Re: macvtap with disconnected physical interface

Il 2022-05-03 10:31 Daniel P. Berrangé ha scritto: Here we go... <interface type='direct'> <mac address='xx:xx:xx:xx:xx:xx'/> <source dev='enp0s31f6' mode='bridge'/> <target dev='macvtap0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </interface> # ifconfig Both the physical and macvtap interfaces are disconnected (note how RUNNING is missing): enp0s31f6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether xx:xx:xx:xx:xx:xx txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 memory 0xf4300000-f4320000 macvtap0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether xx:xx:xx:xx:xx:xx txqueuelen 500 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 # ip link 2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff 6: macvtap0@enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN mode DEFAULT group default qlen 500 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff I can bring up the macvtap interface with the following command (notice the RUNNING/UP flag): # ip link set macvtap0 protodown off # ifconfig macvtap0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::redacted prefixlen 64 scopeid 0x20<link> ether xx:xx:xx:xx:xx:xx txqueuelen 500 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 42 bytes 6001 (6.0 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 # ip link 6: macvtap0@enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 500 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff However, at the next connection/disconnection of the physical link, the macvtap interface will go down again. Regards. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti(a)assyoma.it - info(a)assyoma.it GPG public key ID: FF5F32A8