r Switches Configuring SVIs IOS (4500, 6500, 3550, 3750, etc.) Hybrid Mode (4500, 6500) NX-OS (Nexus 7000, 5000) Multilayer Switch Models Cisco 6500 Multilayer Switches Architecture Buses Enhanced Chassis Vertical Enhanced Chassis Supervisors Modules CatOS Versus IOS Installing VSS Other Recommended VSS Commands VSS Failover Commands Miscellaneous VSS Commands VSS Best Practices 18. Cisco Nexus Nexus Hardware Table of Contents Nexus 7000 Nexus 5000 Nexus 2000 Nexus 1000 Series NX-OS NX-OS Versus IOS Nexus Iconography Nexus Design Features Virtual Routing and Forwarding Virtual Device Contexts Shared and Dedicated Rate-Mode Configuring Fabric Extenders (FEXs) Virtual Port Channel Config-Sync Configuration Rollback Upgrading NX-OS 19. Catalyst 3750 Features Stacking Interface Ranges Macros Flex Links Storm Control Port Security Voice VLAN 20. Telecom Nomenclature Telecom Glossary 21. T1 Understanding T1 Duplex Types of T1 Encoding Framing D4/Superframe Extended Super Frame Performance Monitoring Loss of Signal Out of Frame Table of Contents Bipolar Violation Errored Seconds Extreme Errored Seconds Alarms Red Alarm Yellow Alarm Blue Alarm Troubleshooting T1s Loopback Tests Integrated CSU/DSUs Configuring T1s CSU/DSU Configuration CSU/DSU Troubleshooting Framing C-Bits Clear-Channel DS3 Framing Line Coding Configuring DS3s Clear-Channel DS3 Channelized DS3 23. Frame Relay Ordering Frame Relay Service Frame Relay Network Design Oversubscription Local Management Interface Congestion Avoidance in Frame Relay Configuring Frame Relay Basic Frame Relay with Two Nodes Basic Frame Relay with More Than Two Nodes Frame Relay Subinterfaces Troubleshooting Frame Relay 24. MPLS 25. Access Lists Designing Access Lists Named Versus Numbered Wildcard Masks Table of Contents Where to Apply Access Lists Naming Access Lists Top-Down Processing Most-Used on Top Using Groups in ASA and PIX ACLs Deleting ACLs Turbo ACLs Allowing Outbound Traceroute and Ping Allowing MTU Path Discovery Packets ACLs in Multilayer Switches Configuring Port A