M320 Switch Interface Board (Sib) Overview; M320 Sib Description; Figure 9: Sib-M; Table 4: Sib Leds - Juniper M320 Hardware Manual

M320 Router Hardware Guide

M320 Switch Interface Board (SIB) Overview

M320 SIB Description

16
M320 SIB Description on page 16
M320 Performance for Different SIB Configurations on page 17
The Switch Interface Boards (SIBs) provide the switching function to the destination
FPC. The SIBs (see Figure 9 on page 16) create the switch fabric for the router, providing
up to a total of 385 million packets per second (Mpps) of forwarding with the maximum
configuration.
SIBs are located at the center rear of the router chassis in the slots labeled
SIB3 (top to bottom). The M320 router can be configured with two, three, or four SIBs.
You can upgrade from two to three SIBs or from three to four SIBs without resetting or
stopping Packet Forwarding Engines.
Each FPC has a dedicated ASIC with up to four high-speed links that connect to the SIBs
(one link per SIB).
SIBs are hot-insertable and hot-removable.

Figure 9: SIB-M

Each SIB consists of the following components:
Switch Fabric ASICs.
High-speed links (HSLs) to each FPC.
Three LEDs located on the SIB faceplate that display the status of the SIB. Table 4 on
page 16 describes the functions of the SIB LEDs. If all three LEDs are off, the SIB is not
receiving power. The
OK
SIB online/offline button, located on the SIB faceplate.

Table 4: SIB LEDs

Label Color
Green
ACTIVE
and LEDs are replicated on the craft interface.
FAIL
State Description
On steadily SIB is in active mode.
through
SIB0
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