apport information ** Attachment added: "Lsusb-t.txt" https://bugs.launchpad.net/bugs/1946028/+attachment/5530568/+files/Lsusb-t.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1946028 Title: DHCP Offer not traversing linux bridge Status in linux package in Ubuntu: New Bug description: I'm facing a problem in a customer where a VM plugged to a bridge will not get DHCP responses from dhcp server running on the host or externally (the bridge has level 2 external uplink). Relevant information: - focal with latest GA kernel (5.4.0-88) - tested with HWE (5.11) and same results - bridge is configured using netplan, with bond as uplink, ip on the bridge - removed bond from the equation (bridge --> eno1), same result - host can access external network with no problems using the uplink plugged in the bridge - dhcp server (ISC-DHCP) configured on the host - stp on the bridge is disabled Create VM, attach it to the bridge, power it on, boots. Requests IP via DHCP. The discover can be seen on tcpdump inside the vm, and also on the tcpdump on the host bridge. DHCP server answers with Offer, that packet can be seen in the bridge but do not enter the VM. If I manually put an IP on the VM, it pings the host and the external world. Mac/ARP resolution seems to be working both ways (arping tested). Now, if I UNPLUG the uplink from the bridge (leaving only the host itself with IP on the bridge and one VM plugged on it) then the VM can get IP via DHCP, the Offer comes in. I'm not sure why it matters having the uplink when dhcp requests are being answered locally. After being able to ping externally, if I remove the IP and try DHCP again, it fails again. The hardware is a IBM HS23 blade with Emulex 10Gbit cards: ubuntu@app2maas001p:~$ lspci -v | grep -i net 16:00.0 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 03) Kernel driver in use: be2net Kernel modules: be2net 16:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 03) Kernel driver in use: be2net Kernel modules: be2net I'm verifying if there is firmware updates available but I doubt it. No extra features (like FCoE, partitioning, etc.) are enabled on the card. It's a single dual-port mezanine card. --- ProblemType: Bug AlsaDevices: total 0 crw-rw----+ 1 root audio 116, 1 Oct 1 18:37 seq crw-rw----+ 1 root audio 116, 33 Oct 1 18:37 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.11-0ubuntu27.20 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: pass DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2021-09-21 (13 days ago) InstallationMedia: Ubuntu-Server 20.04.3 LTS "Focal Fossa" - Release amd64 (20210824) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: IBM BladeCenter HS23 -[7875AC1]- NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair Package: linux (not installed) PciMultimedia: ProcFB: 0 mgag200drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-88-generic root=UUID=37c86220-68e3-45c6-b333-614ece4d7e57 ro ProcVersionSignature: User Name 5.4.0-88.99-generic 5.4.140 RelatedPackageVersions: linux-restricted-modules-5.4.0-88-generic N/A linux-backports-modules-5.4.0-88-generic N/A linux-firmware 1.187.17 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' Tags: focal uec-images Uname: Linux 5.4.0-88-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirt lxd plugdev sudo _MarkForUpload: True dmi.bios.date: 05/14/2014 dmi.bios.vendor: IBM dmi.bios.version: -[TKE140YUS-1.60]- dmi.board.name: 00AE761 dmi.board.vendor: IBM dmi.chassis.asset.tag: none dmi.chassis.type: 28 dmi.chassis.vendor: IBM dmi.chassis.version: none dmi.modalias: dmi:bvnIBM:bvr-[TKE140YUS-1.60]-:bd05/14/2014:svnIBM:pnBladeCenterHS23-[7875AC1]-:pvr07:rvnIBM:rn00AE761:rvr:cvnIBM:ct28:cvrnone: dmi.product.family: System X dmi.product.name: BladeCenter HS23 -[7875AC1]- dmi.product.version: 07 dmi.sys.vendor: IBM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1946028/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
