Juniper Networks M10i manual Replacing the Routing Engine, Removing a Routing Engine

Chapter 13: Replacing Hardware Components

Replacing the Routing Engine

The Routing Engines are hot-pluggable, as described in “Field-Replaceable Units (FRUs)” on page 3. For a description of the effect of removing a Routing Engine, see “Routing Engine” on page 14. To replace a Routing Engine, perform the following procedures:

■Removing a Routing Engine on page 121

■Installing a Routing Engine on page 123

Removing a Routing Engine

To remove a Routing Engine, follow this procedure (see Figure 45):

1.Place an electrostatic bag or antistatic mat on a flat, stable surface.

2.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-engine

Routing Engine status:
Slot 0:
Current state	Master
...

3.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 standby host module:

user@host> request chassis routing-engine master switch

If the Routing Engines are configured for graceful switchover and are running a JUNOS release that supports 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.

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