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

When an organisation connects dozens of branches, data centers, and cloud platforms, routing stops being a simple matter of adding networks to a protocol. Engineers must decide which paths traffic should prefer, how routes move between protocols, and how to keep overlays secure. Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI) gives them the depth to make those decisions with confidence.

Routing in depth. The course opens with the interior protocols most enterprises run. You will troubleshoot EIGRP named mode, feasible successors and stuck-in-active conditions, and work through OSPFv2 and OSPFv3 area types such as stub, totally stub and NSSA, along with ABR and ASBR behaviour.

Policy and path control. Next comes the toolkit for shaping routing: administrative distance, route maps with tagging and filtering, manual and automatic summarisation, mutual redistribution, policy-based routing and VRF-Lite. You will also see how BFD speeds up failure detection.

BGP for the enterprise. iBGP and eBGP neighbour relationships, multihop and 4-byte AS numbers, path attributes and best-path selection, route reflectors and inbound and outbound policies are covered for both IPv4 and IPv6.

Secure connectivity. DMVPN with mGRE, NHRP and IPsec connects sites dynamically, while MPLS and MPLS Layer 3 VPN concepts explain how many service provider WANs work.

Security and services. AAA with TACACS+ and RADIUS, ACLs, IPv6 traffic filters, uRPF, CoPP, and IPv6 first-hop security protect the infrastructure. DHCP, SNMP, logging, IP SLA, NetFlow, and Cisco Catalyst Center Assurance help you keep it healthy.

This Cisco ENARSI training follows the 300-410 ENARSI blueprint closely and applies directly to production enterprise networks.

Course Objectives

Participants will learn to:

• Diagnose and resolve EIGRP issues involving neighbour adjacencies, authentication, stub configuration, metrics, and equal or unequal-cost load balancing.
• Troubleshoot OSPFv2 and OSPFv3 network types, special areas, router roles, virtual links and route preference.
• Build and troubleshoot BGP peerings and apply attribute-based policies, route reflection and filtering for IPv4 and IPv6.
• Manage route exchange between protocols using redistribution, route maps, tagging, summarisation and loop-prevention techniques.
• Steer traffic using policy-based routing and segment it with VRF-Lite.
• Deploy single-hub DMVPN with spoke-to-spoke tunnels, and explain MPLS label switching and Layer 3 VPNs.
• Protect and operate routers using AAA, ACLs, uRPF, CoPP, SNMPv3, syslog, DHCP, IP SLA, and NetFlow.