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Method-and-apparatus-for-performing-a-software-upgrade-of-a-router-while-the-router-is-online

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Method and apparatus for performing a software upgrade of a router while the router is online

Details

Inventors: Kwok, Raymond Wai-man; Klein, Larry Albert; Vaidyanathan, Sriram;
Assignee: Pluris, Inc. (Cupertino, CA)
Primary Examiner: Eng; David Y.
Assistant Examiner:
Attorney, Agent or Firm: Boys; Donald R. Central Coast Patent Agency, Inc.

A method for performing an in-service software upgrade to a data router follows steps of (a) providing a source node hosting an upgrade software package; (b) causing an upgrade command to be executed; (c) establishing, as a result of the upgrade command, a network session between the data router and the source node; (d) receiving the upgrade software at the router; (e) copying and distributing, within the router, the upgrade software to designated components slated for upgrade; (f) designating one or more components in the router as backups for each component to be upgraded; (g) backing up services and software running on each target element to be upgraded to designated backup element or elements while upgrade proceeds for the target element; (h) causing a switchover at the target element to the new software; and (i) repeating steps (g) and (h) until all the components slated for upgrade are upgraded.

DETAILED DESCRIPTION What is claimed is: 1.
A method for performing an in-service software upgrade to a data router comprising steps of: (a) providing a source node hosting an upgrade software package; (b) causing an upgrade command to be executed; (c) establishing, as a result of the upgrade command, a network session between the data router and the source node; (d) receiving the upgrade software at the router; (e) copying and distributing, within the router, the upgrade software to designated components slated for upgrade; (f) designating one or more components in the router as backups for each component to be upgraded; (g) backing up services and software running on each target element to be upgraded to designated backup element or elements while upgrade proceeds for the target element; (h) causing a switchover at the target element to the new software; and (i) repeating steps (g) and (h) until all the components slated for upgrade are upgraded.
2.
The method of claim 1 wherein the data-packet-network is the Internet network.
3.
The method of claim 1 wherein in step (a) the source location node is an FTP server and the upgrade software package is stored in memory of the server.
4.
The method of claim 1 wherein in step (a) the source location node is a PCMCIA flash card installed in a network-connected computer, the upgrade software package residing on the card.
5.
The method of claim 1 wherein in step (a) the source location node is a PCMCIA flash system residing within the router, the upgrade software package residing in the flash system.
6.
The method of claim 1 wherein in step (b) execution of the upgrade command is manual and initiated by a user.
7.
The method of claim 1 wherein in step (b) execution of the upgrade command is automated and triggered at pre-set time.
8.
The method of claim 1 wherein in step (c) the data network session is conducted over an Ethernet network between the source location node and the receiving component of the router.
9.
The method of claim 8 wherein in step (c) the source location node is an FTP server and receiving router component is a primary control card

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