Did you ever wanted to find out inventory details of the SFP plugged into WLC ports ? Typically “show inventory” is what we need. But in AireOS, that command only give the Chassis serial Number as shown below.

(5508-1) >show inventory 
Burned-in MAC Address............................ 64:00:F1:F5:B0:80
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
Maximum number of APs supported.................. 250
NAME: "Chassis"    , DESCR: "Cisco 5500 Series Wireless LAN Controller"
PID: AIR-CT5508-K9,  VID: V02,  SN: FCW1519L0B1

This CSC forum thread give a very useful CLI command (debug fastpath cfgtool –dump.sfp)  you can run on AireOS WLC to get that information.

Here is a sample output

(5508-WC01) >debug fastpath cfgtool --dump.sfp
(5508-WC01) >FP0.
Port SFP Vendor       Transceiver Type    OUI PartNumber       Rev  SerialNumber     DateCode Auth
   1 CISCO-OEM        (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ120607419      120607   ok      
   2 CISCO-OEM        (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ120607423      120607   ok      
   3 CISCO-OEM        (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ120607425      120607   ok      
   4 CISCO-OEM        (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ120607424      120607   ok      
   5 CISCO-EQUIV      (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ121008094      121008   ok      
   6 CISCO-EQUIV      (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ121008093      121008   ok      
   7 CISCO-EQUIV      (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ121008095      121008   ok      
   8 CISCO-EQUIV      (0x02)1000BaseLX        GLC-LH-SM-CRB    2.0  ZZ121008096      121008   ok      
FP0.

Here is another example

(5508-WC02) >debug fastpath cfgtool --dump.sfp
(5508-WC02) >FP0.
Port SFP Vendor       Transceiver Type    OUI PartNumber       Rev  SerialNumber     DateCode Auth
   1 CISCO-FINISAR    (0x02)1000BaseLX        FTLF1318P2BCL-C3 A    FNS15400WH6      110927   ok      
   2 CISCO-FINISAR    (0x02)1000BaseLX        FTLF1318P2BCL-C3 A    FNS15400PCE      110926   ok      
   3 CISCO-FINISAR    (0x02)1000BaseLX        FTLF1318P2BCL-C3 A    FNS15400B2U      110925   ok      
   4 CISCO-FINISAR    (0x02)1000BaseLX        FTLF1318P2BCL-C3 A    FNS15400QRR      110926   ok      
   5 CISCO-FINISAR    (0x02)1000BaseLX        S210             11.0 S21010121511     101215   ok      
   6 CISCO-FINISAR    (0x02)1000BaseLX        S210             11.0 S21010121576     101215   ok      
   7 CISCO-FINISAR    (0x02)1000BaseLX        S210             11.0 S21010121580     101215   ok      
   8 CISCO-FINISAR    (0x02)1000BaseLX        S210             11.0 S21010121571     101215   ok      
FP0.

It is a good idea to disable those debug commands using “debug disable-all” CLI command once you get the output. Always be careful when issue debug commands on production setup, as certain debug command could introduce a performance hit.

Just to make it complete, if it is any IOS WLC platform you can run “show inventory raw” command you can get that information. Here is an example form a 5760.

5760-1#show inventory raw | in SFP-
NAME: "TenGigabitEthernet1/0/3", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V02  , SN: ONT151702VS    
NAME: "TenGigabitEthernet1/0/4", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V02  , SN: ONT151702VE    
NAME: "TenGigabitEthernet1/0/5", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V02  , SN: FNS16150BWF    
NAME: "TenGigabitEthernet1/0/6", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V02  , SN: FNS170701E6

Here is similar output from 3850

3850-1#show inventory raw | in SFP-
NAME: "TenGigabitEthernet1/1/3", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V01  , SN: SLK02742740BH  
NAME: "TenGigabitEthernet2/1/3", DESCR: "SFP-10GBase-LR"
PID: SFP-10G-LR         , VID: V02  , SN: FNS17420M9K 

This may be a useful command to remember if anyone asked this info from you.