Automatic hardware failure detection and recovery for distributed max sessions server

US8078715B2 · kind B2 · utility

Assignee

• Cisco Technology, Inc. · US

Inventors

• Darrell Myers Shively, II · معلمی نژاد, US
• John M. Knight · Lake Forest, US
• Kavita Shekhar Patil · Westford, US
• Pauline Chen Boyd · Irvine, US
• Sonny Bui · Tecate Mission Road, US
• Thomas Anthony Roden · Irvine, US

Key dates

• Filing date: Oct 19, 2010
• Grant date: Dec 13, 2011
• Expiry date: Oct 19, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L69/40
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A Max Sessions Server (MSS) automatically detects hardware and communications failures. Upon detection, counters are adjusted accordingly to maintain an accurate count of users or groups of users on a system. A database of unique identifiers for each connection is maintained, where the unique identifier is a concatenation of a Network Access Server (NAS) and the connection's incoming NAS node number. If a user requests permission to log into the system, the MSS first checks the database to determine if the unique identifier is already logged in. If so, then a hardware or communications failure has occurred and the MSS must make the appropriate adjustments to the database and counter.