Package: cloud.debian.org Severity: important official debian/stretch64 v9.0.0 vagrant box has wrong dhcp configuration.
As far as I understand, Stretch switched to using DHCP Client Identifier (DUID) by default, which is generated from /etc/machine-ip, which should be different due to installation procedure. As Vagrant boxes have no regular installation procedure, machine_id is embedded into the box, and so, is the same for all vms and Client Identifier also. As libvirt uses that DUID for assigning IPv4 addresses, all stretch vms get the same initial IP - new one makes unusable all previously started. As DHCP client has an option to use MAC for DUID (or instead DUID?), I propose to update network config inside vagrant box to use MAC. -- System Information: Debian Release: 9.0 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-3-amd64 (SMP w/1 CPU core) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory ANSI_X3.4-1968), LANGUAGE=en_US.utf8 (charmap=locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)