Add static routes to Ubuntu under Netplan
If you’re on the 10.40.24.0 network, the route target would be 10.40.24.250. If you’re on the 10.40.28.0 network, it’s 10.40.28.250, and so on. The 10.40.28.0 network is used in this experiment.
- Edit the /etc/netplan/01-netcfg.yaml file.
Here is an example from skayal.com.
network:
version: 2
renderer: networkd
ethernets:
eth0:
addresses: [ 10.40.28.108/24 ]
gateway4: 10.40.28.1
nameservers:
search: [ skayal.com ]
addresses:
- 208.82.128.10
- 208.82.128.2
routes:
- to: 10.10.0.0/16
via: 10.40.28.250
- to: 10.20.0.0/16
via: 10.40.28.250
- Save your changes
netplan tryYou should see the routes in the kernel routing table:
# netstat -nrKernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 10.40.28.1 0.0.0.0 UG 0 0 0 eth0
10.10.0.0 10.40.28.250 255.255.0.0 UG 0 0 0 eth0
10.20.0.0 10.40.28.250 255.255.0.0 UG 0 0 0 eth0
10.40.28.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
3. Now try a ping test either direction.
$ ping 10.40.28.108
PING 10.40.28.108 (10.40.28.108): 56 data bytes
64 bytes from 10.40.28.108: icmp_seq=0 ttl=60 time=27.549 ms
64 bytes from 10.40.28.108: icmp_seq=1 ttl=60 time=27.277 ms
64 bytes from 10.40.28.108: icmp_seq=2 ttl=60 time=27.571 ms
64 bytes from 10.40.28.108: icmp_seq=3 ttl=60 time=27.597 ms
64 bytes from 10.40.28.108: icmp_seq=4 ttl=60 time=29.772 ms
64 bytes from 10.40.28.108: icmp_seq=5 ttl=60 time=26.666 ms
64 bytes from 10.40.28.108: icmp_seq=6 ttl=60 time=29.389 ms
64 bytes from 10.40.28.108: icmp_seq=7 ttl=60 time=27.083 ms
64 bytes from 10.40.28.108: icmp_seq=8 ttl=60 time=30.078 ms
^C
--- 10.40.28.108 ping statistics ---
9 packets transmitted, 9 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 26.666/28.109/30.078/1.201 ms