OSPF - INTRODUCTION

Introduction to Link State protocols and how they compare with distance vector, general overview on the OSPF routing protocol, its performance, metric and the mechanisms that allows OSPF to scale

OSPF - ROUTER ID

In this video we analyze the function of the router-id in OSPF, why is a key element in the SPF calculations, its role on the LSA advertisements and what may happen if we found the same router-id on two devices not directly connected

OSPF - INTRODUCTION TO AREAS

In this video we the function of the areas, how the protocol behaves when dealing with multiple areas, and a high level overview on how the protocol advertises information between areas

OSPF - ROUTER CLASSIFICATION

In this session we define what are the: Internal Routers, Area Border Routers (ABR), Backbone Routers and AS Boundary Routers (ASBR)

OSPF - ADJACENCY ESTABLISHMENT

Description of how OSPF adjacencies are formed, the OSPF FSM, analysis on the parameters that must match or be equal for two devices to reach the FULL state

OSPF - BEHAVIOUR ON MULTIACCESS SEGMENTS

Introduction to OSPF behavior in multi-access segments. We will provide an overview on how the DR/BDR work and why OSPF uses this kind of mechanisms

OSPF - INTRODUCTION TO LSA

Function, structure and types of LSA used by OSPF for the exchange of information

OSPF - CISCO BASIC CONFIGURATION

Basic OSPF Configuration in a multi area topology on Cisco IOS devices. Common verification and troubleshooting procedures

OSPF - HELLO AND DEAD INTERVALS

Operation Hello and Dead interval. How they behave in different types of networks and their influence on the formation of adjacencies.

OSPF - CISCO HELLO AND DEAD INTERVALS

Configuring Hello / Dead timer in Cisco IOS devices and how to verify and troubleshoot its operation.

OSPF - POINT-TO-POINT AND POINT-TO-MULTIPOINT NETWORK TYPES

OSPF point-to-point and point-to-multipoint Network types. How they behave, implications and default timers

OSPF - CISCO POINT-TO-POINT AND POINT-TO-MULTIPOINT

Configuration, verification and troubleshooting procedures for the OSPF network types: Point-To-Point and Point-to-Multipoint on Cisco IOS devices.

OSPF - BROADCAST AND NON-BROADCAST NETWORK TYPES

Operation of the OSPF broadcast and non-broadcast network types, selection of the DR / BDR roles and overall operation.

OSPF - CISCO BROADCAST AND NON-BROADCAST NETWORK TYPES

Configuration, verification and troubleshooting of the OSPF network types: broadcast and non-broadcast OSPF on Cisco IOS devices.

OSPF - LSA TYPE 1 AND 2

In this video we go into the operation details of the OSPF LSA 1 (router LSA) and LSA 2 (network LSA), what information they represent and contain and their impact on the general performance of the OSPF routing protocol

OSPF - LSA TYPE 3

In this session we explore in detail the operation of the Summary LSA (Type 3), what information they represent and contain, together with the details of how OSPF routers calculate the metric.

OSPF - LSA TYPE 4 AND 5

Details on how the OSPF LSA 4 (ASBR-Summary) and LSA 5 (External) operate and what information they contain. We'll take special attention into how the calculations are made to reach external routes.

OSPF - LSA TYPE 7

Operation of LSA Type 7 on NSSA areas. How translation is performed by the ABR's from a LSA Type 7 to a LSA type 5 and the calculations performed with the forward address to get the metric to any specific route

OSPF - CISCO COST MODIFICATION

In this session we will see how to modify and check the cost on Cisco IOS devices for the OSPF routing protocol (interface level and global configuration)

OSPF - BACKBONE AND REGULAR AREAS

In this session we analyze the operation of the area 0 (backbone) and regular areas, what optimization they provide and the benefit of using multiple areas

OSPF - STUB AND STUB NO SUMMARY AREAS

In this video we explore how stub and totally stub areas (stub no-summary) work, what OSPF LSA they filter and how OSPF provide connectivity to the routes that are lost with this LSA filtering

OSPF - NSSA AND NSSA NO SUMMARY AREAS

We explore in this session the operation of NSSA and totally NSSA areas (NSSA no-summary) what LSA types they filter, how Type 7 LSA are translated to Type 5 LSA and how routing is done within these areas

OSPF - CISCO STUB AREAS

In this session we configure different stub area types of OSPF (stub, totally stub, NSSA and totally NSSA). We will observe independently the behavior of each of them and their implications.

