Troubleshoot administrative distance (all routing protocols)
Troubleshoot route map for any routing protocol (attributes, tagging, filtering)
Troubleshoot loop prevention mechanisms (filtering, tagging, split horizon, route
poisoning)
Troubleshoot redistribution between any routing protocols or routing sources
Troubleshoot manual and auto-summarization with any routing protocol
Configure and verify policy-based routing
Configure and verify VRF-Lite
Describe Bidirectional Forwarding Detection
Troubleshoot EIGRP (classic and named mode; VRF and global)
Address families (IPv4, IPv6)
Neighbor relationship and authentication
Loop-free path selections (RD, FD, FC, successor, feasible successor, stuck in
active)
Stubs
Load balancing (equal and unequal cost)
Metrics
Troubleshoot OSPF (v2/v3)
Address families (IPv4, IPv6)
Neighbor relationship and authentication
Network types, area types, and router types
Point-to-point, multipoint, broadcast, nonbroadcast
Area type: backbone, normal, transit, stub, NSSA, totally stub
Internal router, backbone router, ABR, ASBR
Virtual link
Path preference
Troubleshoot BGP (Internal and External, unicast, and VRF-Lite)
Address families (IPv4, IPv6)
Neighbor relationship and authentication (next-hop, mulithop, 4-byte AS,
private AS, route refresh, synchronization, operation, peer group, states and
timers)
Path preference (attributes and best-path)
Route reflector (excluding multiple route reflectors, confederations, dynamic
peer)
Policies (inbound/outbound filtering, path manipulation
