List of Figures

Figure 1: Router Architecture
Figure 2: Routing and Forwarding Table Updates
Figure 3: Data Flow Through an M40e Router
Figure 4: Data Flow Through a T640 Routing Node
Figure 5: Process for Diagnosing Problems in Your Network
Figure 6: Network with a Problem
Figure 7: Levels in an IS-IS Network Topology
Figure 8: IS-IS Network Topology with Details
Figure 9: IS-IS Network Topology
Figure 10: Multi-Area OSPF Network Topology
Figure 11: OSPF Network Topology with Details
Figure 12: OSPF Network Topology
Figure 13: LSA Flooding Scopes
Figure 14: BGP Configuration Topology
Figure 15: BGP Network Topology
Figure 16: BGP Network Topology
Figure 17: Topology for ping and traceroute Command Examples
Figure 18: Chassis MIB Tree
Figure 19: System Application MIB Tree
Figure 20: Chassis MIB Tree
Figure 21: System Application MIB Tree
Figure 22: Three Areas Where a Software Crash Can Occur