Needlenose pliers with grooved jaws (included in the media
upgrade kit)
Manually Switching from Master to Backup Routing Engine
On routers with two Routing Engines, one Routing Engine is the
master and one is the backup. By default, the Routing Engine in slot 0 is the master and the one in slot 1 is the backup.
If you are upgrading the master Routing Engine, you can switch mastership
so that routing can continue during the upgrade.
To switch Routing Engine mastership:
Enter CLI operational mode, and issue the following
command to copy the currently running and active file system partitions
on the router to standby partitions on the internal compact flash
disk.
user@host> request system snapshot
Wait until a message appears on the console confirming that
the procedure is complete.
For more information about the command, see the JUNOS System Basics and Services Command Reference.
To determine which Routing Engine is the master,
issue the following CLI command. The master Routing Engine is marked
as Master in the Current state field:
user@host> show chassis routing-engine
If the Routing Engine you are removing is the master,
issue the following CLI command to switch mastership to the standby
host module:
If the Routing Engines are running JUNOS Release 6.0 or later
and are configured for graceful switchover, the standby Routing Engine
immediately assumes Routing Engine functions and there is no interruption
to packet forwarding. Otherwise, packet forwarding halts while the
standby Routing Engine becomes the master and the Packet Forwarding
Engine components reset and connect to the new master Routing Engine.
For information about configuring graceful switchover, see the section
about Routing Engine redundancy in the JUNOS System Basics Configuration Guide.
Note:
Router performance might change if the standby Routing Engine's
configuration differs from the former master's configuration. For
the most predictable performance, configure the two Routing Engines
identically, except for parameters unique to a Routing Engine, such
as the hostname defined at the [edit system] hierarchy
level and the management interface (fxp0 or equivalent) defined
at the [edit interfaces] hierarchy level.
To configure Routing Engine-specific parameters and still use
the same configuration on both Routing Engines, include the appropriate
configuration statements under the re0 and re1 statements
at the [edit groups] hierarchy level and use the apply-groups statement. For instructions, see the JUNOS System Basics Configuration Guide.
Removing a Routing Engine
To remove a Routing Engine, follow this procedure:
Place an electrostatic bag or
antistatic mat on a flat, stable surface.
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
If the router is not powered
down already, use the console or other management device connected
to the Routing Engine you are removing to enter CLI operational mode
and issue the following command. The command shuts down the Routing
Engine cleanly, so its state information is preserved:
user@host> request system halt
Wait until a message appears on the console
confirming that the operating system has halted.
For more
information about the command, see the JUNOS System Basics and Services Command Reference.
Note:
The CFEB might continue forwarding traffic for approximately
5 minutes after the request system halt command has been
issued.
Note:
If the router is using a single Routing Engine, it continues
forwarding traffic for a few minutes after the request system
halt command has been issued. If the router uses more
than one Routing Engine, it continues forwarding traffic with a brief
halt while mastership is switched.
If there is a cover over the Routing Engine, unscrew
the screws holding the cover in place and remove the cover.
Remove the Routing Engine using one of the following
methods:
If the Routing Engine has ejector handles at each end
of its faceplate, use a screwdriver to loosen and remove any screws
installed in the ejector handles. Push the ends of the ejector handles
outward to unseat the Routing Engine from the chassis.
If the Routing Engine has thumbscrews, loosen the thumbscrews
securing the Routing Engine, using a screwdriver if necessary.
Grasp the handle or, if the Routing Engine
does not have a handle, grasp the ejector handles and slide the unit
about halfway out of the chassis.
Caution:
Be careful to slide the Routing Engine straight out of the
chassis. Damage can result if it gets lodged because of uneven movement.
Place one hand under the Routing Engine to support
it, slide it completely out of the chassis, and place it on the antistatic
mat or in the electrostatic bag.
Removing or Inserting the Compact Flash Disk Secured by a Clasp
The internal compact flash disk is located in a slot on the
Routing Engine board and is secured by a plastic or wire clasp on
the following Routing Engines:
RE-400
RE-600 (located beneath the hard drive)
RE-850
RE-1600 (located beneath the hard drive)
RE-S-1300
RE-S-2000
For more information on removing or inserting the compact flash
disk for these Routing Engines, see the following procedures:
To remove the internal compact flash disk, follow this procedure
(see Figure 1 or Figure 2):
Note:
Depending on your configuration, the router might not have an
internal compact flash disk. If there is no internal compact flash
disk installed, you can proceed directly to the next section, Inserting the Internal
Compact Flash Disk.
Place an electrostatic bag or
antistatic mat on a flat, stable surface.
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
Use needlenose pliers with grooved jaws to pull
the wire clasp out from under the compact flash disk and lift it up
(see Figure 1 or Figure 2).
Use the needlenose pliers to gently grasp the compact
flash disk and slide it out of the connector. Place the compact flash
disk on the antistatic mat or in the electrostatic bag.
Figure 1: Removing
the Internal Compact Flash Disk from a Routing Engine 400, 850, S-1300,
or S-2000
Figure 2: Removing the Internal
Compact Flash Disk from a Routing Engine 600 or 1600
Inserting the Internal
Compact Flash Disk
To insert the internal compact flash disk, follow this procedure
(see Figure 3 or Figure 4):
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
If the compact
flash disk is in a PC Card adapter, slide it out of the adapter.
