There is a online.net service machine, Centos 7 on it, you need to pick up two virtual machines, picked up one Centos 6.6 and encountered an interface (bridge) problem.

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 195.154.200.167 netmask 255.255.255.0 broadcast 195.154.200.255 inet6 fe80::d6ae:52ff:fecf:3344 prefixlen 64 scopeid 0x20<link> ether d4:ae:52:cf:33:44 txqueuelen 1000 (Ethernet) RX packets 9607 bytes 1594014 (1.5 MiB) RX errors 0 dropped 24 overruns 0 frame 0 TX packets 4938 bytes 2677884 (2.5 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

It also comes two more ip

 eth0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 195.154.36.34 netmask 255.255.255.255 broadcast 195.154.36.34 ether d4:ae:52:cf:33:44 txqueuelen 1000 (Ethernet)

The virtual MAC address is not activated in this interface. Setting up a second interface with an activated MAC address.

 DEVICE="eth0:1" HWADDR=52:54:00:00:40:85 # виртуальный мак ONBOOT=yes BRIDGE=br0 NM_CONTROLLED=no

And the bridge over it

 DEVICE=br0 TYPE=Bridge BOOTPROTO=static IPADDR="195.154.36.32" NETMASK="255.255.255.255" ONBOOT=yes DELAY=0 NM_CONTROLLED=no

In all his research he came to disable firewalld, installing iptables b other shamanism on the links

And others, by the way, the command given here leads to an error

 [root@wtcard ~]# virsh iface-bridge eth0:1 br0 error: failed to get interface 'eth0:1' error: internal error: couldn't find interface named 'eth0:1': unspecified error - errors in loading some config files

Tell me which direction I'm going wrong?

  • The first two wrong directions are related to network aliases and ifconfig . aliases for five or ten years simply does not exist, and ifconfig has been working incorrectly for fifteen years now: you should use the ip program. the third wrong (as I understand it) direction is some kind of “virtual poppies”. - aleksandr barakin
  • unfortunately, I didn’t find an intelligent short guide, so I’ll just give you a search line: kvm bridge multiple ip - aleksandr barakin

1 answer 1

Here's a link for you and go there in the second paragraph, how to make a bridge for KVM. And generally cool site for centos