NETWORK CONFIGURATION RESTORATION METHOD AND SYSTEM

• US 20090012966A1
• Filed: 07/03/2008
• Published: 01/08/2009
• Est. Priority Date: 07/03/2007
• Status: Active Grant

• Current Assignee: KDDI Corporation
• Original Assignee: KDDI Corporation
• Inventors: Horiuchi, Hiroki, Arai, Daisuke, Yoshihara, Kiyohito, Idoue, Akira
• Granted Patent: US 7,870,237 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 41/082 the condition being updates or upgrades of network functionality
• CPC Class Codes: H04L 41/0846 based on copy from other elements

Abstract

The present invention provides a network configuration restoration method and system which can perform restoration by copying past configuration files in a short time. An updating judging unit 304 judges updating of each network device by comparing an acquired configuration file and a registered configuration file linked to a first identifier representing a copy timing. A new save unit 312 acquires an updated configuration file from a network device, and links the updated configuration file to a first identifier and a second identifier which sets the current timing as a new save timing and saves it in a configuration file database 301. A save unit 311 copies a registered configuration file of a network device whose configuration file has not been updated and links it to a first identifier representing the copy timing and a second identifier linked to this configuration file and saves it.

Claims

1. A network configuration restoration method in which configuration files of network devices are saved in an operation server in response to a save request and registered configuration files designated by a restoration request issued subsequently are reconfigured into the network devices to restore network configurations, wherein

the operation server comprising a storage means which saves configuration files of the network devices in response to each save request by linking it to a second identifier representing a new save timing of each configuration files to the operation server and a first identifier representing a copy timing of each configuration files in the operation server, and

the operation server including the steps of:

identifying a network device which has an operation record in response to a current save request;

acquiring a configuration file from the identified network device;

judging updating of each identified network device by comparing the acquired configuration file and a registered configuration file linked to a first identifier representing the latest save timing;

saving the configuration file acquired from the network device whose configuration file has been updated by linking it to a first identifier and a second identifier representing a current save timing; and

copying a registered configuration file linked to the first identifier representing the latest save timing of a network device whose configuration file has not been updated, and linking it to a first identifier representing a current save timing and a second identifier linked to the configuration file and saving it.

2. The network configuration restoration method according to claim 1, wherein

the operation server further including the steps of:

receiving a restoration request including a restoration timing;

identifying a network device which has an operation record in response to the restoration request;

acquiring a configuration file from the identified network device;

judging updating of each identified network device by comparing the acquired configuration file and a registered configuration file linked to a first identifier representing the latest save timing;

saving the configuration file acquired from the network device whose configuration file has been updated by linking it to a first identifier and a second identifier representing a current save timing;

copying a registered configuration file linked to a first identifier representing the latest save timing of a network device whose configuration file has not been updated, and saving it by linking it to a first identifier representing a current save timing and a second identifier linked to the configuration file;

reading out a second identifier of a registered configuration file linked to a first identifier representing the latest save timing;

reading out a second identifier of the registered configuration file linked to the first identifier representing the restoration timing;

identifying a network device to be restored based on the result of comparison between the second identifiers of each network device; and

reconfiguring the registered configuration file linked to the first identifier representing the restoration timing into the identified network device.

3. The network configuration restoration method according to claim 2, wherein

among the network devices, in a network device in which a configuration file stored in a nonvolatile storage region is copied into a volatile storage region and executed, when the network device starts,

the step of reconfiguring the registered configuration file includes the steps of:

comparing the registered configuration file linked to the first identifier representing the latest save timing and the registered configuration file linked to the first identifier representing the restoration timing, and analyzing changed items and the contents of the changes;

generating a command for adding a deleted item whose content of change is “

deletion”

to the configuration file in the volatile storage region;

generating a command for deleting an added item whose content of change is “

addition”

from the configuration file in the volatile storage region;

generating a command for deleting a changed item whose content of change is “

change”

from the configuration file in the volatile storage region, and a command for adding the item before changing to the configuration file in the volatile storage region;

transmitting the commands to the network device and making it execute the commands; and

instructing each network device to copy the configuration file restored in the volatile storage region into the nonvolatile storage region.

4. A network configuration restoration system which saves configuration files of network devices in an operation server in response to a save request and configures registered configuration files designated by a restoration request issued subsequently into each network device to restore network configurations, wherein

the operation server includes:

a storage means for saving a configuration file by linking it to a second identifier representing a new save timing of the configuration file to the operation server and a second identifier representing a copy timing of the configuration file in the operation server;

an operation record monitoring means for monitoring operation records of each network device;

a configuration file acquiring means for acquiring a configuration file in response to the save request from a network device which has an operation record after the latest save timing;

an updating judgment means for judging updating of each network device by comparing the acquired configuration file and a registered configuration file linked to a first identifier representing the latest save timing;

a new save means for saving the configuration file acquired from a network device whose configuration file has been updated by linking it to a first identifier and a second identifier representing a current save timing; and

a save means for copying a registered configuration file linked to a first identifier representing the latest save timing of a network device whose configuration file has not been updated and registering it by linking it to a first identifier representing a current save timing and a second identifier linked to this configuration file into the storage means.

5. The network configuration restoration system according to claim 4, wherein

the operation server further includes:

an object-to-be-restored identifying means for identifying an network device to be restored in response to a restoration request including a restoration timing; and

a configuration file restoring means for reconfiguring a registered configuration file linked to a first identifier representing the restoration timing into the network device to be restored, and

the object-to-be-restored identifying means includes;

a first readout means for reading out a second identifier of a registered configuration file linked to a first identifier representing the latest save timing;

a second readout means for reading out a second identifier of a registered configuration file linked to the first identifier representing the restoration timing; and

a comparing means for comparing second identifiers of the network devices with each other, and identifies a network device to be restored based on a comparison result.

6. The network configuration restoration system according to claim 5, wherein

among the network devices, in a network device in which a configuration file that is stored in a nonvolatile storage region is copied into a volatile storage region and executed when the network device starts,

the configuration file restoring means includes:

a change analyzing means for analyzing a change item and details of the change by comparing a registered configuration file linked to a first identifier representing the latest save timing and a registered configuration file linked to a first identifier representing a restoration timing;

a first command generating means for generating a command for adding a deleted item whose content of change is “

deletion”

to the configuration file in the volatile storage region;

second command generating means for generating a command for adding an added item whose content of change is “

addition”

from the configuration file in the volatile storage region;

a third command generating means for generating a command for deleting a changed item whose content of change is “

change”

from the configuration file in the volatile storage region and a command for adding the item before changing to the configuration file in the volatile storage region;

a command transmitting means for transmitting the commands to a corresponding network device and making it execute the commands, and

a means for instructing each network device to copy a configuration file restored in the volatile storage region into the nonvolatile storage region.