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TIM JUDGE
Beginner

SFP missing from Show Inventory command on stacked 3750X

Hi, we have a stack of 2 x WS-C3750X-48P switches with a 10 gigabit module in each: When I run a show inventory I can see everything except for the LRM SFP within the 10 gigabit module in the second stack member. See below:

#sh ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 15.2(3)E2, RELEASE SOFTWARE (fc1)

#sh switch service-modules
Switch/Stack supports service module CPU version: 03.07.02.WAL
                          Temperature                     CPU
Switch#  H/W Status       (CPU/FPGA)      CPU Link      Version
-----------------------------------------------------------------
 1       OK               58C/70C         connected     03.07.02.
 2       OK               69C/71C         connected     03.07.02.

#sh interfaces transceiver
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).

                                 Optical   Optical
           Temperature  Voltage  Tx Power  Rx Power
Port       (Celsius)    (Volts)  (dBm)     (dBm)
---------  -----------  -------  --------  --------
Te1/1/1      46.1       3.27      -2.9      -1.9
Te2/1/1      46.0       3.24      -2.1      -0.6

#sh interfaces transceiver properties | begin 2/1/1
Name : Te2/1/1
Administrative Speed: 10000
Administrative Duplex: full
Administrative Auto-MDIX: on
Administrative Power Inline: N/A
Operational Speed: 10000
Operational Duplex: full
Operational Auto-MDIX: off
Media Type: SFP-10GBase-LRM

#sh int status

~

~
Port      Name               Status       Vlan       Duplex  Speed Type
Te2/1/1   Trunk         connected    trunk        full    10G SFP-10GBase-LRM
Te2/1/2                      notconnect   1            full    10G Not Present

#sh inv
NAME: "1", DESCR: "WS-C3750X-48P"
PID: WS-C3750X-48PF-S  , VID: V02  , SN: FDO1610V1H8

NAME: "Switch 1 - Power Supply 1", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC  , VID: V02L , SN: LIT16012789

NAME: "Switch 1 - Power Supply 2", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC  , VID: V02L , SN: LIT16012775

NAME: "Switch 1 - FRULink Slot 1 - FRULink Module", DESCR: "FRULink 10G SM Module"
PID: C3KX-SM-10G       , VID: V01  , SN: FDO1548160F

NAME: "TenGigabitEthernet1/1/1", DESCR: "SFP-10GBase-LRM"
PID: SFP-10G-LRM         , VID: V02  , SN: AGD1607V09N

NAME: "2", DESCR: "WS-C3750X-48P"
PID: WS-C3750X-48PF-S  , VID: V02  , SN: FDO1610V1HB

NAME: "Switch 2 - Power Supply 1", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC  , VID: V02L , SN: LIT16012796

NAME: "Switch 2 - Power Supply 2", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC  , VID: V02L , SN: LIT16012780

NAME: "Switch 2 - FRULink Slot 1 - FRULink Module", DESCR: "FRULink 10G SM Module"
PID: C3KX-SM-10G       , VID: V01  , SN: FDO1548164Z

Where is the second LRM? The inventory command doesn't show it.

It is a Cisco LRM just like the one in slot TE 1/1/1 but it doesn't show up.

Appears to be a bug :)

6 REPLIES 6
nicolasccc
Enthusiast

Hello,

Have you tried to move the SFP-10G-LRM that is not recognize to another module (swap it with the working one).

This will tells you if the module might be faulty or if it is the SFP.

Have a good day.

Hi, this is a cosmetic error. The SFP is working and is actively a part of the etherchannel. I just can't see the SFP when I run a "show inventory". So, I believe it to be a cosmetic bug

Was it by chance hot inserted?  If so, I bet it will appear on the next switch reboot.

Hi, originally it was but the switches have been power reset on a number of occasions since.

Please note the SFP is working fine, we just can't see it in "show inventory" and thus we can't see the serial number for maintenance purposes.

Coco
Beginner

I know it's an old thread but maybe someone is still searching for the answer:

so : first enter "session 2" command to enter on the CLI of  switch 2 from stack , then  when in the CLI of switch 2 : "show inventory"

Hi friend, 

Try to check with the comman show inventory (raw|entity) these are more specific

raw       

(Optional) Retrieves information about all of the Cisco products—referred to as entities—installed in the Cisco networking device, even if the entities do not have a product ID (PID) value, a unique device identifier (UDI), or other physical identification.

entity   

(Optional) Name of a Cisco entity (for example, chassis, backplane, module, or slot). A quoted string may be used to display very specific UDI information; for example "sfslot 1" will display the UDI information for slot 1 of an entity named sfslot.

Hope solve the problem