Cisco ENARSI 300-410 case studies
Cisco ENARSI 300-410 · Put your knowledge to work in context.
The Cisco ENARSI 300-410 exam (Implementing Cisco Enterprise Advanced Routing and Services) is the concentration exam most commonly paired with the ENCOR core exam to earn the CCNP Enterprise certification. It is aimed at network engineers who already configure and troubleshoot enterprise routing and services day to day and want to prove deeper, hands-on depth: advanced routing protocols, path control, VPN technologies, infrastructure security, and infrastructure services. The Cisco ENARSI 300-410 case studies are 5 cases and about 4,248 words.
1Mutual Redistribution Between OSPF and EIGRP at Two Boundary Routers
Two merged companies still run separate routing domains. R1 runs OSPF process 10 (areas 0 and 5) and R2 runs EIGRP AS 100.
872 words, about 4 min2DMVPN Phase 2 Spokes Never Build Direct Tunnels
A managed service provider runs a hub-and-spoke WAN as DMVPN Phase 2. The hub has one mGRE Tunnel0 (172.16.1.1/24), 60 spokes register through NHRP with tunnel addresses 172.16.1.11 to 172.16.1.70, EIGRP AS 100 runs inside the tunnel, and every router protects the tunnel with tunnel protection ipsec profile DMVPN in transport mode.
861 words, about 4 min3Strict uRPF on a Dual-Homed Edge Drops Inbound Traffic
A regional company edge router R1 is dual-homed to two providers. The public prefix 198.51.100.0/24 is advertised to both ISPs over eBGP, and the internal network is 10.50.0.0/16.
850 words, about 4 min4Provider-Assigned NAT Breaks During ISP Failover
R1 is the only edge router for an office of 4,000 users with internal network 10.20.0.0/16. It has two uplinks: ISP-A on GigabitEthernet0/0 (203.0.113.2/30) and ISP-B on GigabitEthernet0/1 (198.51.100.2/30).
829 words, about 4 min5Replacing CLI Screen-Scraping Automation on 300 Branch Routers
An operations team manages 300 Cisco IOS-XE branch routers running a mix of 16.12 and 17.3. Their change process is a Python script that opens an SSH session with Paramiko, sends configuration line by line, and waits for the prompt string.
836 words, about 4 min