Hi all,
I have a problem with a 3750X and SFP-ports that are unusable. This particular switch was recently installed in a stack with two other switches of the exact same type together with an older 3750. But since I couldn’t find a solution to the problem, I removed the switch from the stack in order to perform tests. The stack (switch 1-3) has been working for at least two years without problems.
All switch diagnostic tests report “successful” and resetting the switch changes nothing.
Port 1-12 are unusable and port 13-24 works perfectly.
Stack info (show version)
1 52 WS-C3750-48TS 12.2(55)SE5 C3750-IPBASEK9-M
2 30 WS-C3750X-24S 12.2(55)SE5 C3750E-IPBASEK9-M
3 30 WS-C3750X-24S 12.2(55)SE5 C3750E-IPBASEK9-M
4 30 WS-C3750X-24S 12.2(55)SE5 C3750E-IPBASEK9-M (problem switch)
Scenario
Install an SFP module (Cisco LX, SMF) in port 12 and 13.
First, all ports are empty.
Show run:
!
interface GigabitEthernet4/0/12
!
interface GigabitEthernet4/0/13
!
Show interfaces status:
Gi4/0/12 notconnect 1 auto auto Not Present
Gi4/0/13 notconnect 1 auto auto Not Present
Now I put an SFP in port 13
*Mar 1 17:18:37.683: %LINK-3-UPDOWN: Interface GigabitEthernet4/0/13, changed state to up
*Mar 1 17:18:38.690: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/0/13, changed state to up
Show interfaces status:
Gi4/0/12 notconnect 1 auto auto Not Present
Gi4/0/13 connected 1 full 1000 1000BaseLX SFP
show controllers ethernet-controller gi 4/0/13 phy detail:
GigabitEthernet4/0/13 (gpn: 175, port-number: 13)
-----------------------------------------------------------
General SFP Information
-----------------------------------------------
Identifier : 0x03
Connector : 0x07
Transceiver : 0x00 0x00 0x00 0x02 0x12 0x00 0x0D 0x01
Encoding : 0x01
BR_Nominal : 0x0D
Vendor Name : CISCO-FINISAR
Vendor Part Number : FTLF1319P2BCL-C4
Vendor Revision : 0x41 0x30 0x20 0x20
Vendor Serial Number : FNS171003CQ
-----------------------------------------------
Other Information
-------------------------------------------------------
Port asic num : 2
Port asic port num : 0
XCVR init completed : 1
Embedded PHY : not present
SFP presence index : 13
SFP iter cnt : 491988
SFP failed oper flag : 0x0
IIC error cnt : 0
IIC error dsb cnt : 0
IIC max sts cnt : 5
Chk for link status : 1
Link Status : 1
Link Status Media : 1
Preferred media : 0
Resolved Media : 1
Config Media : 1
Access Count : 0
Access Count Max : 2
Port Tx Fault : no
Port Tx Disable : no
. . . .
Show interface gi4/0/13:
GigabitEthernet4/0/13 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5057.a82b.e50d (bia 5057.a82b.e50d)
MTU 1500 bytes, BW 1000000 Kbit, 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 1000BaseLX SFP
input flow-control is off, output flow-control is unsupported
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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
28 packets input, 7021 bytes, 0 no buffer
Received 28 broadcasts (21 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 21 multicast, 0 pause input
0 input packets with dribble condition detected
253 packets output, 22222 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
Now, I remove the SFP from port 13 and plug it into port 12 instead.
*Mar 1 17:37:09.425: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/0/13, changed state to down
*Mar 1 17:37:10.432: %LINK-3-UPDOWN: Interface GigabitEthernet4/0/13, changed state to down
Note the absence of link changes on port 12.
Show interfaces status:
Gi4/0/12 notconnect 1 full 1000 1000BaseLX SFP
Gi4/0/13 notconnect 1 auto auto Not Present
GigabitEthernet4/0/12 (gpn: 174, port-number: 12)
-----------------------------------------------------------
General SFP Information
-----------------------------------------------
Identifier : 0x03
Connector : 0x07
Transceiver : 0x00 0x00 0x00 0x02 0x12 0x00 0x0D 0x01
Encoding : 0x01
BR_Nominal : 0x0D
Vendor Name : CISCO-FINISAR
Vendor Part Number : FTLF1319P2BCL-C4
Vendor Revision : 0x41 0x30 0x20 0x20
Vendor Serial Number : FNS171003CQ
-----------------------------------------------
Other Information
-------------------------------------------------------
Port asic num : 1
Port asic port num : 26
XCVR init completed : 1
Embedded PHY : not present
SFP presence index : 12
SFP iter cnt : 499832
SFP failed oper flag : 0x0
IIC error cnt : 0
IIC error dsb cnt : 0
IIC max sts cnt : 5
Chk for link status : 1
Link Status : 0
Link Status Media : 0
Preferred media : 0
Resolved Media : 1
Config Media : 1
Access Count : 0
Access Count Max : 2
Port Rx Loss : yes
Port Tx Fault : no
Port Tx Disable : no
. . . .
Show interface gi4/0/12:
GigabitEthernet4/0/12 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 5057.a82b.e50c (bia 5057.a82b.e50c)
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 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 1000BaseLX 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: 0/75/0/0 (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
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 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Does anyone have any ideas?
Regards,
Anders Fredriksson
