Replacing An Sfm In An M40E Router; Removing An Sfm In An M40E Router - Juniper M40E Hardware Manual

M40e Multiservice Edge Router Hardware Guide

Replacing an SFM in an M40e Router

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One or two SFMs can be installed into the midplane from the rear of the chassis, as shown
in "M40e Chassis Description" on page 8. Only one SFM is active at a time, with the
optional second SFM in standby mode. By default, the SFM in slot
modify the default, include the appropriate
hierarchy level of the configuration, as described in the section about SFM redundancy
in the Junos System Basics Configuration Guide.
SFMs are hot-pluggable, as described in "M40e Field-Replaceable Units (FRUs)" on
page 157. Removing the standby SFM has no effect on router function. If the active SFM
fails or is removed from the chassis, the effect depends on how many SFMs are installed:
If there is one SFM, forwarding halts until the SFM is replaced and functioning again.
It takes approximately one minute for the replaced SFM to boot and become active;
reading in router configuration information can take additional time, depending on the
complexity of the configuration.
If there are two SFMs, the effect depends on which release of the Junos OS is running
on the router:
With Junos OS Release 5.4 and later, the standby SFM assumes forwarding functions
in less than one second.
With Junos OS Release 5.3 and earlier, forwarding halts while the standby SFM boots
and becomes active, which takes approximately 1 minute; synchronizing router
configuration information can take additional time, depending on the complexity of
the configuration.
Removing an SFM in an M40e Router on page 206
Installing an SFM in an M40e Router on page 207

Removing an SFM in an M40e Router

To remove an SFM (see Figure 113 on page 207):
Remove the rear component cover by loosening the thumbscrew at each corner of
1.
the cover and pulling it straight off the chassis. For complete instructions, see
"Reinstalling the M40e Components into the Chassis" on page 97.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
3.
the strap to one of the ESD points on the chassis. For more information about ESD,
see "Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series
Router" on page 232.
If you are removing the active SFM or CFEB-E, press and hold the online/offline button
4.
on the faceplate until the yellow LED labeled
(The effect of removing the active SFM or CFEB-E depends on whether a second SFM
or CFEB-E is installed.
SFM 0
sfm statement at the [edit chassis redundancy]
lights, which takes about 5 seconds.
FAIL
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is active. To