Not receiving module removal alarms in Spectrum for Ca29xxStack devices

Products

• CA Spectrum

Issue/Introduction

After modeling a Cat29xxStack device in Spectrum, when a module is removed from the stack, Spectrum is not asserting a module removed alarm on the model as expected.

If the model is reconfigured, Spectrum then asserts the module removed alarm.

Cause

Possible root cause is the device is not updating the ifStackStackLastChange and ifTableLastChange attributes on the device when the module is removed.

ifStackLastChange OBJECT-TYPE
 SYNTAX TimeTicks (0 .. 4294967295)
 ACCESS read-only
 STATUS current

 DESCRIPTION
 "The value of sysUpTime at the time of the last change of
            the (whole) interface stack.  A change of the interface
            stack is defined to be any creation, deletion, or change in
            value of any instance of ifStackStatus.  If the interface
            stack has been unchanged since the last re-initialization of
            the local network management subsystem, then this object
            contains a zero value."
  ::= { ifMIBObjects 6 }

-- 1.3.6.1.2.1.31.1.6

 

ifTableLastChange OBJECT-TYPE
 SYNTAX TimeTicks (0 .. 4294967295)
 ACCESS read-only
 STATUS current

 DESCRIPTION
 "The value of sysUpTime at the time of the last creation or
            deletion of an entry in the ifTable.  If the number of
            entries has been unchanged since the last re-initialization
            of the local network management subsystem, then this object
            contains a zero value."
  ::= { ifMIBObjects 5 }

-- 1.3.6.1.2.1.31.1.5

Environment

Release : Any

Component : Spectrum Chassis Manager

Resolution

Spectrum monitors the ifStackStackLastChange and ifTableLastChange attributes on the device to determine of a module has been pulled.

Verify if the ifStackStackLastChange and ifTableLastChange attributes on the device change after pulling the module. If not, please contact the vendor to determine why these attribute values are not changed when a module has been pulled.