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Cisco Bug: CSCtc99666 - Serial console on WAE-73xx and WAE-674 get disabled

Last Modified

Feb 22, 2014

Products (1)

  • Cisco Wide Area Application Services (WAAS) Appliances

Known Affected Releases

4.0(13) 4.1(3) 4.1(5)

Description (partial)


There is no output on the serial console at all.

When checking the BIOS settings you will see that the serial console is disabled.

This sometimes happens after a  WAE-674-K9 WAE-7326-K9 WAE-7341-K9 WAE-73271-K9 gets reloaded or arrives as new. 
There are some scenarios that could cause the serial console to be disabled. Serial port getting disabled is a know issue with the vendor BIOS and this issue is seen on the WAE 674, WAE 7341, WAE 7371 platforms only.

Causes include and are not limited to:

1 interrupting the bootup in the BIOS 3 times consecutively. The BIOS will then load 
  'good defaults' which disable the serial port.

  This BIOS will display the message "Three consecutive boot failures.  Applying 
  CMOS default settings"

2 if there is a too long delay in initialization of some hardware components (like the 
  RAID card) the BIOS will timeo out and produce an error, also going to 'safe defaults'

3 Somebody modifying the BIOS by mistake
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