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#1 2020-10-18 16:32:52
- Mr Green
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- Registered: 2003-12-21
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Network taking a long time to start [Nearly Solved]
Recently noticed that Network Manager was taking a long time to start, mostly the dispatcher script. So I switched too systemd-networkd.
Got this:
systemd-analyze blame
17.570s dhcpcd@enp2s0.service
5.305s systemd-networkd-wait-online.service
757ms lvm2-monitor.service
543ms dev-sda2.device
400ms systemd-random-seed.service
390ms systemd-journal-flush.service
272ms systemd-journald.service
269ms systemd-udevd.service
265ms systemd-networkd.service
229ms systemd-logind.service
220ms org.cups.cupsd.service
103ms user@1000.service
93ms systemd-udev-trigger.service
84ms lm_sensors.service
70ms systemd-modules-load.service
61ms systemd-fsck@dev-disk-by\x2duuid-6ca51681\x2dff04\x2d4cec\x2d8622\x2d82f7472e25e6.service
61ms systemd-fsck@dev-disk-by\x2duuid-5BEC\x2d1713.service
50ms modprobe@drm.service
47ms colord.service
44ms boot.mount
32ms systemd-boot-system-token.service
32ms systemd-tmpfiles-setup.service
30ms systemd-tmpfiles-setup-dev.service
19ms dev-hugepages.mount
18ms dev-mqueue.mount
17ms sys-kernel-debug.mount
16ms sys-kernel-tracing.mount
15ms kmod-static-nodes.service
14ms systemd-user-sessions.service
14ms tmp.mount
12ms home.mount
10ms systemd-update-utmp.service
10ms user-runtime-dir@1000.service
9ms systemd-sysctl.service
8ms systemd-remount-fs.service
4ms sys-fs-fuse-connections.mount
4ms sys-kernel-config.mount Really not much better, not sure why a simple wired connection would take so long. Either I have an issue with dhcpcd or resolving. Not really bothered once system is up and running but system never used to boot so slowly.
Any ideas?
Last edited by Mr Green (2020-10-21 16:37:25)
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#2 2020-10-18 16:39:04
- V1del
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- Registered: 2012-10-16
- Posts: 23,944
Re: Network taking a long time to start [Nearly Solved]
You are not supposed to have dhcpcd started or running when you use networkmanager or systemd-networkd for that matter.
https://wiki.archlinux.org/index.php/Ne … k_managers note the blue box and the mention of either of these two solutions using their own dhcp clients.
Last edited by V1del (2020-10-18 16:39:46)
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#3 2020-10-19 01:48:18
- rsmarples
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- Registered: 2009-05-12
- Posts: 287
Re: Network taking a long time to start [Nearly Solved]
You are not supposed to have dhcpcd started or running when you use networkmanager or systemd-networkd for that matter
Or vice versa
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#4 2020-10-19 10:41:24
- Mr Green
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Re: Network taking a long time to start [Nearly Solved]
That explains everything, used to run netctl (many moons ago). Do know you should not have anything else running so assumed (quite wrongly) that dhcpcd was started by them.
Marking as solved ;-)
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#5 2020-10-21 16:26:00
- Mr Green
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- Registered: 2003-12-21
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Re: Network taking a long time to start [Nearly Solved]
I have disabled
dhcpcd@enp2s0.service But on reboot service reappears.
systemctl --type=service
UNIT LOAD ACTIVE SUB DESCRIPTION >
colord.service loaded active running Manage, Install and Generate Color Profiles >
dbus.service loaded active running D-Bus System Message Bus >
dhcpcd@enp2s0.service loaded active running dhcpcd on enp2s0 >
getty@tty1.service loaded active running Getty on tty1 >
haveged.service loaded active running Entropy Daemon based on the HAVEGE algorithm >
kmod-static-nodes.service loaded active exited Create list of static device nodes for the current kernel >
lm_sensors.service loaded active exited Initialize hardware monitoring sensors >
lvm2-lvmetad.service loaded active running LVM2 metadata daemon >
lvm2-monitor.service loaded active exited Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polli>
● NetworkManager-wait-online.service loaded failed failed Network Manager Wait Online >
NetworkManager.service loaded active running Network Manager >
ntpd.service loaded active running Network Time Service >
org.cups.cupsd.service loaded active running CUPS Scheduler >
polkit.service loaded active running Authorization Manager >
sshd.service loaded active running OpenSSH Daemon >
systemd-boot-system-token.service loaded active exited Store a System Token in an EFI Variable >
systemd-fsck@dev-disk-by\x2duuid-5BEC\x2d1713.service loaded active exited File System Check on /dev/disk/by-uuid/5BEC-1713 >
systemd-fsck@dev-disk-by\x2duuid-6ca51681\x2dff04\x2d4cec\x2d8622\x2d82f7472e25e6.service loaded active exited File System Check on /dev/disk/by-uuid/6ca51681-ff04-4cec-8622-82f7472e25e6>
systemd-journal-flush.service loaded active exited Flush Journal to Persistent Storage >
systemd-journald.service loaded active running Journal Service >
systemd-logind.service loaded active running User Login Management >
systemd-modules-load.service loaded active exited Load Kernel Modules >
systemd-random-seed.service loaded active exited Load/Save Random Seed >
systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems >
systemd-sysctl.service loaded active exited Apply Kernel Variables >
systemd-tmpfiles-setup-dev.service loaded active exited Create Static Device Nodes in /dev >
systemd-tmpfiles-setup.service loaded active exited Create Volatile Files and Directories >
systemd-udev-trigger.service loaded active exited Coldplug All udev Devices >
systemd-udevd.service loaded active running Rule-based Manager for Device Events and Files >
systemd-update-utmp.service loaded active exited Update UTMP about System Boot/Shutdown >
systemd-user-sessions.service loaded active exited Permit User Sessions >
user-runtime-dir@1000.service loaded active exited User Runtime Directory /run/user/1000
user@1000.service loaded active running User Manager for UID 1000 >Only have Network Manager running....
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#6 2020-10-21 16:36:44
- Mr Green
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Re: Network taking a long time to start [Nearly Solved]
So I re read wiki and found that I have dhcpcd installed instead of dhclient... once I removed dhcpcd and installed dhclient boot time dropped too 10 seconds. However wait online is failing (need to look into that)
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#7 2020-10-25 15:42:49
- rsmarples
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- Registered: 2009-05-12
- Posts: 287
Re: Network taking a long time to start [Nearly Solved]
dhcpcd will ARP check the offered IP address by default, dhclient wont.
If speed is your thing then you can add noarp to /etc/dhcpcd.conf and watch it work just as quickly as dhclient - and let the potential for IP address conflict begin!
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