Clients connected via ethernet and through SFP+ S+RJ10 ports have 100% success properly receiving static DHCP assignments. However, recently I added a client with SFP+ DAC connection, which is not receiving the static DHCP assignment consistently. Upon a single reboot, the client properly receives the correct IP. However, after a subsequent reboot 12 hours later, a new IP from the pool was assigned. Looking at the 'Leases' page in the web interface, the MAC address is the same, yet the DHCP server issues a new IP from the pool, rather than the statically assigned IP. To fix, I delete the previous static assignment and re-assign the new entry to be static.
Hardware/software details: RB4011 with RouterOS v6.48.4 is the DHCP server; CRS328 running SwOS 2.13 is the switch with the SFP+ port connected to a Mellanox X-3 PCIe card. I'm using MikroTik XS* DAC cable. Any help is appreciated - thanks in advance.