Tag Archives: Cisco

CCNP ROUTE Study – EIGRP Passive Interfaces

We know that enabling EIGRP on an interface has two effects: EIGRP Hello packets will start being sent out of the interface to multicast  address 224.0.0.10.  This means that neighbour relationships (adjacencies) can be formed with other routers directly connected to the same subnet and using the same EIGRP AS number the network that the […]

Reset a Cisco 2960 Switch To Factory Default Settings

Flattening a switch before re-deployment is one of those simple tasks that I always find myself having lookup on the web, so I thought I’d save myself some time in future and document it here. Step 1. Connect up your console cable and power on the switch, whilst holding down the “mode” button:     […]

Adventures in VOIP (or how to make Avaya phones & Cisco switches play nicely)

  I’m currently working on an Avaya VOIP implementation, and thought I’d blog about some of the configuration steps involved along the way. First of all let’s set the scene with a massively oversimplified network diagram that shows how things hook together.  We have a DHCP server and an Avaya CS1000E Communications Server, a Cisco […]

CCNP ROUTE Studies – IP Routing Basics

  Before getting into the detail of the various Routing Protocols, lets go over some of the fundamental concepts and principles of IP Routing, starting with an explanation of Distance Vector routing protocols…..   Distance Vector Routing Protocols examples: RIP, IGRP, EIGRP a router using a DV protocol knows 2 things: Distance to final destination Vector […]