Replacing A T320 Standard Control Board Or T-Cb; Removing A T320 Standard Control Board Or T-Cb - Juniper Core Router T Series Hardware Manual

T320 Core Router Hardware Guide
See Also

Replacing a T320 Standard Control Board or T-CB

208
user@host> show chassis environment cb
T320 Host Subsystem Description on page 29
Maintaining the T320 Host Subsystem on page 275
The router can have up to two control boards. They are located in the upper rear of the
chassis in the slots marked
To replace a standard control board or T-CB, perform the following procedures:
Removing a T320 Standard Control Board or T-CB on page 208
1.
Installing a T320 Standard Control Board or T-CB on page 209
2.

Removing a T320 Standard Control Board or T-CB

CAUTION: Before you replace a control board, you must take the host
subsystem offline. If there is only one host subsystem, taking the host
subsystem offline shuts down the router. See
Subsystem Offline" on page
CAUTION: If the control board to be replaced is associated with the Routing
Engine currently functioning as the master Routing engine, switch it to the
backup before removing the T-CB. See
Offline" on page
To remove a standard control board or T-CB (see
Take the host subsystem offline. See
1.
page 205.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
3.
the strap to one of the ESD points on the chassis. .
Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector
4.
handles on both sides of the control board faceplate.
Flip the ejector handles outward to unseat the control board.
5.
Grasp the ejector handles and slide the control board about halfway out of the chassis.
6.
and . Each weighs approximately 5 lb (2.3 kg).
CB0 CB1
205.
"Taking the T320 Host Subsystem
205.
Figure 83 on page
"Taking the T320 Host Subsystem Offline" on
"Taking the T320 Host
209):
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