Re: Cisco Catalyst 3750x series switch

sjarasan · ‎11-30-2020

Hi,

I have cisco catalyst 3750x 24 port switch series switch, and the switch has C3KX-NM-10G module.

Problem:

I have connected fibre optic in SFP+ transceiver on G2/TE1 (Uplink). After 7 to 8 hours, the SFP+ transceiver stops working (Lights off state). There is no data transmission. If I removed the SFP+ transceiver and reinserted, then the connection coming back to normal (Lights Blink). The data transmission starts again. This is happening daily.

Anybody has an idea about How to troubleshoot the switch.

marce1000 · ‎11-30-2020

- Check the logs when this happens, preferably use a syslog-server. for flexible logging monitoring

M.

-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !

Reza Sharifi · ‎11-30-2020

Hi,

Does show interface show any error messages? Also, try replacing the fiber patch cord connected to the optic, if that does not help, replace the SFP+.

HTH

sjarasan · ‎12-02-2020

Hi,

While Checking the logs I found this error.

Tx power low alarm and Rx power low alarm (Is this an SFP transceiver issue)

ASW-G-L09-001#show logging
Log Buffer (8192 bytes):
D_VIOLATION: Te1/1/1: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -11.3 dBm.
019031: May 18 12:27:34.016: %PLATFORM_ENV-1-FRU_PS_ACCESS: FRU Power Supply is not responding
019032: May 18 12:32:21.988: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1/1: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -11.3 dBm.
019071: May 18 14:48:36.536: %PLATFORM_ENV-1-FRU_PS_ACCESS: FRU Power Supply is not responding
019072: May 18 14:52:25.536: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1/1: Rx power low alarm; Operating value: -40.0 dBm, Threshold value: -13.9 dBm.
019073: May 18 14:52:25.536: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1/1: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -11.3 dBm.
019074: May 18 14:52:57.740: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/1, changed state to up
019075: May 18 14:52:59.770: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/1, changed state to up
019076: May 18 14:53:28.812: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up

paul driver · ‎11-30-2020

Hello
Try upgrading the IOS if the logs don’t show anything, We had the same issue not log back with a 3750x distribution stack , Nothing in logs to show the failing transceivers, Put it down to possible buggy ios, once we upgraded the stack all good haven’t had a fail since..

Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Leo Laohoo · ‎11-30-2020

Post the complete output to the following commands:

sh version
sh logs
sh interface <SFP PORT> controll

sjarasan · ‎12-01-2020

ASW-G-L09-001#show interfaces te1/1/1 transceiver detail
ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
High Alarm High Warn Low Warn Low Alarm
Temperature Threshold Threshold Threshold Threshold
Port (Celsius) (Celsius) (Celsius) (Celsius) (Celsius)
--------- ------------------ ---------- --------- --------- ---------
Te1/1/1 29.4 75.0 70.0 0.0 -5.0

High Alarm High Warn Low Warn Low Alarm
Voltage Threshold Threshold Threshold Threshold
Port (Volts) (Volts) (Volts) (Volts) (Volts)
--------- --------------- ---------- --------- --------- ---------
Te1/1/1 3.30 3.63 3.46 3.13 2.97

Optical High Alarm High Warn Low Warn Low Alarm
Transmit Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
--------- ----------------- ---------- --------- --------- ---------
Te1/1/1 -2.2 1.7 -1.3 -7.3 -11.3

Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
------- ----------------- ---------- --------- --------- ---------
Te1/1/1 -3.7 2.0 -1.0 -9.9 -13.9

ASW-G-L09-001#show interface te1/1/1 controller
TenGigabitEthernet1/1/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is b0aa.7720.729d (bia b0aa.7720.729d)
Description: Uplink to "CSW-G-L1-001"
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, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:02, 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 279000 bits/sec, 447 packets/sec
5 minute output rate 16000 bits/sec, 8 packets/sec
615261604 packets input, 48064745243 bytes, 0 no buffer
Received 599420455 broadcasts (525487445 multicasts)
0 runts, 0 giants, 0 throttles
5 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 525487445 multicast, 0 pause input
0 input packets with dribble condition detected
15469576 packets output, 3101889460 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

sjarasan · ‎12-01-2020

ASW-G-L09-001#show version
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9NPE-M), Version 15.2(2)E, RELEASE SOFTWARE (fc3)
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : B0:AA:77:20:72:80
Motherboard assembly number : 73-12551-12
Motherboard serial number : FDO19090XL4
Model revision number : A0
Motherboard revision number : A0
Model number : WS-C3750X-24P-E
Daughterboard assembly number : 800-32727-03
Daughterboard serial number : FDO1909092D
System serial number : FDO1909P0PG
Top Assembly Part Number : 800-31325-09
Top Assembly Revision Number : F0
Version ID : V06
CLEI Code Number : CMMPP00DRA
Hardware Board Revision Number : 0x05

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 30 WS-C3750X-24P 15.2(2)E C3750E-UNIVERSALK9N

ASW-G-L09-001#show interface te1/1/1 controller
TenGigabitEthernet1/1/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is b0aa.7720.729d (bia b0aa.7720.729d)
Description: Uplink to "CSW-G-L1-001"
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, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:02, 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 279000 bits/sec, 447 packets/sec
5 minute output rate 16000 bits/sec, 8 packets/sec
615261604 packets input, 48064745243 bytes, 0 no buffer
Received 599420455 broadcasts (525487445 multicasts)
0 runts, 0 giants, 0 throttles
5 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 525487445 multicast, 0 pause input
0 input packets with dribble condition detected
15469576 packets output, 3101889460 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

sjarasan · ‎12-01-2020

Ok

sjarasan · ‎12-01-2020

Is this an SFP transceiver issue

019072: May 18 14:52:25.536: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1/1: Rx power low alarm; Operating value: -40.0 dBm, Threshold value: -13.9 dBm.
019073: May 18 14:52:25.536: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1/1: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -11.3 dBm.

Leo Laohoo · ‎12-01-2020

I want to see the same output taken from the other switch.

NOTE: I'd seriously consider upgrading the firmware of the switch. 15.2(2)E is not a "stable" release.

johnlloyd_13 · ‎12-01-2020

hi,

can you post the show inventory?

try to do: move to a spare port on the module card, swap SFP or clean the SFP with a foam swab/bud.

sjarasan · ‎12-02-2020

ASW-G-L09-001# show inventory
NAME: "1", DESCR: "WS-C3750X-24P"
PID: WS-C3750X-24P-E , VID: V06 , SN: FDO1909P0PG

NAME: "Switch 1 - Power Supply 2", DESCR: "FRU Power Supply"
PID: C3KX-PWR-715WAC , VID: V02D , SN: DCB1903A0DN

NAME: "Switch 1 - FRULink Slot 1 - FRULink Module", DESCR: "FRULink 10G ST Module"
PID: C3KX-NM-10G , VID: V01 , SN: FDO19090PVW

NAME: "TenGigabitEthernet1/1/2", DESCR: "SFP-10GBase-SR"
PID: SFP-10G-SR , VID: V03 , SN: JUR190601NE