What is the VMM Network selection for a LAN and WAN NIC

eiger3970 0

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eiger3970 0

@viragomann I've realised the bridges I create NIC0-br0 and NIC1-br1, disappear after rebooting the machine?
However virbr0 appears (probably from KVM) and stays after a reboot.

The main issue now seems to be the Ubuntu 22.04 machine can't ping the vm router on 192.168.1.1.
I can't quite figure out the host machine's static ip, even though I thought I set it in /etc/netplan/01-network-manager-all.yaml.

eiger3970 0

@eiger3970-0
After a few Ubuntu 22.04 reboots, the br0 and br1 appear permanent.
However, whilst br0 connectes to enp3s0, br1 won't stay connected to enp2s0?
br0 automatically connects to vnet1, after I start up the vm.
Confusing?

ubuntu@ubuntu:/etc/netplan$ ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 1c:61:b4:6d:38:4f brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global noprefixroute enp2s0
       valid_lft forever preferred_lft forever
    inet6 fe80::31ca:9227:dcb3:d09e/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:88:b4:b4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether d2:da:46:a2:b2:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global noprefixroute br1
       valid_lft forever preferred_lft forever
    inet6 fe80::d0da:46ff:fea2:b23e/64 scope link 
       valid_lft forever preferred_lft forever
6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0a:d4:78:1f:cd:41 brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 brd 100.127.255.255 scope global dynamic noprefixroute br0
       valid_lft 267sec preferred_lft 267sec
    inet6 2406:2d40:4100:8fb2:20eb:c8df:ba1e:9e3e/64 scope global temporary dynamic 
       valid_lft 202sec preferred_lft 52sec
    inet6 2406:2d40:4100:8fb2:8d4:78ff:fe1f:cd41/64 scope global dynamic mngtmpaddr 
       valid_lft 202sec preferred_lft 52sec
    inet6 fe80::8d4:78ff:fe1f:cd41/64 scope link 
       valid_lft forever preferred_lft forever
7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:33:3c:4b brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe33:3c4b/64 scope link 
       valid_lft forever preferred_lft forever
8: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:50:81:3f brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe50:813f/64 scope link 
       valid_lft forever preferred_lft forever
ubuntu@ubuntu:/etc/netplan$ bridge link
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 
7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 
8: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 100 
ubuntu@ubuntu:/etc/netplan$ ubuntu@ubuntu:/etc/netplan$ cat 01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp2s0:
      dhcp4: true 
    enp3s0:
      dhcp4: true
  bridges:
    br0:
      dhcp4: true
      interfaces:
        - enp3s0
    br1:
      dhcp4: false
      addresses: [192.168.1.120/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8,8.8.8.4]
      interfaces:
        - enp2s0

viragomann

@eiger3970-0
I'd kick the Network Manager away and do it with ifup / ifdown scripts.
This is a server, the settings need to be done only once.

I only use NM on the desktop and notebook, because you can easily make a VPN connection with it.

eiger3970 0

@viragomann Yes, I've updated the bridge connection via ip link commands and have the NIC0-br0 and NIC1-br1.
However, this Ubuntu 22.04 machine 192.168.1.120 and the guest vm pfSense 192.168.1.1 won't ping each other?

ubuntu@ubuntu:/etc/netplan$ ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br1 state UP group default qlen 1000
    link/ether 1c:61:b4:6d:38:4f brd ff:ff:ff:ff:ff:ff
    inet6 fe80::31ca:9227:dcb3:d09e/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:88:b4:b4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fe:54:00:33:3c:4b brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe33:3c4b/64 scope link 
       valid_lft forever preferred_lft forever
8: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fe:54:00:50:81:3f brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe50:813f/64 scope link 
       valid_lft forever preferred_lft forever
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0a:d4:78:1f:cd:41 brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 brd 100.127.255.255 scope global dynamic noprefixroute br0
       valid_lft 294sec preferred_lft 294sec
    inet6 2406:2d40:4100:8fb2:19c5:376e:1317:8ae1/64 scope global temporary dynamic 
       valid_lft 197sec preferred_lft 47sec
    inet6 2406:2d40:4100:8fb2:8d4:78ff:fe1f:cd41/64 scope global dynamic mngtmpaddr 
       valid_lft 197sec preferred_lft 47sec
    inet6 fe80::8d4:78ff:fe1f:cd41/64 scope link 
       valid_lft forever preferred_lft forever
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether d2:da:46:a2:b2:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global noprefixroute br1
       valid_lft forever preferred_lft forever
    inet6 fe80::d0da:46ff:fea2:b23e/64 scope link 
       valid_lft forever preferred_lft forever
ubuntu@ubuntu:/etc/netplan$ bridge link
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 4 
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 
ubuntu@ubuntu:/etc/netplan$ cat 01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp2s0:
      dhcp4: true 
    enp3s0:
      dhcp4: true
  bridges:
    br0:
      dhcp4: true
      interfaces:
        - enp3s0
    br1:
      dhcp4: false
      addresses: [192.168.1.120/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8,8.8.8.4]
      interfaces:
        - enp2s0
ubuntu@ubuntu:/etc/netplan$ ip r
default via 100.64.0.1 dev br0 proto dhcp metric 425 
default via 192.168.1.1 dev br1 proto static metric 20426 
34.120.255.244 dev br0 proto dhcp scope link metric 425 
100.64.0.0/10 dev br0 proto kernel scope link src 100.76.25.213 metric 425 
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown 
192.168.1.0/24 dev br1 proto kernel scope link src 192.168.1.120 metric 426 
192.168.100.1 dev br0 proto dhcp scope link metric 425 
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

