Cisco

What is a Port-Channel? Before we dive into vPC it is important to quickly review Port-Channels. A Port-Channel is a technology that provides a way to aggregate (bond) multiple interfaces together. Traffic is then loadbalanced across each of the connections. Port-Channels provide 3 key benefits, * Redundancy - Should one of

What is VRF-Lite? VRF is a feature that allows you to create separate instances of the routing table. In turn allowing you to segregate and isolate different network types. When VRFs are used without MPLS it is classed as VRF-lite. VRF-lite configuration doesn’t need the route-target and can be

Introduction In order to reduce the amount of routing information within the routing table, routing summarization is used. Cisco IOS provides 3 types of BGP summarization: * Aggregate Address - BGP is configured to advertise an aggregate network via the aggregate-address command. * Manual - A summarized network is added to RIB

Introduction The goal of this article will be to provide you with the required steps to build a Virtual eXtensible LAN Ethernet VPN (VXLAN EVPN) fabric using the Cisco NXOS-9000v. The topology will be built using various protocols, so before we dive in let's look at the various

IOS Classical IOS is based upon a monolithic kernel. This monolithic kernel runs all of its modules within the same memory space, providing no CPU or memory separation. Therefore, in the event of a single process/module crashing, the entire system would become unresponsive. Another disadvantage is around upgrades, as

Introduction We now come to the final part of the Cisco IOS FHRP series - GLBP (Gateway Load Balancing Protocol). Again, we will look at its features and then the configuration steps required to configure it on the Cisco IOS platform. What is GLBP? GLBP is a Cisco proprietary protocol,

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