This article provides information on how to clear the pme 2 : Link Down and pme 3 : Link Down alarms on QFX3000-G.

• On the CB board of QF/IC on the QFX3000-G system, there are 4 PME ports and CB of QF/IC uses 2 ports ( pme0 and pme1 ) for each CPE switch device. But in a specific case, the chassis alarm reports that the pme 2 and pme 3 links are down:
  

  TEST-IC1:
  -----------------------------------------------------------
  4 alarms currently active
  Alarm time Class Description
  2012-09-16 12:31:53 PDT Major CB 1 pme 3 : Link Down
  2012-09-16 12:31:52 PDT Major CB 1 pme 2 : Link Down
  2012-09-16 12:31:46 PDT Major CB 0 pme 3 : Link Down
  2012-09-16 12:31:46 PDT Major CB 0 pme 2 : Link Down
  
  TEST-IC0:
  -----------------------------------------------------------
  4 alarms currently active
  Alarm time Class Description
  2012-09-16 12:32:08 PDT Major CB 1 pme 3 : Link Down
  2012-09-16 12:32:08 PDT Major CB 1 pme 2 : Link Down
  2012-09-16 12:31:16 PDT Major CB 0 pme 3 : Link Down
  2012-09-16 12:31:16 PDT Major CB 0 pme 2 : Link Down

• Actually, ports 2 and 3 are not used; but the chassis alarm is active for them and the LED is Red.

• Currently, the use of these ports for the CPE connection in the CPE connection instruction is not supported.
• If RJ45 SFPs are inserted into the CB's pme2-3 slots, these alarms are raised.

This issue can be resolved by removing the above mentioned SFPs.