On 11/03/2009 05:45 PM, Harald Dunkel wrote:
Hi folks,I am trying to use a bonding network interface as a bridge for a virtual machine (kvm). Host and guest are both running 2.6.31.5. Problem: The guest does not receive the DHCPOFFER reply sent by my dhcp server. There is no such problem if the host uses just a single network interface instead of bond0. Looking at tcpdump on the Linux guest there are several dhcp discover packages like 15:17:44.005306 00:16:36:2f:f1:d2> ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68> 255.255.255.255.67: BOOTP/DHCP, Request from 00:16:36:2f:f1:d2, length 300, xid 0x4c31213d, secs 10, Flags [none] Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp] The dhcp server receives these packages, and sends out a reply 15:17:45.927589 00:16:36:2f:f1:d2> ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68> 255.255.255.255.67: BOOTP/DHCP, Request from 00:16:36:2f:f1:d2, length 300, xid 0x4c31213d, secs 10, Flags [none] Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp] 15:17:45.927658 00:15:17:94:16:65> 00:16:36:2f:f1:d2, ethertype IPv4 (0x0800), length 364: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 350) 172.19.96.123.67> 172.19.97.243.68: BOOTP/DHCP, Reply, length 322, xid 0x4c31213d, secs 10, Flags [none] Your-IP 172.19.97.243 Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp] This reply never shows up on the guest.
Can you tcpdump on bond0, br0, vnet0, and the guest's interface to see where the packet is lost?
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