Understanding The Sfms - Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Network Operation Manual

JUNOS Internet Software Network Operations Guide: Hardware
Monitor SFM Tasks
2. Locate the SFM Serial Number ID Label on page 357
Replacing the SFM on page 358

Understanding the SFMs

Purpose
What Is an SFM
Figure 145: M40e and M160 Router SFM Location
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Understanding the SFMs
Inspect the SFMs to ensure that all traffic leaving the Flexible PIC Concentrators
(FPCs) is handled properly.
The SFM is a control board that handles traffic transiting the router (see Figure 144).
There are two SFMs on the M40e router and four SFMs on the M160 router (see
Figure 145).
Figure 144: SFM Component
Offline button
LEDs
The SFMs provide route lookup, filtering, and switching. When the serial stream of
bits leaves the FPC, it is directed to one of the SFMs. Each SFM effectively handles
one-half or one-quarter of the traffic on each FPC. The SFMs handle a total of 160
million packets per second (Mpps) of forwarding.
M40e router rear
SF M 0
SFMs
SF M 1
M C S 0
R E 0
R E 1
M C S 1
Command or Action
Look on the top left of the SFM component.
See "Return the Failed Component" on page 86, or follow the
procedure in the appropriate router hardware guide.
M160 router rear
SF M 0
SFMs
SF M 1
M C S 0
R E 0
PC G 0
R E 1
PC G 1
M C S 1
SF M 2
SFMs
SF M 3
PC G 0
PC G 1