viragomann

@eiger3970-0
The "ip a" output doesn't look plausible to me. If a single NIC is slave in a bridge, I'd expect that the bridge takes over the MAC from the NIC.

Also there should not be any IP settings on the NIC port. However, your enp2s0 shows IPv6 settings.

Also I cannot see that any of your virtual interfaces is connected to one of the bridges. So it's expected that pinging doesn't work.
Did you set the bridge name in VMM?

eiger3970 0

@viragomann Maybe I'm missing the connection, but not sure what to do? I connect NIC0-br0 and NIC1-br1. Maybe I need something like NIC0-br0-vtnet0 and NIC1-br1-vtnet1?

I create bridges for the VMM, in this order.
1: Ubuntu 22.04 Host machine:
sudo ip link set dev enp3s0 master br0
sudo ip link set dev enp2s0 master br1

2: Ubuntu 22.04 Host machine:
/etc/netplan/01-network-manager-all.yaml

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp2s0:
      dhcp4: true 
    enp3s0:
      dhcp4: true
  bridges:
    br0:
      dhcp4: true
      interfaces:
        - enp3s0
    br1:
      dhcp4: false
      addresses: [192.168.1.120/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8,8.8.8.4]
      interfaces:
        - enp2s0

3: Virtual Machine Manager 4.0.0:
Virtual Network Interface > Network Source: Bridge device... > Device name: br0.
Add Hardware > Virtual Network Interface > Network Source: Bridge device... > Device name: br1.

viragomann

@eiger3970-0 said in What is the VMM Network selection for a LAN and WAN NIC:

3: Virtual Machine Manager 4.0.0:
Virtual Network Interface > Network Source: Bridge device... > Device name: br0.
Add Hardware > Virtual Network Interface > Network Source: Bridge device... > Device name: br1.

That's how I did it as well. But running "ip a", my virtual NICs show the bridges they're connected to:

However, as already mentioned, I don't use the Network Manager.

Do you use the host also for other purposes? If it's only for virtualization I'd consider to install Proxmox or alike on it.

eiger3970 0

@viragomann I just use the host machine as a personal desktop.
I previously ran Proxmox which ran nicely, however had to run Ubuntu as a vm.
My hope is to run Ubuntu with better performance not being a vm any longer.

eiger3970 0

@eiger3970-0 I've reinstalled the Ubuntu 22.04, VMM 4.0.0 and VM pfSense.
Ubuntu 192.168.1.120 pings the Internet (very slow connection though), vm router and LAN devices.
VM router 192.168.1.1 pings Ubuntu and LAN devices, however not the Internet.
This tells me Internet is running via the Ubuntu 22.04 iptables, rather than via the vm router.
Somehow I think I'm missing bridging the WAN interface NIC0-br0-vm router?
Here's my latest configuration:

root@ubuntu:/etc/netplan# cat 50-cloud-init.yaml
network:
  version: 2
  renderer: networkd

  ethernets:
    enp2s0:
      dhcp4: false
      dhcp6: false
    enp3s0:
      dhcp4: false
      dhcp6: false

  bridges:
    br0:
      interfaces: [enp3s0]
      dhcp4: true
      dhcp6: true
    br1:
      interfaces: [enp2s0]
      addresses: [192.168.1.120/24]
      # gateway4 is deprecated, use routes instead.
      routes:
      - to: default
        via: 192.168.1.1
        metric: 100
        on-link: true
      mtu: 1500
      nameservers:
        addresses: [8.8.8.8]
      parameters:
        stp: true
        forward-delay: 4
      dhcp4: no
      dhcp6: no

