Switch Fabric Components And Descriptions; T320 Switch Interface Boards (Sibs) Description; Figure 31: T320 Sib - Juniper Core Router T Series Hardware Manual

CHAPTER 8
Switch Fabric Components and
Descriptions

T320 Switch Interface Boards (SIBs) Description

Copyright © 2018, Juniper Networks, Inc.
T320 Switch Interface Boards (SIBs) Description on page 85
T320 SIB LEDs on page 86
The Switch Interface Boards (SIBs) provide the switching function to the destination
FPC (see Figure 31 on page
up to a total of 385 million packets per second (Mpps) of forwarding.
Three SIBs are installed in the T320 router. The SIBs are located at the center rear of the
chassis in the slots labeled
acts as a backup to
SIB0 SIB1
becomes active. A slight degradation in performance might occur. When the SIB in
SIB0
slots or is replaced or reinstalled, it will become active again and
SIB1 SIB2
to backup. The router will regain full forwarding capacity.
SIBs are hot-insertable and hot-removable.

Figure 31: T320 SIB

Each SIB consists of the following components:
Switch Fabric ASICs.
High-speed links (HSLs) to each FPC.
85). The SIBs create the switch fabric for the router, providing
SIB0 through SIB2 (top to bottom).
and . If a SIB in slots
SIB2
or fails or is removed,
SIB1 SIB2
reverts
SIB0
85