JUNOS Internet Software Network Operations Guide: Hardware
412 ! Verifying SSB Failure
Step 2: Perform a Swap Test on the SSB
Action To perform a swap test on an SSB, follow these steps:
1. Attach an electrostatic discharge (ESD) wrist strap to your bare wrist, and
connect the wrist strap to one of the two ESD points on the chassis.
2. Locate the SSB offline switch on the front panel and press and hold the switch
for 5 seconds to take the SSB offline.
3. Unscrew the thumbscrews on the left and right sides of the card carrier to
unseat the SSB from the midplane.
4. Flip the ends of the two extractor clips, which are adjacent to the thumbscrews,
towards the outside edges of the router.
5. Grasp both sides of the card carrier and slide the SSB about three-quarters of
the way out of the router.
6. Move one of your hands underneath the SSB to support it, and slide it
completely out of the chassis.
7. Replace the SSB with one that you know works.
8. 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.
9. Slide the SSB card carrier all the way into the card cage until it contacts the
midplane.
10. Flip the extractor clips, located on the left and right sides of the card carrier,
towards each other to secure the SSB in place.
11. Tighten the thumbscrews on the left and right sides of the card carrier to seat
the SSB.
CAUTION: Before performing a swap test, always check for bent pins in the
midplane and check the SSB for stuck pins in the connector. Pins stuck in the
component connector can damage other good slots during a swap test.
CAUTION: If you take the SSB offline, packet forwarding will be affected.
NOTE: To seat the SSB properly, be sure to tighten the screws securely. If the SSB is
not seated properly, it will not function
.
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