Hi folks, I would like to run a bridge for kvm on a bonding interface (4 * 1Gbit, Intel e1000e). Problem: The DHCPDISCOVER packets sent by the guest show up on my dhcp server as expected, but the DHCPOFFER sent as a reply doesn't reach the guest behind the bridge. Using tcpdump on host and guest I can see the DHCPOFFER on the bond0 and br0 interface, but it never shows up on vnet0 or on the guest's eth0. If I drop the bonding interface and use the host's eth2 for the bridge instead, then there is no such problem. Kernel on host and guest is 2.6.31.5. Below you can find more information about my setup. I had sent this information to the linux kvm mailing list before, but consensus was that this is a bridging problem. See http://www.spinics.net/lists/kvm/msg25153.html Would it be possible to track this problem down? Any helpful comment would be highly appreciated. Many thanx Harri ==================================================================== # brctl show bridge name bridge id STP enabled interfaces br0 8000.001517ab0a59 no bond0 vnet0 # ip addr list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth2: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000 link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000 link/ether 00:30:48:c6:e0:98 brd ff:ff:ff:ff:ff:ff 4: eth3: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000 link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff 5: _rename: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000 link/ether 00:30:48:c6:e0:99 brd ff:ff:ff:ff:ff:ff 6: eth4: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000 link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff 7: eth5: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000 link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff 8: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff inet6 fe80::215:17ff:feab:a59/64 scope link valid_lft forever preferred_lft forever 51: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether 00:15:17:ab:0a:59 brd ff:ff:ff:ff:ff:ff inet 172.19.96.25/23 brd 172.19.97.255 scope global br0 inet6 fe80::215:17ff:feab:a59/64 scope link valid_lft forever preferred_lft forever 52: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 link/ether c6:d7:7b:fb:02:35 brd ff:ff:ff:ff:ff:ff inet6 fe80::c4d7:7bff:fefb:235/64 scope link valid_lft forever preferred_lft forever # cat /proc/net/bonding/bond* Ethernet Channel Bonding Driver: v3.5.0 (November 4, 2008) Bonding Mode: load balancing (round-robin) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth2 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:15:17:ab:0a:59 Slave Interface: eth3 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:15:17:ab:0a:58 Slave Interface: eth4 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:15:17:ab:0a:5b Slave Interface: eth5 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:15:17:ab:0a:5a _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
