Rick Donato

Introduction In the previous part of this 3 part series, we looked at HSRP. Today we will look at VRRP, its features and how to configure it within Cisco IOS. VRRP vs HSRP VRRP is extremely similar to HSRP. However, unlike HSRP, VRRP is not Cisco proprietary. Let us look

Introduction Within this 3 part series we will be looking at 3 types of FHRP (First Hop Redundancy Protocol) on Cisco IOS - HSRP, VRRP and GLBP. We will look into the features that they each provide and also how to configure them. We will begin by exploring HSRP. So first

Introduction Within this article, we will look at equal cost and unequal cost traffic distribution in EIGRP. Note: This article is written based upon Cisco IOS 15.x. ECMP - Equal Cost Out of the box, EIGRP provides ECMP, which can also be configured via the maximum-path command. Via the

Introduction Within this article we will look at a Cisco feature called EIGRP named mode. As this involves IPv6 we will also provide an overview of IPv6 in EIGRP, whilst also providing a configuration example. The Problem Though EIGRP supports both IPv4 and IPv6, the configuration methods for both differ.

Introduction In order for OSPF-enabled routers to exchange information, they must form an adjacency (relationship) with their neighbor. Within this article, we will look at the process and various steps involved. Relationship Requirements Before the OSPF router even starts to try and form an adjacency, OSPF must know/determine

Introduction The controller cluster in the NSX platform is the control plane component responsible for managing the hypervisor switching and routing modules. This includes the logical switches and VXLAN overlay. Due to the centralized, decoupled model of the controller, it provides the ability to reduce broadcast traffic, in turn negating

Overlay networks decouple the network services from the underlying physical network infrastructure. This is achieved by running a virtual network onto of the underlay via the use of network encapsulation. There are 2 main types of overlay solutions - Network-Centric and Host-Centric Overlays. Network-Centric With Network-Centric overlays,

Introduction In the world of virtualization and connectivity, the virtual switch is one of the most fundamental components, providing networking connectivity between virtual machines, along with connecting them to the physical world. VMware provides 3 types of virtual switch, the virtual Standard Switch (vSS), the virtual Distributed Switch (vDS), and

When BUM (Broadcast, Unknown unicast and Multicast) traffic is sent out from a VM, the source VTEP must replicate this traffic out to the other VTEPs via VXLAN encapsulation. NSX provides 3 modes of replication - Multicast, Unicast and Hybrid. Multicast Multicast replication utilizes L2 (IGMP) and L3 (PIM) multicast forwarding