[arch-general] Dynamic IPs change after reboot when dhcpcd-9.0.1-2 installed?

David C. Rankin drankinatty at suddenlinkmail.com
Thu Apr 23 05:22:47 UTC 2020

I have noticed an issue that update of dhcpcd in the past day or two causes
the server running dhcpd to hand out a different IP. The resolv.conf is
unchanged - unlike the bug

The fact that the IP changes isn't itself a problem, the fact that it has not
behaved like this before is.

The side-effect impacts updating Arch boxes across a LAN. You may find
yourself unable to connect after a kernel update and reboot when the box comes
back up with a different IP. The problem being any local IP caching on the
machine being used to do remote updates won't see the change until the lease
expires. (or the local nameresolution cache is flushed/restarted -- depends on
box and distro used to access the remote Arch box).

Has anybody else seen this? Also, if you know, is this just a one-off change
with the new package that won't repeat each time dhcpcd or the kernel is
updated going forward?

David C. Rankin, J.D.,P.E.

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