Connecting a VM to second NIC in KVM (Virtual Machine Manager)

[rkorson]

So this is a somewhat newbie question. I have Ubuntu 19.10 running as a HTPC but it's got power to spare. I have a second NIC it and would like to connect a guest VM (Ubuntu or CentOS) directly to this card so it's seem on my LAN; meaning it gets a DHCP address and local DNS name from my rougher while my host OS does the same from the onboard NIC. I plan to use this for light back-up services.

I was planning on using KVM with Virtual Machine Manager to accomplish this. My reading has got me confused. It seem like I need to set up a bridge but might be able to do some sort of hardware direct addressing. What would be best way to do this. I feel like this is simple but some discussions and tutorials have me going in circles.

Thanks in advance for your help!

[QIII]

When you set up the VM, you can choose its NIC directly. Just make sure you don't use the one dedicated to your host.

I have 13 VMs on this machine with 1 spare NIC on the mobo and 3 4-port NIC cards. One of the NICs on the mobo is dedicated to the host.

No bridge needed.

[rkorson]

Thanks, I hoped it was that easy but I am having problems:

My ifconfig looks like this:

eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

inet 192.168.0.234 netmask 255.255.255.0 broadcast 192.168.0.255

inet6 fe80::8a17:6c08:6733:8d3c prefixlen 64 scopeid 0x20<link>

ether 98:90:96:9f:89:dd txqueuelen 1000 (Ethernet)

RX packets 1030474 bytes 365795691 (365.7 MB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 1609289 bytes 1031614589 (1.0 GB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

device interrupt 20 memory 0xf7f00000-f7f20000

enp4s2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

ether 00:0a:5e:19:c2:cc txqueuelen 1000 (Ethernet)

RX packets 380732 bytes 369544437 (369.5 MB)

RX errors 0 dropped 6123 overruns 0 frame 0

TX packets 96312 bytes 7663699 (7.6 MB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

device interrupt 19

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 39721 bytes 5167336 (5.1 MB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 39721 bytes 5167336 (5.1 MB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500

inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255

ether 52:54:00:68:45:9c txqueuelen 1000 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 20 bytes 6090 (6.0 KB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

I am tying to use enp4s2. When I start of new VM and the wizard ask me select s Network I can pick "Host device enp4s2: maxtap. Then ask for as source what should I select, nothing seems to work. Thanks!