Inside Cisco IOS Software Architecture Book

1. Fundamental IOS Software Architecture 2

Operating Systems Basics. CPU Resource Management and Multitasking. Memory Resource Management. Interrupts. IOS Architecture Overview. Memory Organization. Memory Pools. IOS Processes. Process Life Cycle. IOS Process Priorities. Process Examples. IOS Kernel. The Scheduler. The Memory Manager. Packet Buffer Management. System Buffers. Device Drivers. Summary.

2. Packet Switching Architecture.

Routing 101: Process Switching. Traffic Load Sharing with Process Switching. Disadvantages of Process Switching. Fast Switching: Caching to the Rescue. Fast Cache Organization. Maintaining the Cache. Traffic Load Sharing Considerations with Fast Switching. Optimum Switching. Cisco Express Forwarding. How CEF Works. Traffic Load Sharing with CEF. Summary.

3.Shared Memory Routers.

Hardware Architecture for Shared Memory Routers. CPU. Memory. Interface Controllers. Packet Buffers for Shared Memory Routers. Private Buffer Pools. Receive Rings and Transmit Rings. Packet Switching on a Shared Memory Router. Receiving the Packet. Switching the Packet. Transmitting the Packet. Summary.

4. Early Cbus Routers.

AGS+ Hardware Architecture. Packet Switching with the Cbus. Autonomous Switching. Cbus Fast Packet Memory. The Cisco 7000 Series Router. Summary.

5. Particle-Based Systems.

Buffer Management Using Particles. Particle Pools. Particle Coalescing. The Cisco 7200 Series Routers. Hardware Architecture. Memory. Packet Switching on the Cisco 7200 Series Routers. Packet Receive Stage. Packet Switching Stage. Packet Transmit Stage. Summary.

6. Cisco 7500 Routers.

Hardware Architecture of the Cisco 7500 Router. The Data Bus. Route Switch Processor. Packet Switching on the Cisco 7500 Router. RSP Switching: Receiving the Packet. RSP Switching: Switching the Packet. RSP Switching: Transmitting the Packet. VIP Architecture. VIP Components. VIP Models. VIP Packet Operations: Distributed Switching. VIP Receive Side Buffering. Troubleshooting Tips for the Cisco 7500 Router. High CPU Utilization. Input Drops. Ignores. Output Drops. Summary.

7. The Cisco Gigabit Switch Router: 12000.

Hardware Architecture. Switching Fabric. Maintenance Bus. Gigabit Route Processor. Line Card. Packet Switching. Packet Switching: Engine 0 and Engine 1. Packet Switching: Engine 2 LC. Packet Switching: Switching Cells across Fabric. Packet Switching: Transmitting Packets. Summary.

8. Quality of Service.

QoS Overview. Congestion Management. Congestion Avoidance. Priority Queuing. Configuring and Monitoring Priority Queuing. Custom Queuing. Weighted Fair Queuing. Platform-Independent WFQ. Configuring and Monitoring WFQ. Distributed Weighted Fair Queuing. Modified Deficit Round Robin. Configuration of MDRR. Weighted Random Early Detection. Configuration and Monitoring of WRED. Selective Packet Discard. Other QoS Features. Summary.

9. NetFlow Switching 200.

Flow Cache Maintenance. Flow Export. Router-Based Flow Aggregation Export (RBA).

Index.