1.1 Troubleshoot administrative distance (all routing protocols)
1.2 Troubleshoot route map for any routing protocol (attributes, tagging, filtering)
1.3 Troubleshoot loop prevention mechanisms (filtering, tagging, split horizon, route poisoning)
1.4 Troubleshoot redistribution between any routing protocols or routing sources
1.5 Troubleshoot manual and auto-summarization with any routing protocol
1.6 Configure and verify policy-based routing
1.7 Configure and verify VRF-Lite
1.8 Describe Bidirectional Forwarding Detection
1.9 Troubleshoot EIGRP (classic and named mode)
1.9.a Address families (IPv4, IPv6)
1.9.b Neighbor relationship and authentication
1.9.c Loop-free path selections (RD, FD, FC, successor, feasible successor, stuck in active)
1.9.d Stubs
1.9.e Load balancing (equal and unequal cost)
1.9.f Metrics
1.10 Troubleshoot OSPF
1.10.a Address families (IPv4, IPv6)
1.10.b Neighbor relationship and authentication
1.10.c Network types, area types, and router types
1.10.c (i) Point-to-point, multipoint, broadcast, nonbroadcast
1.10.c (ii) Area type: backbone, normal, transit, stub, NSSA, totally stub
1.10.c (iii) Internal router, backbone router, ABR, ASBR
1.10.c (iv) Virtual link
1.10.d Path preference
1.11 Troubleshoot BGP (Internal and External)
1.11.a Address families (IPv4, IPv6)
1.11.b Neighbor relationship and authentication (next-hop, mulithop, 4-byte AS, private AS, route refresh, synchronization, operation, peer group, states and timers)
1.11.c Path preference (attributes and best-path)
1.11.d Route reflector (excluding multiple route reflectors, confederations, dynamic peer)
1.11.e Policies (inbound/outbound filtering, path manipulation)