Competencies: Networking > Routing
Routing
Body of Knowledge
| Topic | Description | Relevance | Career Tracks |
|---|---|---|---|
Static Routing |
Next-hop and interface-based static routes, floating statics, default routes, null routing for blackholes. Foundation for all routing concepts. |
Critical |
Network Engineer, Systems Administrator |
OSPF Single-Area |
Link-state fundamentals, LSA types 1-2, DR/BDR election, cost calculation, adjacency states (Down to Full). Most common enterprise IGP. |
Critical |
Network Engineer, Cloud Network Architect |
OSPF Multi-Area Design |
Area types (stub, NSSA, totally stubby), inter-area summarization, virtual links, ABR/ASBR roles. Scalable enterprise IGP. |
Critical |
Network Engineer, Cloud Network Architect |
BGP Fundamentals |
eBGP vs iBGP, AS numbers (2-byte, 4-byte), neighbor relationships, UPDATE messages, path attributes. Internet routing protocol. |
Critical |
Network Engineer, ISP Engineer |
BGP Path Selection |
13-step best path algorithm: weight, local preference, AS path length, origin, MED, communities. Advanced traffic engineering. |
High |
Network Engineer, ISP Engineer |
BGP Route Policies |
Route maps, prefix lists, AS-path filtering, community manipulation (standard, extended, large), BGP flowspec for DDoS mitigation. |
High |
Network Engineer, ISP Engineer, Security Engineer |
EIGRP |
Cisco-proprietary hybrid IGP, DUAL algorithm, successor/feasible successor, unequal-cost load balancing, named mode configuration. |
Medium |
Network Engineer (Cisco environments) |
IS-IS |
Link-state IGP for large-scale networks, NET addressing, Level 1/2 hierarchy, TLV extensibility. Common in service provider and hyperscaler networks. |
Medium |
ISP Engineer, Cloud Network Architect |
Route Redistribution |
Multi-protocol environments, redistribution metrics, route maps for filtering, preventing routing loops with tags. Enterprise integration. |
High |
Network Engineer, Network Architect |
Policy-Based Routing |
PBR for traffic steering beyond destination-based routing, route maps, set commands, next-hop tracking. Traffic engineering use cases. |
Medium |
Network Engineer, Network Architect |
VRF and VRF-Lite |
Virtual routing instances, route leaking, multi-tenancy without physical separation. Segmentation for compliance and security. |
High |
Network Engineer, Security Engineer |
Segment Routing (SR-MPLS) |
Source routing paradigm, segment ID (SID) allocation, TI-LFA for fast reroute, traffic engineering without RSVP. Modern WAN architecture. |
Medium |
Network Engineer, ISP Engineer |
SRv6 |
Segment Routing over IPv6, network programming model, service chaining, network slicing. Next-generation routing architecture. |
Low |
ISP Engineer, Cloud Network Architect |
IPv6 Routing |
OSPFv3, MP-BGP for IPv6, NDP/SLAAC, IPv6 address planning, dual-stack and IPv6-only deployments, NAT64/DNS64. |
High |
Network Engineer, Cloud Network Architect |
Personal Status
| Topic | Level | Evidence | Active Projects | Gaps |
|---|---|---|---|---|
BGP |
Intermediate |
Home lab eBGP peering between VyOS routers; understand path selection, communities, route filtering; studied for CCNP ENARSI |
No production BGP — no AS management, no IX peering, no large-scale route policy |
|
OSPF |
Intermediate |
Multi-area OSPF in home lab VyOS topology; stub areas, summarization, redistribution; CCNP ENARSI study |
No large-scale OSPF tuning — no 500+ router network, no MPLS/LDP integration |
|
Routing Fundamentals |
Advanced |
Policy-based routing on VyOS; static routing, floating statics, route maps; CCNP-level understanding of administrative distance, redistribution, route filtering |
No segment routing, no SR-MPLS, no SRv6 |