I am using a qnx computer with a Broadcom fiber card (1000 baseSX full duplex) connected to a C3850. The light on the switch port only flashes for a couple of minutes after rebooting the qnx computer, after that it stays off. I tried two ports and I have the same result, the port configuration and status are showing below. I know that the Broadcom fiber card is working because I used a Fiber optical media converter and connected to another computer and the link is up.
Broadcom <- fiber-> media converter <-Ethernet-> 2nd computer.
I also used the media converter to connect the second computer to the switch and the link is up.
2nd compuer <-Ethernet-> media converter <-Fiber-> C3850
The qnx computer also has a Ethernet card which I connected to the media converter into the switch and the link is up.
Qnx computer <-Ethernet-> media converter <-Fiber-> C3850.
Only when the there is a connection from the Broadcom to the switch the communication drops.
Does any body know what can be the root of the issue?
TenGigabitEthernet1/0/3 is down, line protocol is down (notconnect)
switchport mode access
spanning-tree portfast
Hardware is Ten Gigabit Ethernet, address is cc98.91d6.cf03 (bia cc98.91d6.cf03)
Description: Element Manager A
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
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
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
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
TenGigabitEthernet1/0/4 is down, line protocol is down (notconnect)
Hardware is Ten Gigabit Ethernet, address is cc98.91d6.cf04 (bia cc98.91d6.cf04)
Description: Element Manager B
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 3136 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 49 pause input
0 input packets with dribble condition detected
10104 packets output, 9766160 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
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
