Restoring a Backed-Up Filesystem

Problem

You want to restore a filesystem that you backed up by taking a snapshot.

Solution

First, reboot the router from the alternate boot media to which you saved the snapshot. On M-series and T-series routers, this is the hard disk:

aviva@RouterA> request system software reboot media disk

On J-series routers, this is either a removable compact flash card or a device connected to the router's USB port:

	aviva@RouterA> request system software reboot media removable-compact-flash
	or
	aviva@RouterA> request system software reboot media usb

Then, retake the snapshot to copy the filesystem to the media from which you didn't boot:

	aviva@router1>  
request system snapshot

or

	aviva@RouterA> request system snapshot media removable-compact-flash

 

Discussion

The procedure for returning to a snapshot filesystem backup is very straightforward. You boot the router from the alternate media and then run the snapshot command again, which copies the filesystem from the alternate media to the media from which you didn't boot.M-series and T-series routers normally boot from the internal flash drive, and the hard disk is the alternate boot media. J-series routers also normally boot from an internal flash drive, and the alternate boot media is a compact flash card that is either installed in the router's compact flash drive or in a USB device connected to the router.

See Also

Recipes 1.19 and 1.20


Router Configuration and File Management

Basic Router Security and Access Control

IPSec

SNMP

Logging

NTP

Router Interfaces

IP Routing

Routing Policy and Firewall Filters

RIP

IS-IS

OSPF

BGP

MPLS

VPNs

IP Multicast



JUNOS Cookbook
Junos Cookbook (Cookbooks (OReilly))
ISBN: 0596100140
EAN: 2147483647
Year: 2007
Pages: 290
Authors: Aviva Garrett

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