no 'ip routing' on a 3550 EMI image?

From: SPRONK, JEFF, ATTCORP (js1055@att.com)
Date: Fri Dec 28 2007 - 14:18:39 ART

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I've run into this a few times, but have never been able to explain it.
I've got (4) 3550s in my lab that are all running the same EMI
image(c3550-i5q3l2-mz.121-19.EA1c.bin). Every so often I find that I'm
not able to use the "ip routing" command---it's simply not there:

Rack1SW1(config)#ip rout
Rack1SW1(config)#ip rout
                     ^
% Invalid input detected at '^' marker.

Rack1SW1(config)#ip routing
                     ^
% Invalid input detected at '^' marker.

Rack1SW1(config)#ip
Rack1SW1(config)#ip ?
<!-----OUTPUT OMMITED-----!>
  pim PIM global commands
  prefix-list Build a prefix list
  radius RADIUS configuration commands
  rcmd Rcmd commands
  reflexive-list Reflexive access list
  sap Global IP Multicast SAP Commands
  sdr Global IP Multicast SDR Commands
<!-----OUTPUT OMMITED-----!>
Rack1SW1(config)#ip

The only solution to this is to delete the following files from flash,
and reload the switch:

flash:env_vars
flash:system_env_vars

When the switch comes back up, I'm then able to use the "ip routing"
command(among others...).

Is this expected behavior?

Jeff Spronk
at&t // ERSC

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