PKI 102 – Digital Certificates

1. Digital Certificates One of the most important things when it comes to crytpography is authentication which is the process of verifying that an entity really is who it claims to be. In modern cryptography this is usually done through a digital certificate. A digital certificate binds an entity’s identity …

PKI 101 – Key pairs

Public Key Infrastructure, aka PKI, is a set of roles, procedures and policies used to manage digital certificates and public key encryption. …

NetFlow 102 – FNF – Flexible NetFlow

Netflow configuration is different by platform and IOS version. Initially, Cisco IOS supported what is now known as “Traditional/Original Netflow(TNF)”, but newer …

DMVPN

1. DMVPN DMVPN – Dynamic Multipoint VPN is a technology that uses IPSec, mGRE and NHRP to provide a dynamic VPN infrastructure. …

How CEF works

1. Process Switching 1.1 How it works Network interface detects a new packet on the wire. The interface will receive the packet …

MPLS L3 VPN

This article assumes the “provider” network already has an IGP in place and that the LDP is configured to advertise label bindings …

IS-IS Mechanics – CLNP

1. ISO OSI Terminology ISO OSI term TCP/IP Equivalent End System Host Intermediate System Router Circuit Interface Area Area Domain Autonomous System …

IS-IS 101

1. Starting the routing process Starting IS-IS process requires a 2 step configuration: 1. In the global config 2. On the interfaces …

Cisco Enterprise Architecture

1. Hierarchical Model Cisco Enterprise Architecture is based on a hierarchical model that consists of: Access Layer: provides connectivity without compromising network integrity …