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From the author of 2.0 Layer3 Technologies 40%

2.0 Layer3 Technologies 40%

2.1 Addressing technologies

  • 2.1.a Identify, implement, and troubleshoot IPv4 addressing and subnetting
    • 2.1.a [i] Address types, VLSM
    • 2.1.a [ii] ARP
  • 2.1.b Identify, implement, and troubleshoot IPv6 addressing and subnetting
    • 2.1.b [i] Unicast, multicast
    • 2.1.b [ii] EUI-64
    • 2.1.b [iii] ND, RS/RA
    • 2.1.b [iv] Autoconfig/SLAAC temporary addresses [RFC4941]
    • 2.1.b [v] Global prefix configuration feature

2.2 Layer 3 Multicast

  • 2.2.a Troubleshoot reverse path forwarding
    • 2.2.a [i] RPF failure
    • 2.2.a[ii] RPF failure with tunnel interface
  • 2.2.b Implement and troubleshoot IPv4 protocol-independent multicast
    • 2.2.b [i] PIM dense mode, sparse mode, sparse-dense mode
    • 2.2.b [ii] Static RP, auto-RP, BSR
    • 2.2.b [iii] Bidirectional PIM
    • 2.2.b [iv] Source-specific multicast
    • 2.2.b [v] Group to RP mapping
    • 2.2.b [vi] Multicast boundary
  • 2.2.c Implement and troubleshoot multicast source discovery protocol
    • 2.2.c.[i] Intradomain MSDP [anycast RP]
    • 2.2.c.[ii] SA filter

2.3 Fundamental routing concepts

  • 2.3.a Implement and troubleshoot static routing
  • 2.3.b Implement and troubleshoot default routing
  • 2.3.c Compare routing protocol types
    • 2.3.c [i] Distance vector
    • 2.3.c [ii] Link state
    • 2.3.c [iii] Path vector
  • 2.3.d Implement, optimize, and troubleshoot administrative distance
  • 2.3.e Implement and troubleshoot passive interface
  • 2.3.f Implement and troubleshoot VRF lite
  • 2.3.g Implement, optimize, and troubleshoot filtering with any routing protocol
  • 2.3.h Implement, optimize, and troubleshoot redistribution between any routing protocol
  • 2.3.i Implement, optimize, and troubleshoot manual and autosummarization with any routing protocol
  • 2.3.j Implement, optimize, and troubleshoot policy-based routing
  • 2.3.k Identify and troubleshoot suboptimal routing
  • 2.3.l Implement and troubleshoot bidirectional forwarding detection
  • 2.3.m Implement and troubleshoot loop prevention mechanisms
    • 2.3.m [i] Route tagging, filtering
    • 2.3.m [ii] Split horizon
    • 2.3.m [iii] Route poisoning
  • 2.3.n Implement and troubleshoot routing protocol authentication
    • 2.3.n [i] MD5
    • 2.3.n [ii] key-chain
    • 2.3.n [iii] EIGRP HMAC SHA2-256bit
    • 2.3.n [iv] OSPFv2 SHA1-196bit
    • 2.3.n [v] OSPFv3 IPsec authentication

2.4 RIP v2

  • 2.4.a Implement and troubleshoot RIPv2

2.5 EIGRP [for IPv4 and IPv6]

  • 2.5.a Describe packet types
      • 2.5.a [i] Packet types (hello, query, update, and such)
      • 2.5.a [ii] Route types (internal, external)
  • 2.5.b Implement and troubleshoot neighbor relationship
    • 2.5.b [i] Multicast, unicast EIGRP peering
  • 2.5.c Implement and troubleshoot loop-free path selection
    • 2.5.c [i] RD, FD, FC, successor, feasible successor
    • 2.5.c [ii] Classic metric
    • 2.5.c [iii] Wide metric
  • 2.5.d Implement and troubleshoot operations
    • 2.5.d [i] General operations
    • 2.5.d [ii] Topology table, update, query, active, passive
    • 2.5.d [iii] Stuck in active
    • 2.5.d [iv] Graceful shutdown
  • 2.5.e Implement and troubleshoot EIGRP stub
    • 2.5.e [i] stub
    • 2.5.e [ii] leak-map
  • 2.5.f Implement and troubleshoot load-balancing
    • 2.5.f [i] equal-cost
    • 2.5.f [ii] unequal-cost
    • 2.5.f [iii] add-path
  • 2.5.g Implement EIGRP [multi-address] named mode
    • 2.5.g [i] Types of families
    • 2.5.g [ii] IPv4 address family
    • 2.5.g [iii] IPv6 address family
  • 2.5.h Implement, troubleshoot, and optimize EIGRP convergence and scalability
    • 2.5.h [i] Describe fast convergence requirements
    • 2.5.h [ii] Control query boundaries
    • 2.5.h [iii] IP FRR/fast reroute (single hop)
    • 2.5.h [iv] Summary leak-map
    • 2.5.h [v] Summary metric

