Replacing the M10i Routing Engine
The Routing Engines are hot-pluggable, as described in M10i Field-Replaceable Units (FRUs). If two Routing Engines are installed, removal or failure of the backup Routing Engine does not affect router function. Removal or failure of the master Routing Engine affects forwarding and routing depending on your high availability configuration. For detailed information, see M10i Routing Engine Description. To replace a Routing Engine, perform the following procedures:
Removing the M10i Routing Engine
To remove a Routing Engine (see Figure 1):
- Place an electrostatic bag or antistatic mat on a flat, stable surface.
- If two Routing Engines are installed, use
one of the following two methods to determine which is functioning
as master:
- Note which of the blue MASTER LEDs is lit on the Routing Engine faceplates.
- Issue the following CLI command. The master Routing Engine
is designated Master in the Current state field:
user@host> show chassis routing-engineRouting Engine status: Slot 0: Current state Master Election priority Master (default) Temperature 27 degrees C / 80 degrees F CPU temperature 27 degrees C / 80 degrees F DRAM 768 MB Memory utilization 45 percent CPU utilization: User 0 percent Background 0 percent Kernel 3 percent Interrupt 0 percent Idle 97 percent Model RE-5.0 Serial ID 1000647001 Start time 2009-01-28 14:11:50 PST Uptime 21 hours, 51 minutes, 16 seconds Load averages: 1 minute 5 minute 15 minute 0.00 0.02 0.00 Routing Engine status: Slot 1: Current state Backup Election priority Backup (default) Temperature 26 degrees C / 78 degrees F CPU temperature 27 degrees C / 80 degrees F DRAM 1536 MB Memory utilization 23 percent CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 99 percent Model RE-850 Serial ID 1000648260 Start time 2009-01-28 16:18:12 PST Uptime 19 hours, 44 minutes, 51 seconds
- If you are removing the master Routing Engine
and a second Routing Engine is installed, issue the following CLI
command to switch mastership to the backup host module:
user@host> request chassis routing-engine master switch
Note: Router performance might change if the backup 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.
- On the console or other management device connected
to the Routing Engine, enter CLI operational mode and issue the following
command to shut down the router software cleanly and preserve Routing
Engine state information.
user@host> request system haltNote: 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.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Loosen the thumbscrews located at each end of the Routing Engine faceplate, using a Phillips screwdriver if necessary.
- Grasp the handle and slide the unit about halfway
out of the chassis.
Caution: Slide the Routing Engine straight out of the chassis. Damage can result if the Routing Engine 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.
Figure 1: Removing a Routing Engine
Installing the M10i Routing Engine
To install a Routing Engine (see Figure 2):
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- 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: Align the Routing Engine carefully with the guide rails and push it in evenly. Damage can result if the Routing Engine gets lodged in the rails because of uneven movement.
- Tighten the thumbscrews on the Routing Engine faceplate
to secure the Routing Engine.
The Routing Engine might require several minutes to boot.
- After the Routing Engine boots, issue the show chassis routing-engine command to verify correct Routing Engine functioning.
Figure 2: Installing a Routing Engine
