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212777-A, February 2002
13
Figures
Figure 1-1: The Router Legacy Network 29
Figure 1-2: Switch-Based Routing Topology 30
Figure 1-3: iBGP and eBGP 37
Figure 1-4: BGP Failover Configuration Example 38
Figure 1-5: DHCP Relay Agent Configuration 42
Figure 2-1: Example 1: Multiple VLANs with Tagging Gigabit Adapters 46
Figure 2-2: Example 2: Parallel Links with VLANs 48
Figure 2-3: Using Multiple Instances of Spanning Tree Protocol 51
Figure 2-4: VLAN 3 Isolated in a Single Spanning Tree Group 52
Figure 2-5: Implementing Multiple Spanning Tree Groups 53
Figure 2-6: Default Gateways per VLAN 58
Figure 2-7: Jumbo Frame VLANs 64
Figure 3-1: Port Trunk Group 65
Figure 3-2: Port Trunk Group Configuration Example 67
Figure 4-1: OSPF Area Types 70
Figure 4-2: OSPF Domain and an Autonomous System 71
Figure 4-3: Injecting Default Routes 78
Figure 4-4: OSPF Authentication 80
Figure 4-5: A Simple OSPF Domain 84
Figure 4-6: Configuring a Virtual Link 86
Figure 4-7: Summarizing Routes 90
Figure 4-8: Configuring OSPF Host Routes 92
Figure 5-1: Authentication and Authorization: How It Works 103
Figure 5-2: Monitoring Ports 113