Public bug reported: When STP is enabled on a bridge interface used on a libvirt network, DHCP requests fail 75% of the time during PXE boot. If I drop to the iPXE prompt, and send a few more dhcp requests, I'll often get a reply by the 3rd or 4th attempt. I've verified via dnsmasq logging + tcpdump that the requests are never actually making it to the server. Disabling STP on the corresponding bridge fixes.
Serge Hallyn seems to think its due to upstream commit @ https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=605953 libvirt-bin 0.9.8-2ubuntu7 qemu-kvm 1.0+noroms-0ubuntu4 kvm-pxe 5.4.5 <network> <name>cobbler-devnet</name> <uuid>7976ddf2-4e92-e15a-7b4d-2948542a3349</uuid> <forward mode='nat'/> <bridge name='virbr1' stp='on' delay='0' /> <mac address='52:54:00:C2:5D:94'/> <ip address='192.168.123.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.123.2' end='192.168.123.254' /> <host mac='00:16:3e:3e:aa:02' name='node02' ip='192.168.123.102' /> <host mac='00:16:3e:3e:aa:03' name='node03' ip='192.168.123.103' /> <host mac='00:16:3e:3e:aa:01' name='node01' ip='192.168.123.101' /> <host mac='00:16:3e:3e:a9:1a' name='cobbler' ip='192.168.123.2' /> <bootp file='pxelinux.0' server='192.168.123.2' /> </dhcp> </ip> </network> ** Affects: libvirt (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/924446 Title: STP enabled on bridge results in unreliable PXE boot of guests To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/924446/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
