JUNOS Internet Software Network Operations Guide: Hardware
616 ! Replacing the SSB
Replacing the SSB
Purpose The SSB is hot-pluggable. When the SSB is removed, all packet forwarding stops
immediately and the Routing Engine responds by sending alarms through the
Ethernet channel to the management console. When the SSB is replaced, it is
rebooted by flash EEPROM.
Action To replace a failed SSB, follow these steps:
1. Attach an 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.
12. Verify that the SSB works by using the
show chassis ssb CLI command. (See
“Display the Redundant SSB Detailed Status” on page 610.)
CAUTION: If you take the SSB offline, packet forwarding will be affected.
NOTE: To seat the SSB properly, be sure to tighten the screws adequately. If the SSB
is not seated properly, it will not function
.
To Next Page
Loading...
Need help?
General
