP+Xen running Debian Etch and xen-3.0.3-1. We have a setup where we use aliased (such as eth0:1) IP addresses to provide ''well-known'' IP''s on a network where the ''primary'' interface (eth0 in this case) is setup as DHCP. An example /etc/network/interfaces from our setup: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth0:1 inet static address x.x.x.y netmask 255.255.255.0 gateway x.x.x.y1 We ifup eth0:1 when we want the static IP address available, and ifdown when we don''t. In our case the DHCP server is running on the Image that is affected, all other images with this setup act ok. But in this case when eth0 tries to reacquire its IP address from DHCP (which is running locally on this image) it fails with the udp problem and the eth0:1 IP address goes away. Here is the output of ethtool -k eth0: Offload parameters for eth0: Cannot get device rx csum settings: Operation not supported Cannot get device udp large send offload settings: Operation not supported rx-checksumming: off tx-checksumming: off scatter-gather: off tcp segmentation offload: off udp fragmentation offload: off generic segmentation offload: off The workaround we have is to actually create a separate VIF for the static IP address and not have it aliased to eth0, and everything seems ok. I haven''t tried Xen 3.1 yet, so perhaps this issue is fixed there. But does anyone else have similar problems perhaps with heartbeat or other HA tools? TIA, Lin _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users