** Changed in: systemd
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1907306
Title:
networkd dhcpv4 client never attempts more than 2 renew and 2 rebind
Status in systemd:
Fix Released
Status in systemd package in Ubuntu:
In Progress
Status in systemd source package in Bionic:
In Progress
Status in systemd source package in Focal:
In Progress
Status in systemd source package in Groovy:
In Progress
Status in systemd source package in Hirsute:
In Progress
Bug description:
[impact]
networkd dhcpv4 client never attempts more than 2 renew and 2 rebind
[test case]
configure an interface to use dhcpv4; acquire a dhcpv4 address, then
stop the dhcpv4 server, and wait for the networkd client to perform
its renewals and rebinds before expiring the lease
using a 20 minute lease time as an example (all times are approximate
due to RFC-mandated random 'fuzz' time of -1 to +1 sec):
the current behavior would be to sent renew requests at:
10:00
13:45
and then rebind requests at:
17:30
18:45
then the lease would expire at 20:00
the correct/new behavior should be renew requests at:
10:00
13:45
15:37
16:37
and then rebind requests at:
17:30
18:45
19:45
and then lease expiration at 20:00.
longer lease times would increase the number of retransmissions.
[regression potential]
any regression would likely result in problems receiving and/or
maintaining a dhcpv4 address
[scope]
this is needed in b/f/g/h.
this was fixed upstream in:
https://github.com/systemd/systemd/pull/17908
that was just added, so this is not fixed in any ubuntu release yet.
technically, this is needed in x as well, however I don't plan to
backport to x since 1) it reaches ESM soon and 2) the default network
management tool in x is ifupdown, not systemd-networkd.
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