Use the version and show chassis flash command
Example :
css1# version
Version: ap0410017s (4.10 Build 17) This line shows the
actual IOS running
Flash (Locked): 5.00 Build 2 This line shows the code running the
SCM and SFM that are
saved in memory
Flash (Operational): 5.00 Build 2 This line shows the code for the SCM
and SFM running
Type: PRIMARY This line shows that this box is the
primary if a backup is used you would
see it as secondary
Licensed Cmd Set(s): Standard Feature Set This shows what features are
available with the
Enhanced Feature Set IOS running
__This command shows everything in flash including the code running the SFM
and SCM modules.
css1# show chassis flash
Configuration for CS50:
Name: CS50 SW Version: 4.10 Build 17 This line
shows the actual
IOS running
HW Major Version: 03 HW Minor Version: 0
Serial Number: 21480066695 This line shows the serial number of
the chassis
Base Mac Address: 00-10-58-03-78-94 This line shows the MAC of the
CSS11050
This shows code running This shows the code saved
the SCM and the SFM for the SCM and the SFM
Operational Locked
_5.00 Build 2 5.00 Build 2
The SFM (Switch Fabric module) runs TCP , Spoofing, Load Balancing
The SCM (System Control Module) runs Routing, Management, Data collection,
ARP and other functions related to network layer functions
The code running on these modules cannot be changed unless you change out
the modules themselves. Not upgradeable like the IOS.
