Here’s what we have captured from cisco router that connected to our mikrotik device
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 74/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is on
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:18:19, output never, output hang never
Last clearing of “show interface” counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 293182000 bits/sec, 27581 packets/sec
5 minute output rate 14097000 bits/sec, 18863 packets/sec
275303129788 packets input, 274460043202669 bytes, 0 no buffer
Received 1905930 broadcasts (193318 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 13616369 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
187822243652 packets output, 26999377806077 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 17252760 PAUSE output
0 output buffer failures, 0 output buffers swapped out
explanation of Pause Output :
Q. What is the Pause control counter?
A. The Pause control counter indicates the number of times the router requests another router to slow the traffic. For example, two routers, Router A and Router B, are connected through a link with flow control enabled. If Router B faces a traffic burst, Router B sends a Pause output packet to inform Router A to slow the traffic because the link is oversubscribed. At that time, Router A receives a Pause input packet that informs it of the request sent by Router B. Pause output / input packets are not a problem or an error. They are simply flow control packets between two devices.
So it means that the cisco router asked mikrotik to router to slow down traffic flow, by sending Pause Output packet again and again. But seems like mikrotik router does not have any flow control, so the cisco repeated the pause output packet.
Any comment?
Does mikrotik have built in flow control for the interface?