The PowerPak additional software for SAN Switch 2/32 includes Fabric Watch, ISL Trunking, Remote Switch, Extended Fabric, and Performance Monitor. Performance Monitor enables the ability to monitor and watch specific fabric metrics from a SID (Source ID) to a DID (Destination ID), creating a method to be able to fine-tune and scale your fabric more efficiently. Performance Monitoring also allows the ability to have an early warning detection of hot spots within the fabric providing a powerful tool for maintaining overall balanced performance. Fabric Watch enables each switch to monitor the SAN for potential faults and automatically alert network managers to problems before they become failures. Fabric Watch tracks a variety of SAN fabric elements, events, and counters. Monitoring fabric-wide events, ports, SFPs, and environmental parameters permits early fault detection and isolation as well as performance measurement. ISL Trunking - this optional license logically groups up to four E-ports to provide a high bandwidth trunk between two switches.