Public bug reported:
This issue was reported at
https://github.com/systemd/systemd/issues/17012
**Used distribution**
> Ubuntu 20.04.1 LTS
**systemd version the issue has been seen with**
> 245.4-4ubuntu3.2
**Issue details**
I configured 255 IPv4 address (including primary IP) using netplan but when the
server restart, it time out on configuring the interface. If I limit total
IPv4 addresses to 181 or less, it works. But anything larger than 181 fails.
Below are my configurations and error logs.
**/etc/netplan/10-ens3.yaml**
```
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: no
addresses:
- 140.XX.XX.XX/23
- 103.XXX.XX.1/24
- 103.XXX.XX.2/24
- CONTINUED IP ADDRESS UPTO BELOW ...
- 103.XXX.XX.254/24
gateway4: 140.XX.XX.X
nameservers:
addresses: [1.1.1.1, 1.0.0.1]
routes:
- to: 169.254.0.0/16
via: 140.XX.XX.X
metric: 100
```
The above config works if I run `netplan apply` but when I reboot, it does not
work.
**networkctl**
```
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 ens3 ether routable failed
2 links listed.
```
**/etc/systemd/system/systemd-networkd.service.d/override.conf**
```
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug
```
**systemctl status systemd-networkd.service**
```
● systemd-networkd.service - Network Service
Loaded: loaded (/lib/systemd/system/systemd-networkd.service;
enabled-runtime; vendor preset: enabled)
Drop-In: /etc/systemd/system/systemd-networkd.service.d
└─override.conf
Active: active (running) since Thu 2020-09-10 19:46:58 UTC; 1min 36s ago
Docs: man:systemd-networkd.service(8)
Main PID: 346 (systemd-network)
Status: "Processing requests..."
Tasks: 1 (limit: 1074)
Memory: 3.8M
CGroup: /system.slice/systemd-networkd.service
└─346 /lib/systemd/systemd-networkd
Sep 10 19:47:03 test-server systemd-networkd[346]: NDISC: Sent Router
Solicitation, next solicitation in 7s
Sep 10 19:47:11 test-server systemd-networkd[346]: NDISC: No RA received before
link confirmation timeout
Sep 10 19:47:11 test-server systemd-networkd[346]: NDISC: Invoking callback for
'timeout' event.
Sep 10 19:47:11 test-server systemd-networkd[346]: NDISC: Sent Router
Solicitation, next solicitation in 15s
Sep 10 19:47:23 test-server systemd-networkd[346]: Assertion 'm->sealed' failed
at src/libsystemd/sd-netlink/netlink-message.c:582, function
netlink_message_read_internal(). Ignoring.
Sep 10 19:47:23 test-server systemd-networkd[346]: ens3: Could not set address:
Connection timed out
Sep 10 19:47:23 test-server systemd-networkd[346]: ens3: Failed
Sep 10 19:47:23 test-server systemd-networkd[346]: ens3: State changed:
configuring -> failed
Sep 10 19:47:23 test-server systemd-networkd[346]: Sent message type=signal
sender=n/a destination=n/a path=/org/freedesktop/network1/link/_32
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=13
reply_cookie=0 signature=sa{sv}as error-name=n/a error-message=n/a
Sep 10 19:47:23 test-server systemd-networkd[346]: NDISC: Stopping IPv6 Router
Solicitation client
```
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1930738
Title:
network configuration failed on reboot
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