In this post we will look at what happens to the TTL value of a packet when it enters the MPLS VPN. We will also see how we can change that behavior to hide the provider network from customers.
R4(CE)—R5(PE)—R9(P)—R8(P)—R6(PE)
R4 is a CE router communicating with a VRF on R6.
R6 is a PE but has a loopback in the VRF.
Hi IPexpert blog readers!!!
Well as some of you know I am starting a new CCIE quest. I am going to study for CCIE voice.
In this “Iwan is going for quad” blog series I am going to give you a weekly update of all my adventures regarding the CCIE Voice study.
This will be about my successes but also my failures, the stuff that I found boring and the stuff that I found fun to do.
I will explain you what my approach is and will discuss the progress. For our new students this is the opportunity to see how I am building up the knowledge from scratch until I passed the lab exam. Read the rest of this entry »
Congratulations to:
In this post, we look at how MPLS and LDP are used to build an LSP between two BGP speaking routers. The routers will share IBGP routes with each other, however they will not share BGP routes with an intermediate router nor will they redistribute BGP routes into the IGP. Labels are used to forward packets the proper next-hop. For those familiar with MPLS VPN already, this works very similarly however we have no VRFs. Read the rest of this entry »
I’m pleased to announce the addition of Elizabeth Stewart and Dan Aguilera to the IPexpert team. Elizabeth and Dan both come from a competitive player in the Associate and Professional Level Cisco training space and will be key individuals involved in assisting the current management, sales and technical team in the rollout of IPexpert’s upcoming CCNA (R&S, Security and Voice), CCNP, CCVP and CCSP technical classes and products, which will be announced this month. Read the rest of this entry »
First let me introduce myself, My name is Talmadge Almand, I am a CCIE Voice #20901, thanks in part to the great experience of IPexpert and their sister company, Proctor Labs.
For this my first blog as a Voice OSL, I would like to give some history as to my training and experience; I have 20 years of voice experience with a world class service provider, in that time, I have attained numerous certifications in the DATA field primarily with Cisco and of course moved from the traditional telephony world to VOIP, I have been working with Cisco Voip for nearly 10 years with the same service provider. Read the rest of this entry »
IPexpert Blog Followers,
I’m pleased to announce that Amy Ryan (CCIE #24677 / Voice, CCVP, CCNP, CCSP, CCIP, CCDP, Microsoft MCSE, PMP) is now part of the industry-renowned group of instructors at IPexpert! Read the rest of this entry »
Welcome back everybody! Today we will be continuing our discussion on some of the internals of OSPF Type-4 LSAs and the forwarding-address. We will also be discussing an interesting feature known as forward-address suppression and see how it can actually dramatically change the flow of our traffic in OSPF. The diagram we will be working on is similar to the one used for part 1 of this blog, but modified to make it a bit more…interesting? Read the rest of this entry »
I’d like to congratulate Bryan Bartik – many of you have been reading his blogs and receiving support from him on our email support list for several months now! Bryan passed his second lab yesterday, the CCIE SP lab! Congrats on a job well done, Bryan! – Wayne
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