ecting VLANs Configuring VLANs CatOS IOS Using VLAN Database IOS Using Global Commands Nexus and NX-OS 5. Trunking How Trunks Work 802.1Q Which Protocol to Use Trunk Negotiation Configuring Trunks CatOS Nexus and NX-OS 6. VLAN Trunking Protocol VTP Pruning Dangers of VTP Configuring VTP VTP Domains VTP Mode VTP Password VTP Pruning 7. Link Aggregation EtherChannel EtherChannel Load Balancing Configuring and Managing EtherChannel Cross-Stack EtherChannel Multichassis EtherChannel (MEC) Virtual Port Channel Initial vPC Configuration Adding a vPC 8. Spanning Tree Broadcast Storms MAC Address Table Instability Preventing Loops with Spanning Tree How Spanning Tree Works Managing Spanning Tree Additional Spanning Tree Features PortFast BPDU Guard UplinkFast BackboneFast Common Spanning Tree Problems Duplex Mismatch Unidirectional Links Bridge Assurance Designing to Prevent Spanning Tree Problems Use Routing Instead of Switching for Redundancy Always Configure the Root Bridge Table of Contents 9. Routing and Routers Routing Tables Route Types The IP Routing Table Host Route Subnet Summary (Group of Subnets) Major Network Supernet (Group of Major Networks) Default Route Virtual Routing and Forwarding 10. Routing Protocols Communication Between Routers Metrics and Protocol Types Administrative Distance Specific Routing Protocols RIPv2 EIGRP 11. Redistribution Redistributing into RIP Redistributing into EIGRP Redistributing into OSPF Mutual Redistribution Redistribution Loops Limiting Redistribution Route Tags A Real-World Example 12. Tunnels GRE Tunnels GRE Tunnels and Routing Protocols GRE and Access Lists 13. First Hop Redundancy HSRP Interface Tracking When HSRP Isn't Enough Table of Contents Nexus and HSRP Object Tracking in GLBP 14. Route Maps Building a Route Map Policy Routing Example Monitoring Policy Routing 15. Switching Algorithms in Cisco Routers Process Switching Interrupt Context Switching Fast Switching Optimum Switching Configuring and Managing Switching Paths Process Switching Fast Switching 16. Multilaye