I have to correct myself. The issue re-appeared after the downgrade a bit later again.
Meanwhile I updated again last evening and until now it works again. It's really weird but maybe unrelated to the RouterOS version while I really have no clue.
Yes, that is what I expected. It is usual for those problems to appear after reboots, and a reboot is part of an upgrade or downgrade.
Is there any way to check the integrity of the bootloader that netinstall uses to format the flash and launch the firmware? (I mean, if we can find the device by its MAC address, it means there's some kind of unchangeable bootloader in the device that accepts connections via TFTP and allows formatting the flash drive and uploading an NPK, but the bootloader itself stays the same, right?)
For example, if this bootloader is infected (or am I just being paranoid?), it could accept the NPK, unpack it, inject malicious files, and tell netinstall "all good, restored."
Maybe netinstall has a way to verify that the bootloader, which is being used to format the flash and upload the NPK and so on, isn’t compromised?
There is also a "backup bootloader". I guess it could be compromised as well, but seeing how difficult it is to update that one when you need to, the likelyhood is probably small.
I encountered issues with this on my rb5009... coming from 7.22.2. dhcp client configured on ether1, my isp is spectrum (charter), cable modem (motorola mb8611). after the upgrade to 7.23, the system still had an IP on the interface from the provider, but no traffic would flow over it. A release/renew had no effect. A reboot of the modem did not work. Downgrading back to 7.22.x and a modem power cycle resulted in everything coming back.
Seems like a similar situation reported by atleast one other user (with rogers in canada). supout and packet captures submitted to support..
OSPF Memory Leak. Im looking at a site that has upgraded from 7.18 to 7.23 and we are seeing OOM errors and Kernal Panics. Supout shows OSPF Memory usage getting above 2Gb on a CCR2004.
While there may be some config issues/optimisation in the OSPF we are going to address, these did not cause the Router to crash prior to its upgrade.
Has anyone else seen similar issues please ?
Version 7.23.1 has been released:
Meanwhile I think I figured it out.
It was most likely IPv6 based and the issue was that suddenly my clients had multiple IPv6 default routes. It turned out that my CAPsMAN APs in the network sincd 7.23 send out RA even if they are not supposed to and advertisement in IPv6 address set up is set to no.
I now disabled IPv6 forward on such devices hoping I didn't break anything else and so far I believe the issue is resolved. But still RA should not be sent if advertise is "no"?
Is that a new issue in 7.23? Meanwhile running 7.23.1 but still the same issue.
Was advertise already "no" or did you change that? Because it may be necessary to reboot after such changes.
I did not touch anything before so it was already "no".
Downgrade to 7.21 LTS solved this leak issue.