Pcg Components; Switching And Forwarding Module (Sfm); Figure 7: Packet Forwarding Engine Clock Generator; Table 6: States For Pcg Leds - Juniper Internet Router M160 Hardware Manual

PCG Components

Each PCG (shown in Figure 7) has the following components:

Figure 7: Packet Forwarding Engine Clock Generator

Offline button

Table 6: States for PCG LEDs

Label
MASTER
OK
FAIL

Switching and Forwarding Module (SFM)

The Switching and Forwarding Module (SFM) performs route lookup,
filtering, and switching on incoming data packets, then directs outbound
packets to the appropriate FPC for transmission to the network. It can
process 40 million packets per second (Mpps).
Up to four SFMs can be installed in the router, processing a total of 160 Mpps.
The SFMs are hot-pluggable, as described in Field-Replaceable Units (FRUs) on
page 4. Removing or inserting an SFM causes a brief interruption in forwarding
performance (about 500 ms) as the Packet Forwarding Engine reconfigures
the distribution of packets across the remaining SFMs.
For SFM replacement instructions, see "Replacing an SFM" on page 188.
Signal generator—Provides a 125-MHz system clock signal.
EEPROM—Stores the serial number and revision level of the PCG.
Three LEDs—Indicate PCG status. There is a blue one labeled
one labeled , and an amber one labeled
OK
Offline button—Prepares the PCG for removal from the router when pressed.
LEDs
Color State Description
PCG is master.
Blue On steadily
Green
On steadily PCG is functioning normally.
Blinking PCG is starting up.
Amber On steadily PCG has failed.
Hardware Component Overview
MASTER
. Table 6 describes the LED states.
FAIL
Packet Forwarding Engine
, a green
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