OSPF - AUTHENTICATION

In this video we go deep into the details behind the operation of the OSPF authentication, authentication types and their implications

OSPF - CISCO AUTHENTICATION

Configuration, verification and troubleshooting of OSPF authentication on Cisco IOS devices. In this video we work with all different authentication types available and how to fix any problem that may show up using this security feature

OSPF - VIRTUAL LINKS

In this session we explore the details behind the operation of virtual links, why they exist, the most common uses and the implications of using them

OSPF - CISCO VIRTUAL LINKS

Configuration, verification and troubleshooting of OSPF virtual links on Cisco IOS devices

OSPF - CISCO DEFAULT ROUTE

This video will show you how to generate a default route into OSPF on Cisco IOS devices, with three possible scenarios and configurations.

BGP - INTRODUCTION

In this video we will provide an introduction to BGP, its philosophy and operation at a very high level. We'll see concepts like the mechanics of Path vector protocols, BGP conceptual differences with IGP's and an introduction to the use of attributes for routing.

BGP - MESSAGES

In this session we explore the different messages used by BGP to establish sessions, warn of possible errors, exchange information and keep up sessions. These messages are: OPEN, NOTICE, UPDATE and KEEPALIVE.

BGP - SESSIONS AND FSM

In this video we will see how sessions are established between two endpoints running BGP. Analyze the implications of using TCP as the transport protocol and the BGP Finite State Machine.

BGP - CISCO SESSION ESTABLISHMENT

This video will show you how to setup a session between two BGP neighbors on Cisco IOS devices. You will see the different commands to check the protocol status, the TCP-level implications, and how to solve common problems and troubleshooting procedures (with corresponding debugs).

BGP - CAPABILITIES

This video will show you what are the capabilities of BGP, how they are negotiated and represented in the BGP OPEN message. We will pay special attention to one of the most important capability: Multiprotocol Extension.

BGP - ATTRIBUTES

In this session we will explore the different types of attributes that BGP uses, we will see what are the characteristics and scope of each of them, along with some examples.

BGP - AS PATH

In this video we will look at how the autonomous systems numbers are structure, the operation of the AS-Path attribute, introduction to using private autonomous system number and the numbers of 4 bytes

BGP - BEST PATH SELECTION ALGORITHM

In this video we explain the BGP decision algorithm. We will go through each of the path selection steps that the protocol takes to select which of the different paths received is the best.

BGP - AUTHENTICATION

In this video we will explore the different BGP authentication methods, concentrating on the authentication provided by the transport layer (TCP) using MD5 and its implications.

BGP - CISCO AUTHENTICATION

In this video we will explore how we can implement BGP MD5 authentication on Cisco IOS devices using the mechanism provided by TCP. Special attention is taken to the verification and troubleshooting procedures.

BGP - IBGP SESSIONS

In this video we will explore how iBGP sessions work. We will focus on the implications of these sessions in terms of next-hop, the advertisements between iBGP sessions, the AS-Path management and synchronization.

BGP - CISCO IBGP SESSIONS

In this session we will see how we can check and configure iBGP sessions on Cisco IOS devices. We will see the implications of these sessions in the management of the Next-Hop, advertisements between iBGP routers and synchronization.

BGP - EBGP SESSIONS

In this video we will explore eBGP sessions, the controls that the protocols implements for session establishment, TTL considerations and Next-Hop management.

BGP - CISCO EBGP SESSIONS

In this chapter we will explore the configuration and verification procedures for eBGP sessions on Cisco equipment. We will focus in features like ttl-security settings, ebgp-multihop and disable-connected-check.

BGP - CISCO IPV4 NLRI ADVERTISEMENTS

In this video we explore how we can create Network Layer Reachability Information of IPv4 networks. We will also see how we can modify the attributes of the advertisements with the network or redistribute commands in Cisco IOS.