[c-nsp] Monitoring the Optical status on Cisco SFP

[Simon Leinen]

Mikael Abrahamsson writes:
> On Sat, 30 Apr 2005, Raj Panchal wrote:
>> Does any one knows how to monitor the optical status on Gigabit optical 
>> SFP being used for cisco 3750, Cisco 7606 and cisco 2950. I would like 
>> to know of Cisco IOS has any such command
>> 
>> If you possible please send me the output of the command

> show interface transciever

> Only supported on special kind of SFP and Xenpaks though, and only in very 
> recent IOS. Cisco calls this "DOM" for Digital Optical Monitoring.

> For the 7600 this is in in 12.2.18SXE and later.

Thanks for the pointer... that's an interesting feature (and I thought
I had read the 12.2(18)SXE release notes thoroughly :-).  Here's some
sample output from a router with transceivers that support DOM, namely
10GE (LR) XENPAKs and a few CWDM/DWDM GBICs:

    foobar>show 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  Current   Tx Power  Rx Power
    Port     (Celsius)    (Volts)  (mA)      (dBm)     (dBm)
    -------  -----------  -------  --------  --------  --------
    Te1/3      34.3       0.00      18.6      -3.6      -6.4   
    Te1/4      30.7       0.00      17.7      -2.7      -5.8   
    Gi2/13     43.6       3.30      42.5       2.9      -6.2   
    Gi2/16     41.0       4.89      32.6       1.1 --   -8.8   
    Te5/1      28.6       0.00       0.0     N/A     -40.0   

Te5/1 is administratively down, which obviously means that the laser
is off (good).

The sensors can be read over SNMP through CISCO-ENTITY-SENSOR-MIB.
-- 
Simon.