Nokia BGP Fundamentals for Services study guide
Nokia BGP Fundamentals for Services · Work through your exam, one topic at a time.
BGP Fundamentals for Services is a Nokia certification-style exam aimed at network engineers who design, operate, or support service provider networks built on Nokia routers running SR OS. It sits at the foundational-to-intermediate level: you are expected to understand how BGP actually behaves in a provider environment, not just how to type a neighbor statement. The Nokia BGP Fundamentals for Services study guide has 8 sections and about 3,383 words.
01BGP Fundamentals and Protocol Operation
This domain tests whether you know exactly what BGP puts on the wire and how a Nokia SR OS router turns a received UPDATE into a BGP RIB entry and then into a best path. BGP-4 (RFC 4271) runs over TCP port 179 and is incremental: a prefix is advertised once and stays valid until withdrawn or the session drops.
409 words, about 2 min02BGP Sessions, Peering Types, and Transport
This domain covers how the TCP session is built and protected, and how the peering type (eBGP transit/customer/peer, iBGP internal) changes transport rules and attribute handling. TCP 179, one session per peer, sourced from an address you choose with local-address (typically the system/loopback interface).
409 words, about 2 min03BGP Path Selection and Best-Path Decision
This domain tests the decision steps that turn several candidate paths into one installed route, and the SR OS knobs that modify those steps. Only paths with a resolvable NEXT HOP are candidates.
404 words, about 2 min04Route Advertisement, Filtering, and Policy
This domain tests what a router is allowed to originate or re-advertise, and how SR OS policy statements filter and modify it in both directions. network statements originate a prefix only when an exact-match route exists in the route table.
401 words, about 2 min05Scaling: Route Reflectors, Confederations, and Peer Groups
This domain tests how you scale iBGP beyond a full mesh and how SR OS implements route reflection, confederations and group-based configuration. iBGP full mesh requires n(n-1)/2 sessions and, worse, each router stores every path.
451 words, about 2 min06Multiprotocol BGP and Address Families (IPv6, VPN, EVPN)
This domain tests AFI/SAFI negotiation and the per-family behaviour of next hops, route targets and NLRI encoding. Families are advertised as capabilities in OPEN.
419 words, about 2 min07BGP Convergence, Timers, and Stability Mechanisms
This domain tests how fast a failure is detected and propagated, and how you stop unstable peers from destabilising the router. SR OS defaults: hold time 90 s, keepalive 30 s (one third of hold), connect-retry 120 s, min-route-advertisement 30 s.
466 words, about 2 min08Service Provider BGP Design and Troubleshooting
This domain tests the design decisions that make a provider network predictable and the ordered method for finding why a session or prefix is broken. Separate route reflectors per address family or service, placed in the core, with clients only on PEs.
424 words, about 2 min