I configure RB2011 with Router OS 6.47.3. There is uplink connection with CISCO SG220-50P (from ether1 to port 49 at Cisco). I am using a Bridge with ARP: proxy-arp; Clients computers (Windows) connected to CISCO via LAN are waiting 9 minutes for leasing IP address from DHCP server at Mikrotik! Linux clients are ok.
When I switch “ARP: proxy-arp” setting to “ARP: enabled” at my Bridge, all is fine. DHCP server assigned IP address to client to 30 seconds.
When is Windows computer connected direct to Mikrotik port, DHCP work fine (ARP: proxy-arp setting).. Problem indicate only when is computer connected to LAN via Cisco sg220.