CCNP Service Provider case studies
CCNP Service Provider · Put your knowledge to work in context.
The CCNP Service Provider is a professional-level Cisco certification aimed at network engineers who design, deploy, and operate service provider networks. Candidates typically already hold a CCNA-level foundation and work with routing, MPLS, and transport technologies in carrier or large-enterprise environments. The CCNP Service Provider case studies are 5 cases and about 4,695 words.
1Containing 500 Flapping Cell Sites in a Single-Level IS-IS Domain
Your network runs one IS-IS Level-2 area across 1,850 routers: 24 P routers, 900 PEs, and roughly 900 aggregation/access devices, with LDP and iBGP sessions to two route reflectors. You are adding 500 cell-site routers for 5G backhaul, some on 20 Mbps microwave links that flap several times a day during weather events.
894 words, about 4 min2Two Route Reflectors, 2.09 Million Prefixes, and a 90-Second Failover
Two route reflectors on 16 GB, 8-core appliances serve 900 PEs in a single cluster: 1.35 M IPv4 unicast prefixes, 260,000 VPNv4, and 480,000 IPv6. Each PE peers only with the two RRs.
905 words, about 5 min3Retail L3VPN: Firewall-Inspected Data but Direct Store-to-Store Voice
A retail customer buys MPLS L3VPN for 620 stores, one hub data center with a firewall, and a shared-services VRF hosting DNS, NTP, and PCI logging. Stores attach to three regional PEs and run eBGP to the PE.
920 words, about 5 min4A Saturated CDN Peer and the Limits of Prepend and MED
A wholesale provider has four transit providers and 14 private peers across two IXPs. Egress selection follows the usual hierarchy: customer routes first, then peers, then transit, with IGP metrics breaking ties inside the peer tier.
965 words, about 5 min530-Second Counters on 4,800 Devices Without a Polling Storm
Network operations manages 4,800 devices: 3,200 IOS-XR, 900 NX-OS, and 700 third-party platforms that expose only SNMP and a CLI. Monitoring polls 6,000 OIDs every 300 seconds; the collectors run at 92 percent CPU and 11 percent of polls time out, so on-call engineers no longer trust the graphs and log in over CLI to check interfaces by hand.
1,011 words, about 5 min