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user12140050 avatar Ubuntu

How to configure routing between two network interfaces on Ubuntu

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user12140050

I am utilizing Ubuntu 20.04 running on physical standalone system as a virtual router. The device is connected to two separate NIC. One of the NIC is connected to the external network the other one is connected to a switch.

The switch is configured in the following way with 802,1q vlan

VLAN 1 -> Port 2 (untagged)
       -> Port 3 (untagged)
       -> Port 4 (untagged)
       -> Port 5 (untagged)
       -> Port 8 (untagged) [connected to virtual router]

VLAN 2 -> Port 2 (untagged)
       -> Port 3 (untagged)
       -> Port 8 (untagged)   [connected to virtual router]

VLAN 3 -> Port 4 (untagged)
       -> Port 5 (untagged)
       -> Port 8 (untagged)   [connected to virtual router]

The netplan configuration on Ubuntu 20.04

network:
  version: 2
  renderer: networkd
  ethernets:
    enp1s0f1:
      dhcp4: no
      addresses: [10.1.1.184/24]
      gateway4: 10.1.1.251
      nameservers:
        addresses: [10.1.1.22, 10.1.1.23]

    enx7cc2c64309df:
      dhcp4: no
      gateway4: 10.2.2.2
      addresses: [10.2.2.1/8]

  vlans:
      vlan.2:
        id: 2
        link: enx7cc2c64309df
      vlan.3:
        id: 3
        link: enx7cc2c64309df

I need to able to access devices running on the external network from the switch. I tried adding the following network interface

auto enx7cc2c64309df
iface enx7cc2c64309df inet static
    address 10.2.2.1
    netmask 255.0.0.0
    gateway 10.2.2.2
    up ip route add 10.1.1.0/24 via 10.1.1.251

Then ran the following command:

sudo ip link set enx7cc2c64309df up

However I am unable to ping devices running on the other device.

I am not sure if I need to setup a DHCP server or not or if my switch configuration is correct.

Any suggestion would be greatly appreciated.

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