Cisco MPLS VPN

In this post we will cover MPLS VPN using the following digram. We have a customer with 2 different sites. We need to creat an MPLS VPN so that site A and site B can share routes. We will be using EIGRP between the 2 sites and between the CE and PE. We will be… Read More »

Basic BGP for JunOS pt2

For this post we will be using the following network diagram. Our objective for this post is to be able to get from JUNOS2 to R1. For this post we will be focusing on the router JUNOS1 for most of the configuration. To begin with we need to set up the interface ip address on… Read More »

BGP Route Reflector

In this post I will explane BGP route reflectors. We will be using the following network digram for this post. Just like all routing protocols BGP has its own loop prevention mechanism. One of these mechanisms is the split horizon rule. The Split horizon rule for routing protocols is “don’t send updates back on the… Read More »

Commands of the day

First how to check if somone is loged in to a remote computer in your domain wmic /node:<computer name> computersystem get username To disable the network card or enable it netsh interface set interface “local area connection” disabled netsh interface set interface “local area connection” enable To add a user admin with the password of… Read More »

Site To Site VPN

In this post I will explain how to set up a site to site VPN on Cisco routers. First of all we need our network setup like this. Once we have set up the network we need to assign IP address according to the dirgram.  The next part will be to set up the VPN.… Read More »

OSPF Virtual Link

In OSPF everything has to connect to the backbone area with is area 0. So if we had a situation where we had 3 areas, area 0, area 1 and area 2 and area 2 was connected to area 1 and not directly connected to area 0 then we would have a problem. This is… Read More »

Basic BGP for JunOS

This is how to set up BGP on Juniper. We will setup BGP using the following Diagram. First we need to set the interface IP address. [edit] root# edit interfaces em0 [edit interfaces em0] root# edit unit 0 [edit interfaces em0 unit 0] root# edit family inet [edit interfaces em0 unit 0 family inet] root#… Read More »

Basic BGP setup on Cisco

To begin with we need to set up the below network. We need to configure the IP addressing for all routers. Now we have setup the network we need to configure the iBGP neighbour relationship between R1 and R2. iBGP (internal BGP) is a type of BGP that is used between routers in the same… Read More »

Cisco DNS Server

For this example our network digram is as follows. On R1 we need to set up and IP address on the interface and set up a LoopBack interface. R1> enable R1# configure terminal R1(config)# interface fastethernet 0/0 R1(config-if)# ip address 192.168.1.1 255.255.255.0 R1(config-if)# no shutdown R1(config-if)# exit R1(config)# interface loopback 1 R1(config-if)# ip address 192.168.10.1… Read More »