sniff traffic...Is there any chance to know the mac address of computers connected to the ethernet interfaces of CRS-s, even better the IP address ?
Kind of a workaround, but shouldn't the switch learn the mac addresses of the devices attached to it? This information got to be somewhere on it . MikroTik could kindly make it available.Create a bridge and put the port in question on it.
It will allow you to see the MACs under bridge/hosts.
I don't think that collecting 24 mac addresses is that much resource hungry. If the switch can survive a bridge interface, which is a "software" interface, and gather information from it, then ...The information is "in" it, the problem is, can it be read from the switch chip, and if yes, what amount of resources would it require...