root@ubuntu:/etc/netplan# ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br1 state UP group default qlen 1000
    link/ether 1c:61:b4:6d:38:4f brd ff:ff:ff:ff:ff:ff
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:a9:81:30 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
8: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:d4:d4:20 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fed4:d420/64 scope link 
       valid_lft forever preferred_lft forever
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether e2:73:dd:ac:ba:e0 brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 metric 100 brd 100.127.255.255 scope global dynamic br0
       valid_lft 187sec preferred_lft 187sec
    inet6 2406:2d40:4100:8fb2:e073:ddff:feac:bae0/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 233sec preferred_lft 83sec
    inet6 fe80::e073:ddff:feac:bae0/64 scope link 
       valid_lft forever preferred_lft forever
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ce:08:2f:30:4a:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global br1
       valid_lft forever preferred_lft forever
    inet6 fe80::cc08:2fff:fe30:4a71/64 scope link 
       valid_lft forever preferred_lft forever
11: vnet4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:95:1e:e5 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe95:1ee5/64 scope link 
       valid_lft forever preferred_lft forever

root@ubuntu:/etc/netplan# ip r
default via 192.168.1.1 dev br1 proto static metric 100 onlink 
default via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100 
1.1.1.1 via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100 
8.8.8.8 via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100 
34.120.255.244 dev br0 proto dhcp scope link src 100.76.25.213 metric 100 
100.64.0.0/10 dev br0 proto kernel scope link src 100.76.25.213 metric 100 
100.64.0.1 dev br0 proto dhcp scope link src 100.76.25.213 metric 100 
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown 
192.168.1.0/24 dev br1 proto kernel scope link src 192.168.1.120 
192.168.100.1 dev br0 proto dhcp scope link src 100.76.25.213 metric 100 
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

root@ubuntu:/etc/netplan# bridge link
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 4 
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 4 
8: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 
11: vnet4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 100

viragomann

@eiger3970-0 said in What is the VMM Network selection for a LAN and WAN NIC:

buntu 192.168.1.120 pings the Internet (very slow connection though)

It has two routes for upstream connection. The one via the pfSense VM might fail.

VM router 192.168.1.1 pings Ubuntu and LAN devices, however not the Internet.

What is its WAN configuration and default gateway?

eiger3970 0

@viragomann
What are the 2 routes for upstream connection, I don't clearly see them?

I think these are the LAN and WAN details:
Ubuntu 22.04 Desktop > Browser > 192.168.1.1 > Enter > pfSense > Lobby > Dashboard > Interfaces > LAN 10Gbase-T <full-duplex> 192.168.1.1 track6.
Ubuntu 22.04 Desktop > Browser > 192.168.1.1 > Enter > pfSense > Lobby > Dashboard > Interfaces > WAN 10Gbase-T <full-duplex> 100.76.25.213 2406.2d40:4100:8fb2:5054:ff:fed4:d420

I think these are the Gateways details:
Ubuntu 22.04 Desktop > Browser > 192.168.1.1 > Enter > pfSense > Lobby > Dashboard > Gateways > WAN_DHCP6 fe80::200:5eff:fe00:101
Ubuntu 22.04 Desktop > Browser > 192.168.1.1 > Enter > pfSense > Lobby > Dashboard > Gateways > WAN_DHCP 100.64.0.1.

These are all default settings that appeared in pfSense after I configured Ubuntu 22.04 Desktop's Netplan and turned off NetworkManager as per this tutorial.

viragomann

@eiger3970-0

default via 192.168.1.1 dev br1 proto static metric 100 onlink
default via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100

You have the first one set manually. The latter is due to the DHCP client enabled on br0. So the bridge gets a config from the ISP router presumably.

If you want to go out via pfSense disable the DHCP client on br0 and enable it on pfSense WAN, assuming this is connected to br0.

eiger3970 0

@viragomann Thank you for the clarification.
This is what I've been trying to do, to have traffic via the vm router.
Any suggestions, as if I disable the br0's DHCP, it must need some address for a static IP?
How do I check the vm router is connected to br0?
How do I connect the vm router to br0?
How do I check the vm router's WAN is on DHCP? The vm router's Interfaces: [WAN] IPv4 Configuration Type, does say it's on DHCP, so this should be ok?

eiger3970 0

@eiger3970-0 I've configured Ubuntu 22.04 to use renderer networkd rather than NetworkManager.
I can now route the Ubuntu host via the vm router for Internet and LAN access.

However, only some Internet loads and ping 8.8.8.8 has 100% packet loss?

I think the pfSense configuration needs some details I'm missing.

Any paid support to finalise my configuration please?
I've set LAN and WAN to static IPs, but will probably fail once the ISP changes the public IP.

Patch

@eiger3970-0 said in What is the VMM Network selection for a LAN and WAN NIC:

This updated diagram might help for clarity?