Orient the compact flash disk with the Juniper
Networks logo facing up. Slide the compact flash disk into the connector
on the Routing Engine (see Figure 3 or Figure 4).
Note:
If there is no Juniper Networks logo on the compact flash disk,
orient the compact flash disk so that the manufacturer product code
sticker is facing down.
Use needlenose pliers with grooved jaws to lower
and secure the wire clasp.
Figure 3: Inserting
the Internal Compact Flash Disk into a Routing Engine 400, 850, S-1300,
or S-2000
Figure 4: Inserting the Internal
Compact Flash Disk into a Routing Engine 600 or 1600
Removing or Inserting the Compact Flash Disk Secured by a Screw
The internal compact flash disk is located in a slot on the
Routing Engine board and is secured by a plastic nut and screw on
the following Routing Engines (see Figure 5):
RE-A-1000
RE-A-2000
Figure 5: Routing Engine
A-1000 and A-2000 Compact Flash Components
For more information on how to remove or insert the compact
flash disk for these Routing Engines, see the following procedures:
Use needlenose pliers with grooved jaws to hold
the plastic nut in place.
With your other hand, use a 3/16–in flat-blade
screwdriver to remove the plastic screw (see Figure 6).
Figure 6: Removing the Screw Securing
the Internal Compact Flash on a Routing Engine A–1000 or A–2000
Gently
grasp the sides of the compact flash disk and slide it out of the
connector (see Figure 7). Place the compact flash disk on the antistatic mat or in
the electrostatic bag.
Figure 7: Removing
the Internal Compact Flash Disk from a Routing Engine A–1000
or A–2000
Inserting the Internal Compact Flash Disk
To insert the internal compact flash disk, follow this procedure:
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
If the compact
flash disk is in a PC Card adapter, slide it out of the adapter.
Orient the compact flash disk with the Juniper
Networks logo facing down. Slide the compact flash disk into the connector
on the Routing Engine (see Figure 8).
Note:
If there is no Juniper Networks logo on the compact flash disk,
orient the compact flash disk so that the manufacturer’s product
code sticker is facing up.
Figure 8: Inserting the Internal
Compact Flash Disk into a Routing Engine A–1000 or A–2000
Use needlenose
pliers with grooved jaws to hold the plastic nut in place directly
below the hole for the screw.
With your other hand, use a 3/16–in flat-blade
screwdriver to tighten the plastic screw (see Figure 9).
Figure 9: Replacing
the Screw to Secure the Internal Compact Flash on a Routing Engine
A–1000 or A–2000
To install the Routing Engine, follow this procedure:
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
If the Routing Engine has
ejector handles, verify that the ejector handle at each end of the
Routing Engine is flipped toward the outer edge of the unit. If necessary,
use your thumbs to push and hold the red tab on each ejector handle
toward the outer edge, then push the ends of the ejector handles outward.
Place one hand under the Routing Engine to support
it and grasp the handle on the faceplate with the other hand.
Align the rear of the Routing Engine with the guide
rails inside the chassis and slide it in completely.
Caution:
Be careful to align the Routing Engine correctly with the guide
rails and push it in evenly. Damage can result if it gets lodged in
the rails because of uneven movement.
Secure the Routing Engine using one of the following
methods:
If the Routing Engine has ejector handles, press the ejector
handle at each end of the Routing Engine inward to seat the unit firmly
in the chassis. If you removed screws from the ejector handles when
you removed the Routing Engine, replace them and use a screwdriver
to tighten them.
If the Routing Engine has thumbscrews, tighten the thumbscrews
securing the Routing Engine, using a screwdriver if necessary.
If there was a cover over the Routing Engine
that you removed, reinstall the cover and tighten the screws to secure
it to the chassis.
You can verify correct Routing Engine functioning
by issuing the show chassis routing-engine command.
Configuring the Internal Compact Flash Disk
After installing the internal
compact flash disk for the first time, you must copy the software
from the Routing Engine's hard disk to the internal compact flash
disk.
Note:
RE-A-1000 and RE-A-2000 require JUNOS Release 8.1R2 or later
to function properly with the 1 GB compact flash disk. RE-S-1300 and
RE-S-2000 require JUNOS Release 8.2 or later to function properly
with the 1 GB compact flash disk.
Note:
To configure the internal compact flash disk, you must be connected
to the Routing Engine through the console or other management device.
On the console or other management device connected
to the Routing Engine, boot from the hard drive.
Note:
If the compact flash disk has not yet been partitioned with
JUNOS software, you may get an error message and prompted for a keystroke.
If after pressing the keystroke, the Routing Engine does not immediately
boot from the hard drive, it may take up to 10 minutes for the Watchdog
timer to reset the Routing Engine and boot from the hard drive.
Enter CLI operational mode, and issue the following
command to copy the currently running and active file system partitions
on the router to standby partitions on the internal compact flash
disk.
user@host> request system snapshot partition
Wait until a message appears on the console
confirming that the procedure is complete.
For more information
about the command, see the JUNOS System Basics and Services Command Reference.
Issue the following command to reboot the router's software:
user@host> request system reboot
The internal compact flash disk will now be the primary boot
device.
You can verify correct boot order by issuing the show system boot-messages command. The output lists the devices
mounted. The internal compact flash disk is located at ad0.
For more information about the command, see the JUNOS System Basics and Services Command Reference.
