HP Cisco MDS 9020 Cisco MDS 9500 Series Hardware Installation Guide (OL-17467- - Page 43

Chapter 1 Product Overview Supervisor Modules Send documentation comments to [email protected]. Supervisor-1 Modules The Cisco MDS 9509 and 9506 Directors support up to two Supervisor-1 or Supervisor-2 modules that can be installed in slots 5 and 6 only. The main functions and components of the Supervisor-1 modules are as follows: • Control and Management, page 1-21 • Crossbar Switching Fabric, page 1-22 • Processor, page 1-22 • Port Interfaces, page 1-22 • LEDs on the Supervisor-1 Module, page 1-23 Note Supervisor-1 is not supported on the Cisco MDS 9513 Director. Figure 1-14 shows a Cisco MDS 9500 Series Supervisor-1 module. Figure 1-14 Cisco MDS 9500 Series Supervisor-1 Module 1 34 5 78 9 77688 2 6 1 Status, System, Active, and Pwr Mgmt LEDs1 2 Reset button 6 CompactFlash LED 7 CompactFlash eject button 3 Console port 4 MGMT 10/100 Ethernet port (with integrated Link and Activity LEDs) 5 COM1 serial port 8 CompactFlash slot 9 Asset tag 1. See Table 1-5 on page 1-24 for status LED descriptions. Control and Management The supervisor modules provide the following control and management features: • A redundant central arbiter that provides traffic control and access fairness. • A nondisruptive restart of a single failing process on the same supervisor. A kernel service running on the supervisor module keeps track of the high availability policy of each process and issues a restart when a process fails. The type of restart issued is based on the process's capability: - Warm or stateful (state is preserved) - Cold or stateless (state is not preserved) OL-17467-02 Cisco MDS 9500 Series Hardware Installation Guide 1-21