300-410 ENARSI

1.1 Troubleshoot administrative distance (all routing protocols) Read Administrative Distance Decisions Exposure · 14 min Preview Verify Competing Route Sources Validation · 24 min Lab Troubleshoot Unexpected Route Preference Troubleshooting · 24 min Lab Fix Administrative Distance Conflicts Troubleshooting · 24 min Lab

1.2 Troubleshoot route map for any routing protocol (attributes, tagging, filtering) Map Route-Map Match and Set Logic Exposure · 14 min Preview Validate Route-Map Attribute Changes Validation · 24 min Lab Troubleshoot Route-Map Filtering Troubleshooting · 24 min Lab Fix Broken Route-Map Sequences Troubleshooting · 24 min Lab

1.3 Troubleshoot loop prevention mechanisms (filtering, tagging, split horizon, route poisoning) Explain Routing Loop Prevention Exposure · 14 min Preview Verify Route Tags and Filters Validation · 24 min Lab Troubleshoot Split Horizon Effects Troubleshooting · 24 min Lab Troubleshoot Route Poisoning Signals Troubleshooting · 24 min Lab

1.4 Troubleshoot redistribution between any routing protocols or routing sources Plan Redistribution Boundaries Exposure · 14 min Build Controlled Redistribution Configuration · 24 min Lab Validate Redistributed Routes Validation · 24 min Lab Troubleshoot Missing Redistributed Routes Troubleshooting · 24 min Lab Troubleshoot Redistribution Loops Troubleshooting · 24 min Lab Use Tags to Control Redistribution Configuration · 24 min Lab Verify Redistribution Tag Policy Validation · 24 min Lab

1.5 Troubleshoot manual and auto-summarization with any routing protocol Explain Route Summarization Behavior Exposure · 14 min Build Manual Route Summaries Configuration · 24 min Lab Validate Summary and Specific Routes Validation · 24 min Lab Troubleshoot Bad Summary Masks Troubleshooting · 24 min Lab

1.6 Configure and verify policy-based routing Design Policy-Based Forwarding Exposure · 14 min Build Policy-Based Routing Configuration · 24 min Lab Verify Policy Routing Decisions Validation · 24 min Lab

1.7 Configure and verify VRF-Lite Plan VRF-Lite Segmentation Exposure · 14 min Build VRF-Lite Routing Configuration · 24 min Lab Verify VRF-Lite Isolation Validation · 24 min Lab

1.8 Describe Bidirectional Forwarding Detection Explain BFD Failure Detection Exposure · 14 min

1.9 Troubleshoot EIGRP (classic and named mode; VRF and global) Compare EIGRP Classic and Named Mode Exposure · 14 min Build EIGRP Address Families Configuration · 24 min Lab Verify EIGRP Neighbor Formation Validation · 24 min Lab Troubleshoot EIGRP Authentication Troubleshooting · 24 min Lab Interpret EIGRP Topology Values Validation · 24 min Lab Troubleshoot Stuck-In-Active Routes Troubleshooting · 24 min Lab Build EIGRP Stub Boundaries Configuration · 24 min Lab Verify EIGRP Stub Behavior Validation · 24 min Lab Configure EIGRP Unequal-Cost Load Balancing Configuration · 24 min Lab Verify EIGRP Load Sharing Validation · 24 min Lab Troubleshoot EIGRP Metrics Troubleshooting · 24 min Lab Troubleshoot EIGRP VRF Neighbors Troubleshooting · 24 min Lab

1.10 Troubleshoot OSPF (v2/v3) Compare OSPFv2 and OSPFv3 Operation Exposure · 14 min Build OSPFv2 and OSPFv3 Neighbors Configuration · 24 min Lab Verify OSPF Neighbor State Validation · 24 min Lab Troubleshoot OSPF Authentication Troubleshooting · 24 min Lab Interpret OSPF Network Types Validation · 24 min Lab Troubleshoot OSPF Area Types Troubleshooting · 24 min Lab Identify OSPF Router Roles Exposure · 14 min Build an OSPF Virtual Link Configuration · 24 min Lab Verify OSPF Virtual Link State Validation · 24 min Lab Troubleshoot OSPF Path Preference Troubleshooting · 24 min Lab Troubleshoot OSPF Summaries and Filters Troubleshooting · 24 min Lab Verify OSPF Database Evidence Validation · 24 min Lab

1.11 Troubleshoot BGP (Internal and External; unicast and VRF-lite) Compare iBGP and eBGP Behavior Exposure · 14 min Build IPv4 and IPv6 BGP Peering Configuration · 24 min Lab Verify BGP Session State Validation · 24 min Lab Troubleshoot BGP Next-Hop and Multihop Troubleshooting · 24 min Lab Interpret BGP Path Attributes Validation · 24 min Lab Troubleshoot BGP Policy Filtering Troubleshooting · 24 min Lab Validate Route Reflector Behavior Validation · 24 min Lab Troubleshoot BGP VRF-Lite Routes Troubleshooting · 24 min Lab

2.1 Describe MPLS operations (LSR, LDP, label switching, LSP) Explain MPLS Label Switching Exposure · 14 min Preview Map LSR and LDP Roles Exposure · 14 min Validate MPLS Forwarding Evidence Validation · 24 min Lab Trace an MPLS Label-Switched Path Validation · 24 min Lab

