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.
BGP communities let you attach policy metadata to routes across your entire network. This guide covers standard, extended, and large communities on Cisco IOS-XE — with real CLI examples for tagging, filtering, RTBH blackholing, and a complete dual-homed enterprise policy configuration.
A complete guide to DMVPN Phase 2 on Cisco IOS-XE: configure mGRE tunnels, NHRP registration, EIGRP with split-horizon disabled, and IPsec encryption. Includes troubleshooting commands and a final verification checklist.
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.
A step-by-step guide to configuring MPLS L3VPN on Cisco IOS-XE — covering LDP setup, VRF definitions, MP-BGP VPNv4, CE-PE routing, and verification with real show command output.
BGP communities let you carry policy intent alongside your routes — tag once, match everywhere. This guide covers community configuration, route filtering with prefix-lists and AS-path filters, remotely triggered blackholing (RTBH), large communities, and production best practices with real IOS-XE CLI examples.
STP and RSTP on Cisco IOS-XE explained in depth — root bridge placement, PortFast, BPDU Guard, Root Guard, Loop Guard, and a step-by-step troubleshooting workflow with real CLI command output.
Most enterprise networks still run dual-stack at best in 2026. This guide covers full IPv6 deployment on Cisco IOS-XE: addressing, OSPFv3, DHCPv6, ACLs, BGP, and the verification commands that actually tell you what’s broken — with real CLI output and production gotchas.
DMVPN Phase 2 enables direct spoke-to-spoke tunnels on demand, bypassing the hub after the initial NHRP resolution. This complete IOS-XE guide covers mGRE tunnel setup, NHRP configuration, EIGRP next-hop-self pitfalls, IPsec with IKEv2, verification commands, and the most common deployment gotchas.
A practical guide to diagnosing and fixing the most common OSPF adjacency failures on Cisco IOS-XE — MTU mismatches, timer conflicts, authentication errors, duplicate Router IDs, and flapping neighbors — with real show command output and CLI fixes.
