Good afternoon.
I work at Arrow Electronics with RMA issues concerning Network Equipment and have been able to identify certain known counterfeit Cisco modules. At the moment, I have a returned WS-C3750-24PS-S switch, s/n CAT0850N2SA, that our customer insists is a counterfeit piece. Counterfeit modules I can believe, but this would be my first encounter with a counterfeit unit.
All tests show this switch to be true Cisco, including loop testing the GBIC ports with Cisco GLC-SX-MM SFP GBICs. The IBM loop-back plugs (p/n 11P3847) I generally use come back with a loop-back error (shown below), but the 6' length of fibre, looping port GigabitEthernet1/0/1 to port GigabitEthernet1/0/2 tests clean (also below):
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Switch#
00:07:17: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet1/0/1.
00:07:17: %PM-4-ERR_DISABLE: loopback error detected on Gi1/0/1, putting Gi1/0/1 in err-disable state
00:07:24: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to up
00:07:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up
00:07:27: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet1/0/2.
00:07:27: %PM-4-ERR_DISABLE: loopback error detected on Gi1/0/2, putting Gi1/0/2 in err-disable state
00:07:28: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
00:07:29: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to down
00:09:39: %GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in port 65537 has bad crc
Switch#
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Switch#
00:14:26: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
00:14:26: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to up
00:14:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
00:14:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up
Switch#
Switch#sh int GigabitEthernet1/0/1
00:14:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
GigabitEthernet1/0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d9f4.2681 (bia 0012.d9f4.2681)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is SX
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:03, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
9 packets input, 933 bytes, 0 no buffer
Received 4 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 4 multicast, 0 pause input
0 input packets with dribble condition detected
26 packets output, 2021 bytes, 0 underruns
0 output errors, 0 collisions, 7 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
Switch#
Switch#sh int GigabitEthernet1/0/2
GigabitEthernet1/0/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d9f4.2682 (bia 0012.d9f4.2682)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is SX
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:08, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
30 packets input, 2277 bytes, 0 no buffer
Received 25 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 25 multicast, 0 pause input
0 input packets with dribble condition detected
10 packets output, 997 bytes, 0 underruns
0 output errors, 0 collisions, 5 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
Switch#
Switch#
Switch#
Switch#sh int GigabitEthernet1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d9f4.2681 (bia 0012.d9f4.2681)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is SX
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:11, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
14 packets input, 1283 bytes, 0 no buffer
Received 6 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 6 multicast, 0 pause input
0 input packets with dribble condition detected
50 packets output, 3587 bytes, 0 underruns
0 output errors, 0 collisions, 7 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
Switch#
Switch#sh int GigabitEthernet1/0/2
GigabitEthernet1/0/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d9f4.2682 (bia 0012.d9f4.2682)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is SX
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:06, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
55 packets input, 3907 bytes, 0 no buffer
Received 46 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 46 multicast, 0 pause input
0 input packets with dribble condition detected
16 packets output, 1411 bytes, 0 underruns
0 output errors, 0 collisions, 5 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
Switch#
Switch#
00:15:54: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
00:15:54: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down
00:15:54: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
00:15:55: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to down
00:15:55: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
Switch#
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Am I correct in assuming this is a genuine Cisco unit, or did I miss something?
