Simple PPPoE connection on Cisco Routers

Simple PPPoE connection on Cisco Routers

This is small topic about establishing PPPoE session using Cisco devices and its various IP addressing techniques. A Cisco router can act as either of PPPoE client or server. In out simple topology, we have 3 routers in which R1 is our PPPoE client and R2 is PPPoE server. While configuring PPPoE client, we need an special interface, named “dialer interface” which is virtual and will bind to physical interface f0/0 on R1. The default encapsulation of dialer interface is not PPP and we need to set it up manually. Sample configuration of…Read more …
EIGRP Named-Mode

EIGRP Named-Mode

Starting with version 15, Cisco has announced major changes to its IOS and one of them is the way of configuring the EIGRP. This method is called EIGRP named-Mode, in which you are supposed to configure EIGRP with given name, rather than an AS number in global configuration mode. Actually there is not huge difference between the configuration of the two and I think you must not have any difficulties if you are used to work with the older version. So I’m going to show you a simple scenario in which I will…Read more …
BGP Communities

BGP Communities

This is small topic about using the communities in BGP. I’m going to use the topology from previous topic, which was about “MPLS VPN”. As you remember, R1 had generated an aggregate route to R3. But customer B’s router, R2, had advertised routes to R3 as they were, without summarization. What I want to do is generating communities on R1 and R2 and test routes on other sites to see if they are there. First we need a route-map on R1 and R2 to attach communities to routes. This route-map is used with…Read more …
MPLS VPN – Part 4

MPLS VPN – Part 4

this is the second part of "MPLS VPN - Part 3" topic. in the previous post I discussed about building MPLS VPN network with BGP as PE-CE protocol and this one is the remaining portion of that document. if you want to read this guide, it is better to start with previous one. Now we have reachability from each PE router to its clients and the only remaining part is establishing full connectivity. For this, we must enable MP-BGP between R3 and R5. 84Read more …