Extreme Networks ExtremeWorks Premier Plus - Extended service agreement - parts and labor - 1 year - on-site - response time: NBD - for P/N: 71G21K2L2-48P Premier support from Extreme Networks, is a proactive, high touch post sale support service that assists customers in supporting their Extreme Networks products and network. All resources and deliverables are designed to manage your day-to-day technical needs, provide analysis and recommendations while building strong customer relationships, all focused on keeping your network performing at optimal levels.