| 2020-04-14 03:37:04 |
Rafael David Tinoco |
description |
When netplan configures dhcp4-overrides and set "use-routes" to false, systemd-networkd should be configured with UseRoutes=false. It is. Unfortunately looks like systemd-networkd is not honoring it and configuring the default gateways for the interfaces no matter what.
----
$ sudo cat /etc/netplan/50-cloud-init.yaml
network:
ethernets:
enp5s0:
match:
macaddress: 00:16:3e:af:c4:d6
set-name: eth0
dhcp4: true
dhcp-identifier: mac
enp6s0:
match:
macaddress: 00:16:3e:50:11:9c
set-name: iscsi01
dhcp4: true
dhcp-identifier: mac
dhcp4-overrides:
use-routes: false
enp7s0:
match:
macaddress: 00:16:3e:b3:cc:50
set-name: iscsi02
dhcp4: true
dhcp-identifier: mac
dhcp4-overrides:
use-routes: false
version: 2
renderer: networkd
----
$ cat /var/run/systemd/network/10-netplan-enp6s0.network
[Match]
MACAddress=00:16:3e:50:11:9c
Name=iscsi01
[Network]
DHCP=ipv4
LinkLocalAddressing=ipv6
[DHCP]
ClientIdentifier=mac
RouteMetric=100
UseMTU=true
UseRoutes=false
--
$ ip route show | grep default
default via 10.250.93.1 dev iscsi02 proto dhcp src 10.250.93.101 metric 100
default via 10.250.94.1 dev iscsi01 proto dhcp src 10.250.94.167 metric 100
default via 10.250.97.1 dev eth0 proto dhcp src 10.250.97.123 metric 100 |
When netplan configures dhcp4-overrides and set "use-routes" to false, systemd-networkd should be configured with UseRoutes=false. It is. Unfortunately looks like systemd-networkd is not honoring it and configuring the default gateways for the interfaces no matter what.
Ubuntu Focal: systemd: 245.4-2ubuntu1
----
$ sudo cat /etc/netplan/50-cloud-init.yaml
network:
ethernets:
enp5s0:
match:
macaddress: 00:16:3e:af:c4:d6
set-name: eth0
dhcp4: true
dhcp-identifier: mac
enp6s0:
match:
macaddress: 00:16:3e:50:11:9c
set-name: iscsi01
dhcp4: true
dhcp-identifier: mac
dhcp4-overrides:
use-routes: false
enp7s0:
match:
macaddress: 00:16:3e:b3:cc:50
set-name: iscsi02
dhcp4: true
dhcp-identifier: mac
dhcp4-overrides:
use-routes: false
version: 2
renderer: networkd
----
$ cat /var/run/systemd/network/10-netplan-enp6s0.network
[Match]
MACAddress=00:16:3e:50:11:9c
Name=iscsi01
[Network]
DHCP=ipv4
LinkLocalAddressing=ipv6
[DHCP]
ClientIdentifier=mac
RouteMetric=100
UseMTU=true
UseRoutes=false
--
$ ip route show | grep default
default via 10.250.93.1 dev iscsi02 proto dhcp src 10.250.93.101 metric 100
default via 10.250.94.1 dev iscsi01 proto dhcp src 10.250.94.167 metric 100
default via 10.250.97.1 dev eth0 proto dhcp src 10.250.97.123 metric 100 |
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