[c-nsp] flashing green/amber light on WS-C2970G-24TS-E

[Lynn Emerson]

Dear all,

Im been facing flashing green/amber light on sfp gb interface. However there is no collisions, errors or crc problem. The link is working perfectly well. Im running out of idea what could be the problem. Show logs show no error.  Any suggestion what could be the problem?


sh int gi0/28
GigabitEthernet0/28 is up, line protocol is up (connected)
  Description: -
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
     reliability 255/255, txload 19/255, rxload 30/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, link type is force-up, media type is LX
  output flow-control is off, input flow-control is off
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 117918000 bits/sec, 26677 packets/sec
  5 minute output rate 76322000 bits/sec, 32481 packets/sec
     208002093 packets input, 2438859250 bytes, 0 no buffer
     Received 281302 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 149178 multicast, 0 pause input
     0 input packets with dribble condition detected
     266283554 packets output, 2306958629 bytes, 0 underruns
     0 output errors, 0 collisions, 1 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


Thanks!
Lynn