ACE 4710 SNMP false linkup/down trap notification?

Question

We have two ACE4710 in a failover configuration with Software version A4(2.0). SNMP is setup and the receiver is able to receive SNMP traps.
The issue is we are receiving a linkDown trap notification at least once every other day, followed shortly by a linkUp notification a minute later. We have checked all layer 2 devices connected to the ACE and cannot see any evidence that any link actually disconnected. We experienced no traffic lost, but this could be because a couple of the ACE links are bundled. The trap notification does not actually indicate which interface changed status. All links are Gigabits, and there are no packet drops either on the ACE or the layer 2 switch. What could be causing this?
Thanks in advance.

Answer 1

Hi Matthew, apologies for the late reply, and thanks for getting back to me. Please find below the output on our SNMP receiver today. As you will see from the log timestamp the linkdown and linkup occurred within a minute which is typical. We get this issue at least once every other day!
Notification Type: PROBLEM
Service: Link
Host: ldmzbmh001
Address: x.x.x.x
State: CRITICAL
Date/Time: Thu Feb 21 11:18:35 GMT 2013
Additional Info:
A linkDown trap signifies that the SNMP entity, acting in 16777312 up down
Notification Type: PROBLEM
Service: Link
Host: ldmzbmh001
Address: x.x.x.x
State: CRITICAL
Date/Time: Thu Feb 21 11:18:35 GMT 2013
Additional Info:
A linkDown trap signifies that the SNMP entity, acting in 65540 up down
Notification Type: RECOVERY
Service: Link
Host: ldmzbmh001
Address: x.x.x.x
State: OK
Date/Time: Thu Feb 21 11:19:05 GMT 2013
Additional Info:
A linkUp trap signifies that the SNMP entity, acting in an 16777312 up up
Regards,
Sam