That diagram looks wrong to me. Specifically
Wan side would normally be
ISP <-> Modem (Bridged router) <-> Nic0/eth0/snp3s0 <-> br0 <-> pfSenseVM (and no other VM or hypervisor)

Lan side would normally be
pfSenseVM <-> br1 <-> other VMs, Hypervisor, and Nic1/eth1/enp2s0 <-> external switch <-> Wired Lan devices, Wifi AP

So in your diagram I don't like br0 connection to VM x and VM y

Nor do I like the non specific connection of the Hypervisor to the pfsense router

The hypervisor network access should be explicitly via the Lan / br1. In Proxmox that is set by assigning an IP address to the Vbr1. Less sure how to do it directly in Ubuntu 22.04.
The hypervisor also has VM access via the VM console and Qemu but that is separate to network access

eiger3970 0

@Patch thanks, your reply seems right.
The setup is now working, but I haven’t got my head 100% around it yet.
I’m figuring out how to make a clear and correct topology for easy understanding and replication.

eiger3970 0

@eiger3970-0 I have created a new topology map.

However, I am unclear the the packet routes?
As per ip route, line 2 is the default route of this host machine Ubuntu 22.04 LTS Desktop.
100.64.0.1 came from a DHCP, but where is the DHCP from, the VM router or the ISP?

ubuntu@ubuntu:/etc/netplan$ ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master local-br1.1 state UP group default qlen 1000
    link/ether 46:9e:01:27:db:0d brd ff:ff:ff:ff:ff:ff permaddr 1c:61:b4:6d:38:4f
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 brd 100.127.255.255 scope global dynamic noprefixroute enp3s0
       valid_lft 168sec preferred_lft 168sec
    inet6 2406:2d40:4100:8fb2:7b54:ac94:277b:140f/64 scope global temporary deprecated dynamic 
       valid_lft 234sec preferred_lft 0sec
    inet6 2406:2d40:4100:8fb2:f995:e028:b158:4865/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 234sec preferred_lft 84sec
    inet6 fe80::8cc1:c5d0:5e3e:28b1/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:54:00:94:0d:bb brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: local-br1.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 2e:f6:bf:42:0c:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global noprefixroute local-br1.1
       valid_lft forever preferred_lft forever
6: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master local-br1.1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:3d:53:41 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe3d:5341/64 scope link 
       valid_lft forever preferred_lft forever
7: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master virbr0 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:a3:f6:c4 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fea3:f6c4/64 scope link 
       valid_lft forever preferred_lft forever
16: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master local-br1.1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:8d:31:06 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe8d:3106/64 scope link 
       valid_lft forever preferred_lft forever
17: vnet4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master local-br1.1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:f7:f9:e5 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fef7:f9e5/64 scope link 
       valid_lft forever preferred_lft forever
18: vnet5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master local-br1.1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:b6:35:37 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:feb6:3537/64 scope link 
       valid_lft forever preferred_lft forever

ubuntu@ubuntu:/etc/netplan$ arp -n
Address                  HWtype  HWaddress           Flags Mask            Iface
192.168.1.160            ether   3c:2a:f4:60:b5:7b   C                     local-br1.1
192.168.1.1              ether   52:54:00:3d:53:41   C                     local-br1.1
192.168.122.149          ether   52:54:00:a3:f6:c4   C                     virbr0
192.168.1.102            ether   52:54:00:8d:31:06   C                     local-br1.1
192.168.1.100            ether   1c:ca:e3:77:c5:53   C                     local-br1.1
100.64.0.1               ether   00:00:5e:00:01:01   C                     enp3s0

ubuntu@ubuntu:/etc/netplan$ ip route
default via 100.64.0.1 dev enp3s0 proto dhcp metric 102 
34.120.255.244 dev enp3s0 proto dhcp scope link metric 102 
100.64.0.0/10 dev enp3s0 proto kernel scope link src 100.76.25.213 metric 102 
169.254.0.0/16 dev virbr0 scope link metric 1000 
192.168.1.0/24 dev local-br1.1 proto kernel scope link src 192.168.1.120 metric 425 
192.168.100.1 dev enp3s0 proto dhcp scope link metric 102 
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1

eiger3970 0

@eiger3970-0 updated version of topology map.

ubuntu@ubuntu:/etc/netplan$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         _gateway        0.0.0.0         UG    102    0        0 enp3s0
244.255.120.34. 0.0.0.0         255.255.255.255 UH    102    0        0 enp3s0
100.64.0.0      0.0.0.0         255.192.0.0     U     102    0        0 enp3s0
link-local      0.0.0.0         255.255.0.0     U     1000   0        0 virbr0
192.168.1.0     0.0.0.0         255.255.255.0   U     425    0        0 local-br1.1
192.168.100.1   0.0.0.0         255.255.255.255 UH    102    0        0 enp3s0
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0

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eiger3970 0

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