On 29.06.21 12:06, Mark Schouten wrote: > Hi, > > Op 29-06-2021 om 11:46 schreef Thomas Lamprecht: >> Do you have some FW rules regarding MAC-Addresses or the like? >> As the MAC-Address selection changed in Proxmox VE 7 due to new default >> n systemd's network link policy, as listed in our known issues[0]. > > There is no firewall configured on this cluster. On Stoiko's advice, I > changed the systemd-link-settings and now everything works again.
Ah yeah, that advice was not posted to the list initially so I did not saw that... > > I do not completely understand why that fixes it though. Commenting out > MACAddressPolicy=persistent helps, but why? > Because duplicate MAC addresses are not ideal, to say the least? I.e., quoting the second part of my original reply again: > It's now not the one of the first port anymore, but derived from interface > name and `/etc/machine-id`, which in combination should be unique but also > persistent. > > But, for some ISO releases (4.0 to 5.3) the machine-id for the installed host > was not always re-generated, which could result in duplication of a MAC for > identical named interfaces on two hosts. > We try to actively catch and fix that on upgrade by checking if the ID is one > of the known static ones (it's just a handful of possible IDs) on upgrade. > > But if one cloned an machine (e.g., a colleague run into this in a demo > virtualized PVE test clusters they cloned from a template) that ID will be > duplicated and thus make problems. > That could be easily checked by comparing the `/etc/machine-id` content and > be fixed by re-generation[1]. > _______________________________________________ pve-user mailing list [email protected] https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
