Juniper MX10004 - Page 191

SIB 3 through SIB 5 are located behind the right fan tray. You must remove the appropriate fan tray to
access the failing SFB. See "Remove an MX10004 Fan Tray" on page 166.
If you plan to replace one or more Switch Fabric Boards (SFBs), make sure you calculate the me
required to remove the fan tray, add or replace the SFBs, and install the fan tray in the chassis. To
calculate the me allowed for replacing a SFB, see Table 52 on page 175.
Ensure that you have the following equipment on hand before replacing a SFB:
• Electrostac bag or anstac mat
• Electrostac discharge (ESD) grounding strap
• Phillips (+) number 2 screwdriver (oponal)
• Replacement SFB or SFB cover (JNP10K-SF-BLNK) for the empty slot
CAUTION: Do not remove the SFB unless you have a replacement SFB or a SFB cover
(JNP10004-SF-BLNK) available.
NOTE: If you are not installing another SFB into the empty card slot within a short me, install
the SFB cover into the slot to maintain proper airow in the card cage.
NOTE: When replacing the fans or SFBs at 40° C chassis ambient temperature, ensure that the
fans run at 100% fan speed for at least 10 minutes before replacing the fans or SFBs. Use the
test chassis fan tray 0 speed
full-speed and test chassis fan tray 1 speed full-speed commands to set
the chassis fans to 100% speed.
Aer replacing the fans or SFBs, set the fans to normal speed using the test chassis fan tray 0
speed normal and test chassis fan tray 1 speed normal command.
To remove an MX10004 Switch Fabric Board:
1. Take the SFB oine using the request chassis sfb slot
slot-number offline command.
NOTE: If you suspect the SFB is faulty and want to ensure that packets do not ow through
the SFB, power o the SFB instead of taking the SFB oine. To power down the SFB, use the
set chassis sfb slot-number offline command. Before you bring a new SFB in that slot online,
you must delete the old conguraon using the delete chassis sfb slot
slot-number offline
command.
181