Solace Systems, Inc.

Alcatel-lucent Canada Inc.

Steve Buchko

Shawn P McAllister

David W Horton

Duane Pauls

David Pochopsky

Connie Kwan

Daniel Adamski

In a message delivery system wherein messages having topic portion defining a topic and a body portion containing information relating to the defined topic are delivered to subscribers based on the topics associated with the messages, the messages are placed in a queue for delivery, and in the event of congestion one or more of the messages are replaced with discard indication messages containing the topics associated with the discarded messages without the corresponding body portions.

Topic discard indication

An assured message delivery system with resiliency receives messages from publishing client(s) and delivers them to subscribing clients. A primary system delivers the messages during normal operation. A secondary system mirroring the configuration of the primary system takes over responsibility for delivering the messages in the event of failure of the primary system. The secondary system is connected to the primary system over a communications link. The primary system sends copies of the messages to the secondary system over the communications link. The secondary system stores replicate messages and sends acknowledgement messages back to the primary system.

Replication in assured messaging system

A method of propagating multicast subscription and routing information between routers in a network, and constructing forwarding tables in the routers, allowing providers of the data (the publishers), and the multicast recipients of the data (the subscribers) to be decoupled from and have no knowledge of one another. This is done without the need to maintain (Source Network, Published-Multicast-Group) State in the routers, for a highly scalable solution in those applications where there is a possibility for a large, or infinite number of Published-Multicast-Groups, and in those applications where messages are being routed by content, so it is impossible to identify published-multicast-groups.

Subscription Management and Routing Protocol (SMRP) and Method

A method for distributing aggregate routes that does not require a user to provision a next hop address or specify a redistribution policy is presented. Embodiments of the method utilize a modified command language interface (CLI) with a network device (e.g., router). In the various embodiments, the modified CLI is well-suited for use in routers that utilize interior gateway protocols such as open shortest path first (OSPF), routing information protocol (RIP), integrated intermediate system-to-intermediate system (ISIS), interior gateway routing protocol (IGRP), enhanced interior gateway routing protocol (EIGRP), and NetWare link services protocol (NLSP). In one or more embodiments, the invention has the advantage of providing an easier means of specifying aggregate routes, which saves user time and is less error-prone.

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Dunrobin, Canada

Steve Buchko