A production-grade guide to configuring SNMPv3 with SHA-256 and AES-128 on Cisco IOS-XE, including ifIndex persistence, integration with Grafana via Prometheus SNMP Exporter, LibreNMS setup, and the common gotchas that break monitoring in production.
A step-by-step IOS-XE guide covering IPv6 unicast routing, SLAAC, stateful and stateless DHCPv6, prefix delegation, OSPFv3 with address-family, ND security (RA Guard, ND Inspection), IPv6 ACLs, and essential troubleshooting commands with real show output.
Master Wireshark display and capture filters for Cisco IOS-XE environments. Learn how to use Embedded Packet Capture (EPC) on your router and apply targeted filters for STP, OSPF, BGP, DHCP, DNS, TCP, QoS, and VoIP troubleshooting.
A deep dive into Spanning Tree Protocol on Cisco IOS-XE: how STP and RSTP work, how to configure Root Bridge priority, PortFast, BPDUGuard, Root Guard, Loop Guard, and UDLD, and how to troubleshoot the most common STP failure scenarios in production networks.
A complete hands-on guide to configuring MPLS L3VPN on Cisco IOS-XE — VRFs, LDP, MP-BGP with VPNv4, PE-CE BGP, route distinguishers, route targets, label verification, and production troubleshooting tips with real IOS-XE CLI output.
A deep-dive guide to BGP communities — standard, extended, and large — plus prefix-lists, AS-path filters, and route-maps on Cisco IOS-XE. Includes real CLI examples, show command output, and a production checklist for network engineers.
Configure SNMPv3 with authPriv on Cisco IOS-XE, set up LibreNMS for auto-discovery, and build Grafana dashboards for interface utilization, BGP neighbor states, and CPU monitoring. Complete CLI guide with real IOS-XE show command output.
A practical deep dive into Spanning Tree Protocol and RSTP on Cisco IOS-XE. Covers root bridge election, PortFast, BPDU Guard, Root Guard, Loop Guard, Bridge Assurance, TCN storm troubleshooting, and Catalyst 9000 gotchas with real show command output.
A complete hands-on guide to configuring MPLS L3VPN on Cisco IOS-XE — from LDP label distribution and VRF definitions to BGP VPNv4 peering, PE-CE routing options, and VRF route leaking, with real CLI examples and show command output throughout.
A practical engineer’s guide to deploying IPv6 on Cisco IOS-XE: configure global unicast addressing, OSPFv3 routing, dual-stack interfaces, DHCPv6, named ACLs, and NDP — with real CLI output at every step.
A complete guide to DMVPN Phase 2 on Cisco IOS-XE: configure mGRE tunnels, IKEv2 IPsec, NHRP registration, OSPF next-hop preservation, and troubleshoot the most common failure modes including NAT traversal and dual-hub redundancy.
Master Wireshark for Cisco network troubleshooting. Covers BPF capture filters vs. display filters, Embedded Packet Capture (EPC) on IOS-XE, SPAN configuration, and real-world scenarios for BGP, OSPF, STP, and security anomaly analysis with actual IOS-XE CLI commands.
