Supported Platforms
Performing a Software Recovery Installation for an XRE200 External Routing Engine
This process can be used in any scenario when a software recovery upgrade of an XRE200 External Routing Engine is needed. A software recovery upgrade might be needed in several scenarios, including cases when the CLI prompt is unreachable or the external Routing Engine is continually rebooting and other troubleshooting methods have failed to address the problem.
This procedure copies the Junos OS image on USB flash memory onto an XRE200 External Routing Engine. The external Routing Engine then boots using that Junos OS image.
Ensure that you have the following tools and parts available:
- A USB flash drive that meets the EX Series switch USB port specifications. See USB Port Specifications for an XRE200 External Routing Engine.
- A computer or other device that you can use to download the software package from the Internet and copy it to the USB flash drive.
To perform a software recovery installation:
- Download the Junos OS package that you would like to place
onto the external Routing Engine from the Internet onto the USB flash
drive by using your computer or other device. See Downloading Software Packages from Juniper Networks.
Note: In most cases, you should download the Junos OS image running on the other devices in your EX8200 Virtual Chassis onto USB flash memory. Booting the external Routing Engine with the same software currently running within the EX8200 Virtual Chassis ensures that the external Routing Engine will be recognized by the other Virtual Chassis member devices after the recovery upgrade.
- Remove the USB flash drive from the computer or other device.
- Insert the USB flash drive into the USB port on the external Routing Engine.
- Power off the external Routing Engine. See Powering Off an XRE200 External Routing Engine.
- Reconnect power to the external Routing Engine: When you
see the following prompt:
Hit [Enter] to boot Immediately or [R] key to start recovery ...
press the R key to select the recovery software upgrade procedure.
- Start the recovery: When the following prompt appears
on your external Routing Engine:
Select one of the following options ... 1. Reboot the system with out making any changes. 2. Start Recovery. Choice :
press the the 2 key.
Note: If you have loaded multiple software recovery packages onto the USB flash drive, you are prompted to select which package to use for the recovery. See request system software recovery-package for additional information.
Press the 2 key.
- Monitor the output:
Starting Recovery Process ... (user@switch, Wed Aug 18 16:30:02 IST 2010) Loading /boot/defaults/loader.conf /kernel text=0x4a6878 data=0x354e0+0x5edf4 syms=[0x4+0x601a0 +0x4+0x8a749 / Hit [Enter] to boot immediately, or space bar for command prompt. OK boot GDB: debug ports: uart GDB: current port: uart KDB: debugger backends: ddb gdb KDB: current backend: ddb 262144K of memory above 4GB ignored Copyright (c) 1996-2010, Juniper Networks, Inc. All rights reserved. Copyright (c) 1992-2006 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. JUNOS 10.4I #0: 2010-07-20 04:46:37 UTC user@switch:/b/user/current/XRE-200/obj-i386/bsd/sys/compile/INSTALL-EXInstall EXInstall File: /tmp/cf/packages/jinstall-ex-xre200-10.4R1.5-domestic-signed.tgz Rebooting to complete the installation. Please wait...
The external Routing Engine reboots to complete the procedure.
- When you see the CLI prompt, remove the USB flash memory card from the USB port on the external Routing Engine.