2.6 OSPF [v2 and v3]

  • 2.6.a Describe packet types
    • 2.6.a [i] LSA types (1, 2, 3, 4, 5, 7, 9)
    • 2.6.a [ii] Route types (N1, N2, E1, E2)
  • 2.6.b Implement and troubleshoot neighbor relationship
  • 2.6.c Implement and troubleshoot OSPFv3 address-family support
    • 2.6.c [i] IPv4 address family
    • 2.6.c [ii] IPv6 address family
  • 2.6.d Implement and troubleshoot network types, area types, and router types
    • 2.6.d [i] Point-to-point, multipoint, broadcast, nonbroadcast
    • 2.6.d [ii] LSA types, area types: backbone, normal, transit, stub, NSSA, totally stub
    • 2.6.d [iii] Internal router, ABR, ASBR
    • 2.6.d [iv] Virtual link
  • 2.6.e Implement and troubleshoot path preference
  • 2.6.f Implement and troubleshoot operations
    • 2.6.f [i] General operations
    • 2.6.f [ii] Graceful shutdown
    • 2.6.f [iii] GTSM (generic TTL security mechanism)
  • 2.6.g Implement, troubleshoot, and optimize OSPF convergence and scalability
    • 2.6.g [i] Metrics
    • 2.6.g [ii] LSA throttling, SPF tuning, fast hello
    • 2.6.g [iii] LSA propagation control (area types, ISPF)
    • 2.6.g [iv] IP FR/fast reroute (single hop)
    • 2.6.g [v] LFA/loop-free alternative (multihop)
    • 2.6.g [vi] OSPFv3 prefix suppression

2.7 BGP

  • 2.7.a Describe, implement, and troubleshoot peer relationships
    • 2.7.a [i] Peer-group, template
    • 2.7.a [ii] Active, passive
    • 2.7.a [iii] States, timers
    • 2.7.a [iv] Dynamic neighbors
  • 2.7.b Implement and troubleshoot IBGP and EBGP
    • 2.7.b [i] EBGP, IBGP
    • 2.7.b [ii] 4 bytes AS number
    • 2.7.b [iii] Private AS
  • 2.7.c Explain attributes and best-path selection
  • 2.7.d Implement, optimize, and troubleshoot routing policies
    • 2.7.d [i] Attribute manipulation
    • 2.7.d [ii] Conditional advertisement
    • 2.7.d [iii] Outbound route filtering
    • 2.7.d [iv] Communities, extended communities
    • 2.7.d [v] Multihoming
  • 2.7.e Implement and troubleshoot scalability
    • 2.7.e [i] Route-reflector, cluster
    • 2.7.e [ii] Confederations
    • 2.7.e [iii] Aggregation, AS set
  • 2.7.f Implement and troubleshoot multiprotocol BGP
    • 2.7.f [i] IPv4, IPv6, VPN address family
  • 2.7.g Implement and troubleshoot AS path manipulations
    • 2.7.g [i] Local AS, allow AS in, remove private AS
    • 2.7.g [ii] Prepend
    • 2.7.g [iii] Regexp
  • 2.7.h Implement and troubleshoot other features
    • 2.7.h [i] Multipath
    • 2.7.h [ii] BGP synchronization
    • 2.7.h [iii] Soft reconfiguration, route refresh

2.8 Troubleshooting Layer 3 technologies

  • 2.8.a Use IOS troubleshooting tools
    • 2.8.a [i] debug, conditional debug
    • 2.8.a [ii] ping, traceroute with extended options
    • 2.8.a [iii] Embedded packet capture
  • 2.8.b Apply troubleshooting methodologies
    • 2.8.b [i] Diagnose the root cause of networking issue (analyze symptoms, identify and describe root cause)
    • 2.8.b [ii] Design and implement valid solutions according to constraints
    • 2.8.b [iii] Verify and monitor resolution
  • 2.8.c Interpret packet capture
    • 2.8.c [i] Using wireshark trace analyzer
    • 2.8.c [ii] Using IOS embedded packet capture
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