Hello, i''ve set up a domU (called ''gwdomu'') for acting as a router (NAT + dhcp + firewall services) for a private LAN of machines. i''ve installed dnsmasq package on this domU 1) with as physical machine client in the LAN, it works : the PC gets an IP address from dnsmasq / gwdomu, and can go outside via ''gwdomu'' 2) with a Xen virtual machine client (i called it ''clientdomu''), it doesn''t work. ''gwdomu'' received several DHCPDiscover requests from ''clientdomu'' and send DHCPOFFER to the client mac address but never received DHCPREQUEST / DHCPACK from the client notes : 1) i''m using VLAN 2) i''m using Debian Lenny + Xen 3.2-1 for Dom0 and DomU 3) In the ''clientdomu'' /etc/network/interfaces i''ve added the option post-up ethtool -K eth0 tx off but with no effect... i also put tx off in dom0 ethX interface with no more effect. trace : domu''s config file # vlan115 vif = [ ''mac=00:16:3E:7F:BF:11,bridge=xenbr115'' ] dhcp = "on" clientdomu# cat /etc/net/interfaces auto eth0 iface eth0 inet dhcp post-up ethtool -K eth0 tx off clientdomu# ifconfig eth0 Link encap:Ethernet HWaddr 00:16:3e:7f:bf:11 clientdomu# dhclient eth0 Internet Systems Consortium DHCP Client V3.1.1 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ Listening on LPF/eth0/00:16:3e:7f:bf:11 Sending on LPF/eth0/00:16:3e:7f:bf:11 Sending on Socket/fallback DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18 5 bad udp checksums in 5 packets No DHCPOFFERS received. No working leases in persistent database - sleeping. ---- gwdomu with dnsmasq activated (tail syslog) with a DHCP domU: Jan 30 00:03:41 gwnat dnsmasq[27902]: DHCPOFFER(eth0) 192.168.115.107 00:16:3e:7f:bf:11 Jan 30 00:03:46 gwnat dnsmasq[27902]: DHCPDISCOVER(eth0) 00:16:3e:7f:bf:11 Jan 30 00:03:46 gwnat dnsmasq[27902]: DHCPOFFER(eth0) 192.168.115.107 00:16:3e:7f:bf:11 Jan 30 00:04:29 gwnat dnsmasq[27902]: DHCPDISCOVER(eth0) 00:16:3e:7f:bf:11 Jan 30 00:04:29 gwnat dnsmasq[27902]: DHCPOFFER(eth0) 192.168.115.107 00:16:3e:7f:bf:11 Jan 30 00:04:30 gwnat dnsmasq[27902]: DHCPDISCOVER(eth0) 00:16:3e:7f:bf:11 Jan 30 00:04:30 gwnat dnsmasq[27902]: DHCPOFFER(eth0) 192.168.115.107 00:16:3e:7f:bf:11 Jan 30 00:04:38 gwnat dnsmasq[27902]: DHCPDISCOVER(eth0) 00:16:3e:7f:bf:11 Jan 30 00:04:38 gwnat dnsmasq[27902]: DHCPOFFER(eth0) 192.168.115.107 00:16:3e:7f:bf:11 gwdomu with dnsmasq activated (tail syslog) with a DHCP physical PC: Jan 29 13:01:41 gwnat dnsmasq[16634]: DHCPDISCOVER(eth0) 00:04:75:d1:37:49 Jan 29 13:01:41 gwnat dnsmasq[16634]: DHCPOFFER(eth0) 192.168.115.104 00:04:75:d1:37:49 Jan 29 13:01:41 gwnat dnsmasq[16634]: DHCPREQUEST(eth0) 192.168.115.104 00:04:75:d1:37:49 Jan 29 13:01:41 gwnat dnsmasq[16634]: DHCPACK(eth0) 192.168.115.104 00:04:75:d1:37:49 kodos any idea ? thank you for your help Arnaud _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users