Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)

Most routing problems in a real enterprise are not caused by a protocol failing outright. They come from interactions: a redistribution point that creates a loop, a BGP attribute set in the wrong direction, an OSPF area type that silently drops external routes. Finding and fixing these issues quickly is what separates a capable administrator from a senior network engineer.

Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI) is built around that skill. It takes the routing foundation covered in ENCOR and goes much deeper, with a strong emphasis on troubleshooting.

The largest part of the course deals with Layer 3 technologies. You will work through EIGRP in classic and named mode, including feasible successors, stub routing, and unequal-cost load balancing. You will analyse OSPFv2 and OSPFv3 network types, area types, virtual links and path preference. BGP receives detailed treatment, from neighbour states and authentication to path attributes, route reflectors and inbound and outbound policies. Administrative distance, summarisation, route maps, redistribution and loop prevention tie these protocols together.

The course then covers VPN technologies. You will configure single-hub DMVPN using mGRE, NHRP and IPsec, and learn how MPLS label switching and Layer 3 VPNs operate. Infrastructure security follows, with AAA using TACACS+ and RADIUS, IPv4 and IPv6 filtering, uRPF, Control Plane Policing, and IPv6 first-hop security.

Finally, infrastructure services bring everything into day-to-day operations: secure device management, SNMPv3, syslog and conditional debugs, DHCP for IPv4 and IPv6, IP SLA, NetFlow and Cisco Catalyst Center Assurance. Together, these topics make this Cisco ENARSI training a practical, exam-aligned course for advanced enterprise routing.

Course Objectives

By the end of this course, learners will be able to:

• Troubleshoot EIGRP for IPv4 and IPv6, including neighbour relationships, feasible successors, stub routing, metrics and load balancing.
• Troubleshoot OSPFv2 and OSPFv3 across different network types, area types and router roles, including virtual links and path preference.
• Configure and troubleshoot iBGP and eBGP, including neighbour relationships, path attributes, best-path selection, route reflectors and routing policies.
• Control routing behaviour with administrative distance, route maps, summarisation, redistribution, policy-based routing and VRF-Lite, while preventing routing loops.
• Implement single-hub DMVPN with mGRE, NHRP and IPsec, and describe MPLS operations and MPLS Layer 3 VPNs.
• Secure routers and the control plane with AAA, IPv4 ACLs, IPv6 traffic filters, uRPF and CoPP, and describe IPv6 first-hop security features.
• Troubleshoot infrastructure services, including device management, SNMP, logging, DHCP, IP SLA, NetFlow, and Cisco Catalyst Center Assurance.