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I tried to run a VM on QEMU, but the VM is up without an IP address associated with eth0. I configured the bridge and tap interface on the host, and I can see that:
brctl show bro
bridge name bridge id STP enabled interfaces
bro 8000.bedc8d16e7d8 no eno1
tap0
The interfaces look good:
ip addr show bro
3: bro: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether be:dc:8d:16:e7:d8 brd ff:ff:ff:ff:ff:ff
inet 192.168.100.112/24 brd 192.168.100.255 scope global dynamic bro
valid_lft 540129sec preferred_lft 540129sec
inet6 fe80::bcdc:8dff:fe16:e7d8/64 scope link
valid_lft forever preferred_lft forever
ip addr show eno1
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bro state UP group default qlen 1000
link/ether 98:90:96:9d:d9:83 brd ff:ff:ff:ff:ff:ff
ip addr show tap0
8: tap0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel master bro state DOWN group default qlen 1000
link/ether d2:74:5b:04:81:f8 brd ff:ff:ff:ff:ff:ff
inet 192.168.100.222/24 brd 192.168.100.255 scope global tap0
valid_lft forever preferred_lft forever
Here is the command I use to run the VM:
sudo qemu-system-aarch64 -m 1024 -cpu cortex-a57 -M virt -nographic -pflash flash0.img -pflash flash1.img -drive if=none,file=CentOS-7-aarch64-Minimal-1810.iso,id=hd0 -device virtio-blk-device,drive=hd0 -netdev type=tap,id=net0 -device virtio-net-device,netdev=net0,mac=bc:dc:8d:16:e7:d8, -hda centos7-arm.img
At the guest there is no IP, even though DHCP is no:
[root@localhost ~]# ip link show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether bc:dc:8d:16:e7:d8 brd ff:ff:ff:ff:ff:ff
after i tried to config from centos nmtui , service network restart failed. found in log:
localhost.localdomain network[4058]: Bringing up interface eth0: Error: Connection activation failed: IP configuration could not be reserved (no available address, timeout, etc.)
Do you have any idea what could be going wrong?
How do you configure the network interface? – Fanatique – 2019-03-25T08:47:32.647
Which interface? on host or guest? – RD7 – 2019-03-25T08:58:33.257