Good evening

I have TL-SG3428MP connected to Aruba InstantOn 1930 only via one uplink whenever I have configured RSTP over both of them if let the TL-SG3428MP to be the root bridge it put the uplink in a discarding state and show as Backup or Alternative, but if I let the Aruba to be the root bridge everything goes right I have tried to change the port cost,prority and nothing had solved the problem when I checked the MAC address table over TL-SG3428MP it can see two MAC address from the uplink one is 4D:E0:53:7D:55:1E which is the Aruba MAC address and another one 4D:E0:53:7D:55:1F which does not belong to any devices over my LAN the Arub switch itself does not have any devices connected to I have capture the BPDU and the only MAC address that it can see from the Aruba is  4D:E0:53:7D:55:1E which is the MAC address of the Aruba switch itself I really need the TL-SG3428MP to be the root bridge any one can help me with that I have been searching for a solution from about a month now and I am worry beacause we are buying a new switch witch is TL-SG3428MP too I do not want to buy it if it is not compatable with Aruba switch I am sorry for saying that