OSPF (Open Shortest Path First): Advanced OSPF concepts including multi-area OSPF, OSPFv3, stub areas, NSSA (Not So Stubby Area), and virtual links.
EIGRP (Enhanced Interior Gateway Routing Protocol): Advanced EIGRP concepts such as route summarization, load balancing, named EIGRP configuration, and stub routing.
BGP (Border Gateway Protocol): Implementing and troubleshooting BGP in enterprise networks, including IBGP/EBGP, route reflectors, confederations, and advanced BGP attributes and path selection processes.
Route Redistribution:
Configuring and managing route redistribution between different routing protocols.
Implementing filtering and route maps to control redistributed routes and prevent routing loops.
Routing Optimization:
Implementing and troubleshooting policy-based routing (PBR) and optimizing routing using MPLS (Multiprotocol Label Switching).
Understanding and implementing Fast Reroute (FRR) and Loop-Free Alternate (LFA) for high availability in routing.
VPN Technologies:
MPLS Layer 3 VPNs:
Understanding the concepts and implementation of MPLS Layer 3 VPNs.
Configuring and troubleshooting MPLS VPNs, including VRF (Virtual Routing and Forwarding) and route-target import/export.
DMVPN (Dynamic Multipoint VPN):
Configuring and troubleshooting DMVPN phases 1, 2, and 3.
Implementing NHRP (Next Hop Resolution Protocol) and GRE (Generic Routing Encapsulation) tunnels for dynamic VPN connectivity.
IPSec VPN:
Configuring and managing site-to-site IPSec VPNs.
Understanding and implementing FlexVPN and troubleshooting common IPSec issues.
Infrastructure Security:
Control Plane Security:
Implementing and managing control plane policing (CoPP) to protect the CPU from unnecessary or harmful traffic.
Router Security:
Implementing and managing infrastructure security features such as unicast reverse path forwarding (uRPF) and DHCP snooping.
Configuring and troubleshooting authentication, authorization, and accounting (AAA) on Cisco devices using TACACS+ and RADIUS.
Secure Routing:
Implementing and troubleshooting routing protocol authentication, such as OSPF, EIGRP, and BGP MD5 authentication.
Infrastructure Services:
Network Address Translation (NAT):
Configuring and troubleshooting NAT, including static, dynamic, PAT (Port Address Translation), and NAT64 for IPv6 transition.
QoS (Quality of Service):
Implementing advanced QoS policies, including traffic shaping, policing, and queuing mechanisms.
Understanding and applying QoS marking, classification, and congestion management techniques.
Network Management:
Implementing and managing SNMP (Simple Network Management Protocol), Syslog, and NetFlow for network monitoring and analysis.
Configuring and troubleshooting Cisco IOS Embedded Event Manager (EEM) for automated event detection and action.
Troubleshooting:
Layer 3 Troubleshooting:
Troubleshooting complex Layer 3 issues related to OSPF, EIGRP, BGP, and routing redistribution.
Identifying and resolving issues in MPLS Layer 3 VPNs, DMVPN, and IPSec VPNs.
Infrastructure Services Troubleshooting:
Troubleshooting NAT, QoS, and network management protocols.
Diagnosing and resolving infrastructure security issues.
