I have a mikrotik CRS226-24G-2S+ that I am seeing some weird behavior with. I have 7 or so other mikrotik devices doing some other functions without issue, but my background is not in this hardware. I have almost 20 years in service provider backbone networking and I fear that some of my assumptions based on that are causing me problems here. Hopefully you experts can teach me something and I can keep using these fantastic boxes.
Basically I have the CRS226-24G-2S+ working as a small office switch + NAT router on a small office on metro fiber. I had originally set this up as a NAT gateway with 3 bridges and vlans. I removed the wireless to reduce complexity. As it sits there are 2 vlans and 2 bridges active. Bridge / vlan 204 is our external connectivity (WAN) bridge / vlan 909 is the internal LAN. Basic filtering and DHCP, nothing even remotely complicated.
The issue I am seeing is that DHCP will occasionally take far longer than it should. Not always, but sometimes. After the DHCP process runs we see strange intermittent connectivity on the same bridge, off timeouts, almost like STP is running but not quite as timed. There are only a few hosts on this network, only one network device (this one) and no bridging on hosts. ARP seems to be ok on the mikrotik, I still have ARP on the hosts when connectivity is lost. I see nothing in the mikrotik or host lons that would indicate any odd behavior or protocol event.
Config is sanitied and pasted here for anyone willing to look and provide some input:
Any insight appreciated.