Juniper M Series Monitoring And Troubleshooting Manual page 769

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Check the SSB Connection

Perform a Swap Test on the SSB

To verify SSB failure by checking the SSB connection.

If the SSB is not seated properly, it will not function.

To check the SSB connection, make sure that the SSB is properly seated in the slot. To

seat the SSB properly adequately, tighten the screws on the left and right sides of the

card carrier.

To verify SSB failure by performing a swap test on the SSB.

Before performing a swap test, always check for bent pins in the

midplane and check the SCB for stuck pins in the connector. Pins stuck in the

component connector can damage other good slots during a swap test.

To perform a swap test on the SSB:

Attach an electrostatic discharge (ESD) strap to your bare wrist, and connect the

strap to one of the two ESD points on the chassis.

Locate the SSB offline switch on the front panel and press and hold the switch for 5

seconds to take the SSB offline.

If you take the SSB offline, packet forwarding will be affected.

Unscrew the thumbscrews on the left and right sides of the card carrier to unseat the

SSB from the midplane.

Flip the ends of the two extractor clips, which are adjacent to the thumbscrews,

towards the outside edges of the router.

Grasp both sides of the card carrier and slide the SSB about three-quarters of the way

out of the router.

Move one of your hands underneath the SSB to support it, and slide it completely out

of the chassis.

Replace the SSB with one that you know works.

Grasp the front of the SSB card carrier with both hands and align the back of the card

carrier with the slide guides on the chassis.

Slide the SSB card carrier all the way into the card cage until it contacts the midplane.

Chapter 38: Monitoring Redundant SSBs