I have two hosts (identical hardware) running two different linux-distributions. Both are running kvm-qemu, and I have copied the same qcow-file for a linux clients to both hosts. My network is using the address-space 192.168.2.x I want the client to show in this space. So I configured the interface as shared device with virbr0 of type virtio on both servers in virt-manager. For one server (name = virthost) the behavior is as expected: The client is visible as 192.168.2.6 throughout the network. With the second server (name=labpc1) the client gets the address 192.168.122.225. I can ping the client under this address from the server labpc1, but not from other hosts in the network. So obviously the server-config is somehow different.
[root@virthost buesser]# /sbin/ifconfig enp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::2e4d:54ff:fe4e:cb79 prefixlen 64 scopeid 0x20<link> ether 2c:4d:54:4e:cb:79 txqueuelen 1000 (Ethernet) RX packets 251712 bytes 20440529 (19.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1133838 bytes 1612893332 (1.5 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 270 bytes 15166 (14.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 270 bytes 15166 (14.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.2.50 netmask 255.255.255.0 broadcast 192.168.2.255 inet6 fe80::2e4d:54ff:fe4e:cb79 prefixlen 64 scopeid 0x20<link> inet6 2003:c0:370e:3600:2e4d:54ff:fe4e:cb79 prefixlen 64 scopeid 0x0<global> ether 2c:4d:54:4e:cb:79 txqueuelen 1000 (Ethernet) RX packets 234255 bytes 13306620 (12.6 MiB) RX errors 0 dropped 717 overruns 0 frame 0 TX packets 230639 bytes 1504208543 (1.4 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::fc54:ff:fe54:d2af prefixlen 64 scopeid 0x20<link> ether fe:54:00:54:d2:af txqueuelen 1000 (Ethernet) RX packets 131040 bytes 113022492 (107.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 128330 bytes 149290254 (142.3 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::fc54:ff:fe90:c278 prefixlen 64 scopeid 0x20<link> ether fe:54:00:90:c2:78 txqueuelen 1000 (Ethernet) RX packets 110307 bytes 145357136 (138.6 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 80834 bytes 60947380 (58.1 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vnet2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::fc54:ff:fe9a:7cd prefixlen 64 scopeid 0x20<link> ether fe:54:00:9a:07:cd txqueuelen 1000 (Ethernet) RX packets 117 bytes 9210 (8.9 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1250 bytes 128326 (125.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@labpc1 ~]# /sbin/ifconfig enp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.2.8 netmask 255.255.255.0 broadcast 192.168.2.255 inet6 fe80::29e:8b0f:c0d4:ac95 prefixlen 64 scopeid 0x20<link> inet6 2003:c0:370e:3600:15ca:a8a2:5173:d03c prefixlen 64 scopeid 0x0<global> ether 34:97:f6:8e:c0:73 txqueuelen 1000 (Ethernet) RX packets 7807 bytes 830450 (810.9 KiB) RX errors 0 dropped 784 overruns 0 frame 0 TX packets 5529 bytes 2526116 (2.4 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 12376 bytes 2419241 (2.3 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 12376 bytes 2419241 (2.3 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:38:47:af txqueuelen 1000 (Ethernet) RX packets 46 bytes 3516 (3.4 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 34 bytes 3052 (2.9 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::fc54:ff:fe95:bcf3 prefixlen 64 scopeid 0x20<link> ether fe:54:00:95:bc:f3 txqueuelen 1000 (Ethernet) RX packets 46 bytes 4160 (4.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 279 bytes 25326 (24.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 So on labpc1 the physical interface gets the address of the host, and virbr0 gets 192.168.122.1 On virthost virbr0 has the (external) address of the physical host 192.168.2.50.
Can anybody shed some light?
Many thanks,
