CCNP Enterprise case studies
CCNP Enterprise · Put your knowledge to work in context.
CCNP Enterprise (Cisco Certified Network Professional Enterprise) is the professional-level credential in Cisco's enterprise networking track. It sits above CCNA and is aimed at engineers who design, deploy, secure, and operate campus and branch networks - typically people with a few years of hands-on routing, switching, and wireless experience who want to move into senior engineering, design, or operations roles, or who need a formal validation of that skill set for a client, employer, or consulting practice. The CCNP Enterprise case studies are 6 cases and about 6,355 words.
1Single-Area OSPF Across a Carrier L2 Handoff
Northwind Health runs two campuses joined by a carrier-provided 1 Gbps Layer 2 handoff plus a 300 Mbps internet circuit at each site. Cleveland has 1,800 users and 42 access stacks; Akron has 600 users and 14.
1,130 words, about 6 min2VXLAN/EVPN Stretch: Two Symptoms, Two Causes
A retailer is refreshing two data halls 6 km apart into a spine-leaf fabric: 44 ESXi hosts, 4 spines, 8 leaves, 25 GbE server ports and 100 GbE uplinks. The underlay is routed OSPF on /31 links.
974 words, about 5 min3Nightly Replication, Voice Gaps, and a Flapping HSRP Pair
At a manufacturing plant the distribution pair runs HSRP group 10 (172.20.10.1) with priorities 110 and 100 and preempt enabled on both. The two switches sit in separate MDFs and reach each other only through a 1 Gbps trunk that crosses the core, so HSRP hellos share that link with user traffic.
1,061 words, about 5 min4Monitoring That Could Not Explain a 20-Minute Outage
A 2,300-device estate (1,900 Catalyst switches, 320 APs, 80 branch routers) is polled by a single SNMP collector across a 50 Mbps management WAN link that averages 78% utilization. The collector polls 48 interface counters plus six ifXTable OIDs on every device every 30 seconds, and the same link carries syslog.
1,004 words, about 5 min5802.1X at a Hospital: Closed Mode, MAB, and Devices That Cannot Change
A hospital is deploying 802.1X on 6,200 wired ports across three buildings. About 900 endpoints cannot run a supplicant: badge readers, label printers, infusion pumps, and 40 imaging devices from a vendor that requires a fixed IP address and states in writing that no network change is permitted.
1,136 words, about 6 min6A 480-Router Push, a Broken Regex, and a CI/CD Proposal
A retail chain has 480 branch routers (IOS-XE 17.9) managed from hand-edited templates. Last quarter a bulk change to add an NTP server pushed to all 480 in a single Ansible run.
1,050 words, about 5 min