I have no drops or errors on my cisco switch. There is it port configuration
interface GigabitEthernet2/1
description a05-nas01 uplink local
no ip address
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 7,54,2200-2279
switchport mode trunk
spanning-tree portfast
sh int gi2/1
GigabitEthernet2/1 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is fcfc.458d.acac (bia fcfc.458d.acac)
Description: a05-nas01 uplink local
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 64/255, rxload 62/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s, media type is T
input flow-control is off, output flow-control is on
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:49, output 00:00:43, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 2133
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 245293000 bits/sec, 49719 packets/sec
5 minute output rate 251965000 bits/sec, 52171 packets/sec
119410095471 packets input, 84457781207870 bytes, 0 no buffer
Received 7823151 broadcasts (7714038 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
123184253878 packets output, 85537960094890 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
and the mikrotik port configuration and statistic
/interface ethernet
set 0 arp=enabled auto-negotiation=yes cable-settings=default comment="" disable-running-check=yes disabled=no full-duplex=yes mac-address=00:15:17:FA:CF:89 mtu=1500 name=uplink speed=1Gbps
/interface vlan
...
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_248 use-service-tag=no vlan-id=2272
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_249 use-service-tag=no vlan-id=2273
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_250 use-service-tag=no vlan-id=2274
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_251 use-service-tag=no vlan-id=2275
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_252 use-service-tag=no vlan-id=2276
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_253 use-service-tag=no vlan-id=2277
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_254 use-service-tag=no vlan-id=2278
add arp=enabled comment="" disabled=no interface=uplink mtu=1500 name=127_255 use-service-tag=no vlan-id=2279
interface ethernet monitor 0 once
status: link-ok
auto-negotiation: done
rate: 1Gbps
full-duplex: yes
default-cable-setting: standard
Sorry I can't understand what you mean I must to try next. Could you post a config?