CCIE

Almost every mid-to-large enterprise WAN ends up running both MPLS and DMVPN. Not because someone planned it that

Every DMVPN carries IPsec, and every IPsec deployment sits on one of two key-exchange protocols: IKEv1, the original from

Everyone builds a second DMVPN hub for redundancy. Far fewer people test that the failover actually works - and the ones

BGP is the most powerful choice for the PE-CE protocol in an MPLS L3VPN - it scales, it carries policy,

You have an IPv4 MPLS L3VPN running. Your customers each have their own VRF, their own routing table, their own

Layer 2 problems have a special quality: the switches all say everything is fine, and yet nothing works. There is