I think it's also heavily dependant on the hardware as well.  My 3640
running 12.0(6) only returns the hardware info on the modules installed
(including those modules' serial numbers).  Most low-end routers don't give
this info.  Fortunately, most switches do (nice for fast inventory).

--
Jason Roysdon, CCNP/CCDP, MCSE, CNA, Network+, A+
List email: [EMAIL PROTECTED]
Homepage: http://jason.artoo.net/
Cisco resources: http://r2cisco.artoo.net/


""Joel Studtmann"" <[EMAIL PROTECTED]> wrote in message
93t4q0$6ao$[EMAIL PROTECTED]">news:93t4q0$6ao$[EMAIL PROTECTED]...
> Jake:
>
>
> show diag gives some serial numbers, but it's not supported under all
IOS's
> (11.3 and higher, maybe?).
>
> Here's some sample output from a 3660 (Running 12.0(something))
>
> xxxxxxx3660-1#show diag
>
> 3660 Chassis type: ENTERPRISE
>
> c3600 Backplane EEPROM:
>         Hardware Revision        : 1.0
>         Part Number              : 800-04740-02
>         Board Revision           : C0
>         Deviation Number         : 0-0
>         Fab Version              : 02
>         PCB Serial Number        : HAD042110PH
>         RMA Test History         : 00
>         RMA Number               : 0-0-0-0
>         RMA History              : 00
>         Chassis Serial Number    : JAB04238694
>         Chassis MAC Address      : 0002.4b7c.f590
>         MAC Address block size   : 112
>         Manufacturing Test Data  : 00 00 00 00 00 00 00 00
>         Fab Part Number          : 28-2651-02
>         Number of Slots          : 6
>         EEPROM format version 4
>
> <<snip>>
>
> It also shows serial numbers for the modules present.  (Not shown for
> brevity).
>
> Joel Studtmann
>
>
>
>
> ""Jake"" <[EMAIL PROTECTED]> wrote in message
> 93nmb0$1j3$[EMAIL PROTECTED]">news:93nmb0$1j3$[EMAIL PROTECTED]...
> > Hi all,
> >
> > 'show version' on a switch (2900 or 3500) will show the switch's serial
> > number (second to last line - right before the config-register).  Is
there
> a
> > similar way to find the serial number of a router?  I can't find it in
the
> > 'sh ver' output.
> >
> > Thanks,
> >
> > Jake
> >
> >
> > _________________________________
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>
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