In my last post EVPN Deepdive Route Types 2 and 3, we took a deepdive into these two route types. I mentioned that the IP address of a host, a /32 or /128 address, could optionally be advertised. I also
EVPN Deepdive Route Types 2 and 3
In my last post on Configuring EVPN, we setup EVPN but configured no services. In this post we will configure a basic L2 service so we can dive into the different EVPN route types. This post will cover route type
VRF Without Route Target – Will the Route Be Exported?
Yesterday I posted a tricky question to Twitter. If you have a working VPNv4 environment and create a VRF with only a Route Distinguisher (RD) but without Route Targets (RT), will the route be exported? The answer may surprise you!
Configuring EVPN on NX-OS
In this post we will configure EVPN on NX-OS. We will reuse the VXLAN topology from my previous post. The following will describe the setup in this post: The BGP topology is shown below: I will cover all the details
Introduction to EVPN In VXLAN Networks
In previous posts I described VXLAN using flood and learn behavior using multicast or ingress replication. The drawback to flood and learn is that frames need to be flooded/replicated for the VTEPs to learn of each other and for learning
Trunk to Access – Will It Work?
Recently a posted a question to Twitter about connecting two Cisco Catalyst switches. One switch has already booted and has the following configuration: The other switch is connected to Gi1/0/48 and has just been powered on. It has no configuration
How to Interview a Network Engineer Using a Single Scenario
Most organizations are terribly bad at interviewing people. They overcomplicate things by holding too many interviews (more than 2-3) and often focus their interview on trivia and memorization rather than walking through a scenario. Every interview should have some form
SPCOR Exam Experience by Nick Russo
On 31 October 2023, I took and passed the Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) exam on my first attempt. Most of you know that I am recognized as an expert on Cisco Service Provider technologies
DCAUTO Exam Experience by Nick Russo
On 17 October 2023, I took and passed the Automating and Programming Cisco Data Center Solutions (DCAUTO) exam on my first attempt. This is the seventh DevNet exam I’ve passed. After the retirement of the Webex and IoT specialty exams,
Forwarding BUM Frames in VXLAN Network With Static Ingress Replication
In the last post we used multicast to forward BUM frames. In this post, static ingress replication is used which removes the requirement for multicast in the underlay. Before setting this up, let’s do a comparison of multicast vs ingress