Hey,

We just published a detailed guide on DMVPN Phase 2 configuration on Cisco IOS-XE — one of those technologies that looks straightforward but has several specific gotchas that will silently break spoke-to-spoke connectivity.

This guide covers:

• Hub and spoke mGRE + NHRP configuration from scratch
• IKEv2 + IPsec in transport mode for DMVPN
• EIGRP tuning: split horizon, next-hop-self, and hello/hold timers
• OSPF point-to-multipoint as an alternative
• Real debug output and a step-by-step troubleshooting checklist
• Production hardening: DPD, NHRP cache limits, dual-hub redundancy

Read the full guide on ignaonline.com

— Sarah Chen