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Static Routing Configuration¶

Ubuntu 18.04 and Later (Netplan)¶

Configuration File: /etc/netplan/*.yaml¶

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: false
      addresses:
        - 192.168.1.100/24
      gateway4: 192.168.1.1
      nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4
      routes:
        - to: 10.0.0.0/8
          via: 192.168.1.254

Apply Configuration¶

# Test configuration
netplan try

# Apply configuration
netplan apply

Ubuntu 16.04 and Earlier (interfaces)¶

Configuration File: /etc/network/interfaces¶

auto eth0
iface eth0 inet static
address 192.168.1.100
netmask 255.255.255.0
gateway 192.168.1.1
dns-nameservers 8.8.8.8 8.8.4.4

# Add static route
up route add -net 10.0.0.0/8 gw 192.168.1.254
down route del -net 10.0.0.0/8 gw 192.168.1.254

Apply Configuration¶

systemctl restart networking

CentOS/RHEL¶

Using NetworkManager¶

# Check connections
nmcli con show

# Configure IP
nmcli con mod eth0 ipv4.addresses 192.168.1.100/24
nmcli con mod eth0 ipv4.gateway 192.168.1.1
nmcli con mod eth0 ipv4.dns 8.8.8.8
nmcli con mod eth0 ipv4.method manual

# Add static route
nmcli con mod eth0 +ipv4.routes "10.0.0.0/8 192.168.1.254"

# Apply configuration
nmcli con up eth0

Verify Routing¶

# Check routing table
ip route show
route -n

# Test connectivity
ping destination_IP
traceroute destination_IP