Wednesday, December 1, 2010

Cisco Switch POST Results

I recently discovered a new switch command. If you are working on a Cisco switch and you suspect any hardware errors and problems you can run this command:

"show post"

This command will show you the results of the POST when the switch was turned on.

!!NOTE!!
I don't think this command works on all Cisco switches, but I don't have a list for you. The example output is from a 2960S switch.


*****EXAMPLE OUTPUT*****

Switch 2
---------

POST: MA BIST : Begin
  FC 1   MBIST Test Passed.
  DP Sg1 MBIST Test Passed.
  DP Xg1 MBIST Test Passed.
  NI 1   MBIST Test Passed.
  FC 0   MBIST Test Passed.
  DP Sg0 MBIST Test Passed.
  DP Xg0 MBIST Test Passed.
  NI 0   MBIST Test Passed.
  UPB    MBIST Test Passed.
POST: MA BIST : End, Status Passed

POST: TCAM BIST : Begin
POST: TCAM BIST : End, Status Passed

POST: Inline Power Controller Tests : Begin
POST: Inline Power Controller Tests : End, Status Passed

POST: Thermal, Fan Tests : Begin
POST: Thermal, Fan Tests : End, Status Passed

POST: PortASIC Stack Port Loopback Tests : Begin
POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed

POST: EMAC Loopback Tests : Begin
POST: EMAC Loopback Tests : End, Status Passed

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