Replacing A T640 Sib; Figure 161: Installing An Scg - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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Replacing a T640 SIB

280

Figure 161: Installing an SCG

T640 SONET Clock Generators (SCGs) Description on page 48
T640 SONET Clock Generators (SCGs) LEDs on page 50
Maintaining the T640 SCGs on page 185
Five SIBs are installed in the T640 router. The SIBs are located in the rear of the chassis
in the slots marked through
SIB0
SIBs are hot-insertable and hot-removable.
NOTE: SIB version B is supported in Junos OS Release 7.3 and later. You can
use a SIB or SIB version B in a chassis running Junos 7.3 or later, but you cannot
use both on the same chassis at the same time.
If you use one or more FPC4s or Enhanced Scaling FPCs in a T640 router that
is not part of a routing matrix, each SIB in the router must be a SIB version B.
NOTE: The T640-SIB requires Junos OS Release 7.0 or later.
To replace a SIB, perform the following procedures:
Removing a T640 Standard SIB or Standard SIB Version B on page 281
1.
2. Installing a T640 Standard SIB or Standard SIB Version B on page 282
Upgrading to a T640 Standard SIB Version B on page 283
3.
Removing a T640-SIB on page 284
4.
Installing a T640-SIB on page 286
5.
. Each SIB weighs approximately 6.8 lb (3.1 kg).
SIB4
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