** Changed in: systemd (Ubuntu Eoan)
Status: Triaged => In Progress
** Changed in: systemd (Ubuntu Disco)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: systemd (Ubuntu Bionic)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: systemd (Ubuntu Disco)
Importance: Undecided => Medium
** Changed in: systemd (Ubuntu Bionic)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1831787
Title:
Bogus routes after DHCP lease change
Status in netplan:
Invalid
Status in systemd:
Unknown
Status in systemd package in Ubuntu:
In Progress
Status in systemd source package in Bionic:
New
Status in systemd source package in Disco:
New
Status in systemd source package in Eoan:
In Progress
Bug description:
Netplan config:
network:
version: 2
renderer: networkd
ethernets:
eno4:
dhcp4: no
eno1np0:
dhcp4: no
addresses:
- 172.16.0.2/24
bridges:
br0:
dhcp4: yes
interfaces:
- eno4
On initial boot, machine got 10.0.15.109 IP address:
May 03 13:09:41 ceph2 systemd-networkd[29349]: br0: Configured
May 03 13:09:41 ceph2 systemd-networkd[29349]: br0: DHCPv4 address
10.0.15.109/23 via 10.0.15.253
At one point, DHCP server reserver this IP address and client
eventually picked up new IP address:
May 03 15:01:12 ceph2 systemd-networkd[1137]: br0: DHCPv4 address
10.0.15.128/23 via 10.0.15.253
This resulted in IP addresses:
# ip -o a
1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever
preferred_lft forever
1: lo inet6 ::1/128 scope host \ valid_lft forever preferred_lft
forever
2: eno1np0 inet 172.16.0.2/24 brd 172.16.0.255 scope global eno1np0\
valid_lft forever preferred_lft forever
2: eno1np0 inet6 fe80::b226:28ff:fe53:56be/64 scope link \ valid_lft
forever preferred_lft forever
6: br0 inet 10.0.15.128/23 brd 10.0.15.255 scope global dynamic br0\
valid_lft 503sec preferred_lft 503sec
6: br0 inet6 fe80::b8d7:5eff:fe6b:62a/64 scope link \ valid_lft
forever preferred_lft forever
So far, everything is fine. But, the routes on the machine are bogus:
# ip r
default via 10.0.15.253 dev br0 proto dhcp src 10.0.15.109 metric 100
default via 10.0.15.253 dev br0 proto dhcp src 10.0.15.128 metric 100
10.0.14.0/23 dev br0 proto kernel scope link src 10.0.15.128
10.0.15.253 dev br0 proto dhcp scope link src 10.0.15.109 metric 100
10.0.15.253 dev br0 proto dhcp scope link src 10.0.15.128 metric 100
172.16.0.0/24 dev eno1np0 proto kernel scope link src 172.16.0.2
routes with src 10.0.15.109 should have been removed when lease was
renewed. I'm not sure if this is a bug in netplan or systemd. This is
18.04, systemd 37-3ubuntu10.21, netplan 0.40.1~18.04.4.
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