Questions[nic](ubuntu)

I need help with a (simple) network configuration with netplan. It is very simple, I have 2 NICs: enp5s0 is ethernet and give access to the company network, and wlp4s0 is WiFi and give access to Internet via a router.

I just want the Internet traffic to be routed via the WiFi connection. The netplan configuration should be something like:

network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp5s0:
      dhcp4: true
      routes:
        - to: 192.168.1.0/24
          via: 192.168.1.1
  wifis:
    wlp4s0:
      dhcp4: true
      access-points:
        "My WiFi Network":
          password: "foobar"
      gateway4: 10.128.128.128
      routes:
        - to: 0.0.0.0/0
          via: 10.128.128.128

But it is not working. Surprisingly it is very easy to add the routes from the command line:

sudo route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev enp5s0
sudo route del default gw 192.168.1.1
sudo route add default gw 10.128.128.128

And this works like a charm. I just want to do that with netplan...

I'm trying to reinstall an Ubuntu server to 18.04.

I discovered that 18.04 uses Netplan, and I'm having trouble creating a bond interface using this.

Updated configuration:

############# BOND - VLAN ##################
network:
    version: 2
    renderer: networkd
    ethernets:
        switchports:
            match: {name: "ens*"}
    bonds:
        bond0:
            interfaces: [switchports]
            parameters:
                mode: balance-alb
    vlans:
        inet:
            id: 50
            link: bond0
            addresses: [X.X.X.X/24]
            gateway4: X.X.X.252
            dhcp4: no
            nameservers:
                addresses: [X.X.X.33]

It seems that I shouldn't have 2 match statements and ens* in a single statement did it - I'll clean this up when I get it to work..

I have installed ifenslave & bridge-utils as someone suggested this, still nothing.

Also I've enabled the bonding module in /etc/modules.

My original issue was that the interface was in UP state, but I could only ping the interface itself, not anything else.

I couldn't get this to work, so I ended up renaming the /etc/netplan/<name>.yaml file and installing ifupdown.

If anyone has a clue as to why this didn't work, I'll be happy to know :)

How to translate what we had to do to have 2 independent stream of traffic on 2 or more NIC interfaces with the new netplan.io + systemd-networkd?

auto ens2
iface ens2 inet static
address 192.168.5.100
netmask 255.255.255.0
gateway 192.168.5.1
dns-nameservers 1.1.1.1

auto ens3
iface ens3 inet static
address 192.168.3.15
netmask 255.255.255.0


up ip route add default table 102 dev ens3 via 192.168.3.1
up ip rule add from 192.168.3.0/24 lookup 102
down ip rule del from 192.168.3.0/24
down ip route del default table 102 via 192.168.3.1

Here is the layout of my local network:

Client (Running Ubuntu 17.10).

Server (Running Ubuntu Server 16.04).

Simplified ASCII art of my network:

Client~~~~~~~Server
  |            |
  |            |
  |---switch---|
         |
         |
       modem
         |
         |
     internet

~~~~~ 10G connection
----- 1G connection
  |   1G connection

So I have a client and server that are both connected to a 1G switch that is connected to the internet. They use this switch to access other things on my LAN as well as the outside world.

Both the server and client have 10G cards (in addition to separate 1G NICs - which are connected to the switch).

What I am trying to accomplish is to have these two machines use the 10G connection between them when they talk to each other, but then use the 1G connection to go everywhere else. The reason for doing this is because I only have these two 10G machines and have no need for a switch yet.

Is this possible?

Here is what I have got so far:

Client output (trimmed to relevant interface):

$ ifconfig
enp2s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
    inet 10.0.0.1  netmask 255.255.255.0  broadcast 10.0.0.255
    ether 2c:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Client /etc/network/interfaces file:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
    iface lo inet loopback

auto enp2s0
    iface enp2s0 inet static
    address 10.0.0.1
    netmask 255.255.255.0

Client output (trimmed to relevant interface):

$ sudo lshw -class network
*-network                 
   description: Ethernet interface
   physical id: 0
   bus info: pci@0000:02:00.0
   logical name: enp2s0
   version: 02
   serial: 2c:xx:xx:xx:xx:xx
   capacity: 10Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pciexpress pm msix msi vpd bus_master cap_list rom ethernet physical tp 100bt-fd 1000bt-fd 10000bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=atlantic driverversion=1.5.345.0 duplex=full firmware=1.5.44 ip=10.0.0.1 latency=0 link=no multicast=yes port=twisted pair
   resources: irq:36 memory:fb840000-fb84ffff memory:fb850000-fb850fff memory:fb400000-fb7fffff memory:fb800000-fb83ffff

Server output (trimmed to relevant interface):

$ ifconfig
veth4945bd1 Link encap:Ethernet  HWaddr 2e:xx:xx:xx:xx:xx  
      inet addr:10.0.0.2  Bcast:10.0.0.255  Mask:255.255.255.0
      inet6 addr: fe80::2c6f:1dff:feae:6e89/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:1032 errors:0 dropped:0 overruns:0 frame:0
      TX packets:197236 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:9966154 (9.9 MB)  TX bytes:15130407 (15.1 MB)

Server /etc/network/interfaces file:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
    iface lo inet loopback

# The primary network interface
auto enp4s0
    iface enp4s0 inet dhcp

auto veth4945bd1
    iface veth4945bd1 inet static
    address 10.0.0.2
    netmask 255.255.255.0

Server output (trimmed to relevant interface):

*-network:0
   description: Ethernet interface
   physical id: 1
   logical name: veth4945bd1
   serial: 2e:xx:xx:xx:xx:xx
   size: 10Gbit/s
   capabilities: ethernet physical
   configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full ip=10.0.0.2 link=yes multicast=yes port=twisted pair speed=10Gbit/s

So I have assigned a static IP to my client of 10.0.0.1 and my server as 10.0.0.2, both on submask 255.255.255.0.

When I ping server from client I just get the following:

$ ping 10.0.0.2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
From 10.0.0.1 icmp_seq=1 Destination Host Unreachable

Similar error for server to client.

My 1G connections are unaffected and work just fine still.

Please ask if you need more info, I'm at a loss as to why this doesn't work.

Is there a command that I can verify by its output the speed of my NIC and some information about its characteristics such as duplex full or half .