Monitoring, Management & Location Tracking

Cisco terminal server showing up following error messages when connected to the Aruba AP “Excessive modem signal transitions detected on line 72”.

Aruba Employee
What could cause the Cisco terminal server showing up following error messages when connected to the Aruba AP “Excessive modem signal transitions detected on line 72”?

 

Terminal server : Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)
 
 
CISCO terminal server connected to Aruba APs could trigger below errors on the Terminal servers and how we could fix it. 
 
Jul 26 11:51:39 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 12:10:49 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 12:29:59 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 12:49:09 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 13:08:19 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 13:27:28 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72
Jul 26 13:46:38 utc: %HWIC_SERIAL-3-LINEFLAP: Excessive modem signal transitions detected on line 72

 
Solution:
 
All the flow control should be closed default for Aruba AP; once we shutdown the flow controller on the terminal server the error messages should go away as we don't support it.

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Last update:
‎06-29-2014 02:11 PM
Updated by:
 
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