| US 7,353,259 B1 | ||
| Method and apparatus for exchanging configuration information between nodes operating in a master-slave configuration | ||
| Mark A. Bakke, Maple Grove, Minn. (US); James D. Muchow, Zimmerman, Minn. (US); Craig A. Johnson, Maple Grove, Minn. (US); and Donald W. Teske, Eden Prairie, Minn. (US) | ||
| Assigned to Cisco Technology, Inc., San Jose, Calif. (US) | ||
| Filed on Apr. 22, 2002, as Appl. No. 10/128,657. | ||
| Application 10/128657 is a continuation in part of application No. 10/094552, filed on Mar. 07, 2002. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 15/16 (2006.01); G06F 11/00 (2006.01); G06F 15/173 (2006.01) | ||
| U.S. Cl. 709—208 [714/4; 714/11; 714/12; 714/13; 709/223] | 23 Claims |
| 1. A method for maintaining configuration information at a first node, wherein the first node is connected by one or more
networks to one or more other nodes which operate in a master-slave configuration, the method comprising:
determining with a multiple instance heartbeat message including multiple configuration identifier fields whether configuration
information for an application instance being managed by the first node is current, wherein the application instance is operating
on the first node in at least one of a master and a slave configuration;
if the configuration information at the first node is not current, establishing a Hyper-Text Transfer Protocol (HTTP) connection
with a remote node of the one or more other nodes from which updated configuration information can be obtained;
requesting the updated configuration information from the remote node; and
receiving the updated configuration information, the updated configuration information including a configuration identifier
and providing data for operation of the application instance.
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