2.2 Describe MPLS Layer 3 VPN Explain MPLS Layer 3 VPN Roles Exposure · 14 min Map VPNv4 Route Exchange Exposure · 14 min Validate MPLS VPN Route Tables Validation · 24 min Lab Troubleshoot MPLS VPN Route Leaks Troubleshooting · 24 min Lab

2.3 Configure and verify DMVPN (single hub) Design a Single-Hub DMVPN Exposure · 14 min Build mGRE Tunnel Interfaces Configuration · 24 min Lab Build NHRP Hub and Spoke Registration Configuration · 24 min Lab Add IPsec Protection to DMVPN Configuration · 24 min Lab Verify DMVPN Neighbor Registration Validation · 24 min Lab Verify Spoke-to-Spoke Forwarding Validation · 24 min Lab Troubleshoot DMVPN NHRP Failures Troubleshooting · 24 min Lab Troubleshoot DMVPN IPsec Protection Troubleshooting · 24 min Lab Troubleshoot DMVPN Dynamic Neighbors Troubleshooting · 24 min Lab Troubleshoot DMVPN Spoke Reachability Troubleshooting · 24 min Lab

3.1 Troubleshoot device security using IOS AAA (TACACS+, RADIUS, local database) Plan AAA Fallback Behavior Exposure · 14 min Preview Build IOS AAA Method Lists Configuration · 24 min Lab Verify AAA Server Reachability Validation · 24 min Lab Troubleshoot AAA Login Failures Troubleshooting · 24 min Lab Troubleshoot AAA Authorization Issues Troubleshooting · 24 min Lab

3.2 Troubleshoot router security features Design Router ACL Controls Exposure · 14 min Build IPv4 Standard and Extended ACLs Configuration · 24 min Lab Build IPv6 Traffic Filters Configuration · 24 min Lab Verify Router Security Filters Validation · 24 min Lab Troubleshoot ACL Direction and Order Troubleshooting · 24 min Lab Build uRPF Protection Configuration · 24 min Lab Troubleshoot uRPF Drops Troubleshooting · 24 min Lab

3.3 Troubleshoot control plane policing (CoPP) (Telnet, SSH, HTTP(S), SNMP, EIGRP, OSPF, BGP) Explain Control-Plane Traffic Classes Exposure · 14 min Build a CoPP Policy Configuration · 24 min Lab Verify CoPP Classification Validation · 24 min Lab Troubleshoot CoPP Service Impact Troubleshooting · 24 min Lab

3.4 Describe IPv6 First Hop security features (RA guard, DHCP guard, binding table, ND inspection/snooping, source guard) Explain IPv6 First-Hop Attack Surfaces Exposure · 14 min Map IPv6 First-Hop Protection Features Exposure · 14 min Validate IPv6 First-Hop Protections Validation · 24 min Lab Troubleshoot IPv6 Edge Protection Side Effects Troubleshooting · 24 min Lab

4.1 Troubleshoot device management Map Device Management Paths Exposure · 14 min Preview Verify Console and VTY Access Validation · 24 min Lab Troubleshoot SSH and HTTPS Management Troubleshooting · 24 min Lab Troubleshoot SCP and TFTP Transfers Troubleshooting · 24 min Lab

4.2 Troubleshoot SNMP (v2c, v3) Compare SNMPv2c and SNMPv3 Operations Exposure · 14 min Verify SNMP Polling and Trap State Validation · 24 min Lab Troubleshoot SNMP Reachability and Credentials Troubleshooting · 24 min Lab

4.3 Troubleshoot network problems using logging (local, syslog, debugs, conditional debugs, timestamps, telemetry) Plan Logging and Telemetry Evidence Exposure · 14 min Verify Syslog and Timestamp Settings Validation · 24 min Lab Use Conditional Debugs Safely Troubleshooting · 24 min Lab Troubleshoot Missing Telemetry Evidence Troubleshooting · 24 min Lab

4.4 Troubleshoot IPv4 and IPv6 DHCP (DHCP client, IOS DHCP server, DHCP relay, DHCP options) Map DHCP Roles and Options Exposure · 14 min Build DHCP Relay for Routed Networks Configuration · 24 min Lab Verify DHCP Client and Server State Validation · 24 min Lab Troubleshoot DHCP Relay Failures Troubleshooting · 24 min Lab Troubleshoot DHCP Option Problems Troubleshooting · 24 min Lab

4.5 Troubleshoot network performance issues using IP SLA (jitter, tracking objects, delay, connectivity) Select IP SLA Operations Exposure · 14 min Build IP SLA and Object Tracking Configuration · 24 min Lab Verify IP SLA Statistics Validation · 24 min Lab Troubleshoot IP SLA Path Symptoms Troubleshooting · 24 min Lab

4.6 Troubleshoot NetFlow (v9, flexible NetFlow, Ipfix) Explain NetFlow Versions and Records Exposure · 14 min Verify Flexible NetFlow Export Validation · 24 min Lab Troubleshoot Missing Flow Records Troubleshooting · 24 min Lab

4.7 Troubleshoot network problems using Cisco Catalyst Center Assurance (formerly Cisco DNA Center) (connectivity, monitoring, device health, network health) Use Assurance Clues to Prioritize Incidents Exposure · 14 min