![qemu network qemu network](https://forum.manjaro.org/uploads/default/original/3X/c/d/cdb55f59f5dc8174e62c6d8257db4ad8905a5aa8.png)
Observe the VM is sending out packets just fine, as seen via all the ARP activity. Listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
![qemu network qemu network](http://ctys.sourceforge.net/OpenSource/ctys-01.11.023/en/images/qemuLayeredInterfaces.png)
QEMU NETWORK FULL
Tcpdump: verbose output suppressed, use -v or -vv for full protocol decode The gateway and DHCP server is a Debian server (on which bridged guest VMs work fine, by the way).įirst tpcudmp as seen from the raspberry-pi during ping: $ sudo tcpdump -n -tttt -i eth0 ether host 52:54:00:60:ea:0e However, broadcast type packets do arrive and do get to the client VM. This question is already long enough without going into all the detail of variations tried here.ĭebug Details: No matter the configuration variant, the base issue is always the same, VM destined packets do not seem to arrive at the host, at least as seen by tcpdump. Note that some references mention special iptables rules and special attributes for the br_netfilter module, all of which have been tried. However the VMs do not have network access. The result: $ virsh net-list -allĪt this point, there are no iptables rules at all after re-boot. The default, NAT'd way was unlinked, from the autostart directory, so as not to. Once the bare file has been created with nano, these commands: virsh net-define br0.xml The Ubuntu Serverguide references this which says the name and bridge name have to be the same, but other references do not have them the same. xml files have been tried, including different names, and different references use differing techniques. The virtual stuff, /etc/libvirt/qemu/networks/br0.xml: The host bridge definition, /etc/netplan/01-netcfg.yaml, (this is one of many many attempts): # This file describes the network interfaces available on your system Ultimately the VMs will get their IP addresses from the main LAN, via DHCP, but for now and for better debugging information, they are using static IP addresses. The first 2 VMs are being converted from non-bridged, NAT'd, and the 3rd was created specifying bridged networking. Summary: In a bridged KVM/QEMU configuration, network packets destined to guest VM do not get there.Ĭonfiguration: The host is an up to date Ubuntu 20.04.2 LTS server The guest is any of 3 VMs, a very old 16.04 Ubuntu server, an old Ubuntu 20.04 desktop, and a brand new Ubuntu 21.04 desktop.