Found my mistake:
VLAN1000 did not work as expected - it's an experimental VLAN as it's still under construction, and that's what disrupted the connection. But it was used by the system for the upgrade but not for the ping and the DNS.
Posted the configurations. Anything found?I'd have to see your complete configuration [...] So the actual issue may be somewhere else than you expect.
What a pity, as it is allowed to set there numbers in winbox 0..65535. But it makes sense, having an "and 0x0007" in this function.Other than that, the priority match condition gets those three CoS bits alone, so the range of values is 0..7.