Not sure if this will overlap with anyone else, but my experience was a
combination of 2 things:
1. Reboots were happening, caused by unattended-upgrade
2. The device causing trouble was a renamed device.
Turns out it was trying to get renamed twice: Once very early in boot
from eth1 to eno2,
Also observing this in 20.04.2 (kernel 5.4.0-70).
I will try swapping out physical transceivers on both ends of the link and a
new switch port...
Of particular interest to me, netplan does not appear to re-run when
this happens. I have a device renaming rule that matches on name, sets
IP, and
I second that. Seeing this on 20.04 for some reason.
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Title:
Ubuntu 18.04 networking issue (connection drops after approx. 15
minutes)
To
Also happening on 20.04
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Title:
Ubuntu 18.04 networking issue (connection drops after approx. 15
minutes)
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i have the same problem over here, i posted more details over here:
https://github.com/mailcow/mailcow-dockerized/issues/2918
i believe to reproduce the problem you can:
- set up multiple subnets under the same interface name
- make sure systemd-networkd is the only system to handle public
** Tags added: cscc
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Title:
Ubuntu 18.04 networking issue (connection drops after approx. 15
minutes)
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Summing UP all Above comments:
Ubuntu:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
this scenario is: i need to create 1000 of virtual interface , this is scale
environment, where each new
problem occurs when both interface created using multiprocessing module of
python
Process 1 execution ->
ip link add link ens34 2icx0 type macvlan
ifconfig 2icx0 up
ip addr add 192.168.49.230/16 dev 2icx0
Process 2 execution ->
ip link add link ens34 2icx1 type macvlan
ifconfig
Anyhow, none of this is a bug I nthe dispatcher, and I don't know what
else, so I'm going to reassign it to the kernel - if there are broken
ARP tables and whatnot, what else could it be.
** Package changed: networkd-dispatcher (Ubuntu) => linux (Ubuntu)
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Your logs do not show network dispatcher restarting, but it is reloading
it's list of interfaces as it has to figure out which interface it got
notified about.
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Failed Logs:
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Apr 16 10:56:27 u18_svr_madsz systemd-udevd[30948]: link_config:
autonegotiation is unset or enabled, the speed and duplex are not writable.
Apr 16 10:56:27 u18_svr_madsz systemd-udevd[30948]: Could not generate
persistent MAC address for 2icx0: No such file or directory
Apr
this scenario is: i need to create 1000 of virtual interface , this is
scale environment, where each new interface causing restart of networkd-
dispatcher, losing out on older interface, if there creation is not
completed successfully.
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Ubuntu:
No LSB modules are available.
Distributor ID: Ubuntu
Description:Ubuntu 18.04.1 LTS
Release:18.04
Codename: bionic
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root@u18_svr_madsz:/icxmSim/dist# ifconfig
ens33: flags=4163 mtu 1500
inet 10.206.49.229 netmask
networkd-dispatcher, on its own, does not configure or control network
interfaces. It listens on d-bus for events from systemd-networkd. So
this is almost certainly a symptom rather than the cause of your
interface stability issues, *unless* you have given networkd-dispatcher
some script to
** Changed in: networkd-dispatcher (Ubuntu)
Status: Expired => Confirmed
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Title:
Ubuntu 18.04 networking issue (connection drops after
@Julian - As no one seems to be doing that, I'll take the initiative and
give you the information instead.
(1) add -vv to networkd_dispatcher_args= in /etc/default/networkd-dispatcher
and restart it?
(2) include the output of networkctl list
Output of networkctl list:
$ networkctl list
IDX
[Expired for networkd-dispatcher (Ubuntu) because there has been no
activity for 60 days.]
** Changed in: networkd-dispatcher (Ubuntu)
Status: Incomplete => Expired
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Hard to admit but we had a totally different culprit: A conflict between
hardware clock and NTP sync caused dhclient dropping the interface
probably »believing« lease timeout being reached.
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Hello,
feeling very unhappy possibly joining the club. We have a current
18.04.1 x86_64 desktop system. Being an educational institution we clone
our master installation PC's image to ~80 client machines sharing
identical hardware. The subsequently described problems appear both on
our master and
The networkd-dispatcher errors are not causing your connection issues -
networkd dispatcher just starts scripts after network changes. I wonder
if the connection issues are causing the networkd-dispatcher issues.
There needs to be some more information. Could you
(1) add -vv to
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: networkd-dispatcher (Ubuntu)
Status: New => Confirmed
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** Package changed: ubuntu => networkd-dispatcher (Ubuntu)
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Title:
Ubuntu 18.04 networking issue (connection drops after approx. 15
minutes)
Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general. It is important that bug reports be filed about source
packages so that people
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