nutmeg's blog

Some time ago my computer stopped booting fast, it was stuck for about 10 seconds at Wait for Network to be Configured. Which seemed strange, since I am using systemd-networkd with a simple static configuration.

[Match]
Name=enp2s*

[Network]
Address=10.0.0.140/8
Gateway=10.0.0.138

Debugging showed the expected quick network setup followed by "NDISC":

Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Flags change: +LOWER_UP +RUNNING
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Gained carrier
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Setting addresses
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Updating address: 10.0.0.140/8 (valid forever)
Dez 31 15:39:02 argenau systemd-timesyncd[368]: Network configuration changed, trying to establish connection.
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Addresses set
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Setting routes
Dez 31 15:39:02 argenau systemd-networkd[279]: enp2s0: Routes set
Dez 31 15:39:02 argenau kernel: r8169 0000:02:00.0 enp2s0: link up
Dez 31 15:39:02 argenau kernel: IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready
Dez 31 15:39:03 argenau systemd-timesyncd[368]: Synchronized to time server 194.177.151.10:123 (0.debian.pool.ntp.org).
Dez 31 15:39:04 argenau systemd-networkd[279]: enp2s0: Adding address: fe80::dacb:8aff:fecb:9db/64 (valid forever)
Dez 31 15:39:04 argenau systemd-networkd[279]: enp2s0: Gained IPv6LL
Dez 31 15:39:04 argenau systemd-networkd[279]: enp2s0: Discovering IPv6 routers
Dez 31 15:39:04 argenau systemd-networkd[279]: NDISC: Started IPv6 Router Solicitation client
Dez 31 15:39:04 argenau systemd-networkd[279]: NDISC: Sent Router Solicitation, next solicitation in 4s
Dez 31 15:39:08 argenau systemd-networkd[279]: NDISC: Sent Router Solicitation, next solicitation in 7s
Dez 31 15:39:16 argenau systemd-networkd[279]: NDISC: Sent Router Solicitation, next solicitation in 15s
Dez 31 15:39:16 argenau systemd-networkd[279]: NDISC: No RA received before link confirmation timeout
Dez 31 15:39:16 argenau systemd-networkd[279]: NDISC: Invoking callback for 't'.
Dez 31 15:39:16 argenau systemd-networkd[279]: enp2s0: Configured
Dez 31 15:39:16 argenau systemd-networkd-wait-online[290]: ignoring: lo
Dez 31 15:39:16 argenau systemd[1]: Started Wait for Network to be Configured.
Dez 31 15:39:16 argenau systemd[1]: Reached target Network is Online.

Given that I am not running a local IPv6 network I have simply added IPv6AcceptRA=no to the [Network]-stanza and bootup is fast again.