It is well known that VXLAN supports bridging frames, that is, forwarding frames that belong to the same L2 segment. In the beginning, this is all that was supported. There was no VXLAN routing. In essence, the HW didn’t support
EVPN Terminology
Reading RFCs is a great source of information for understanding all the details of a protocol. Often they do require the reader to be quite technical and the terminology can be confusing if you aren’t used to the type of
Bridging Packet Walk In VXLAN/EVPN Network
In this post I walk you through all the steps and packets involved in two hosts communicating over a L2 VNI in a VXLAN/EVPN network. The topology below is the one we will be using: The lab has the following
NX-OS Forwarding Constructs For VXLAN/EVPN
In this post we will look at the forwarding constructs in NX-OS in the context of VXLAN and EVPN. Having knowledge of the forwarding constructs helps both with understanding of the protocols, but also to assist in troubleshooting. BRKDCN-3040 from
EVPN Route Type 5
In a previous post, EVPN Deepdive Route Types 2 and 3, I covered route types 2 and 3. In this post I’ll cover route type 5 which is used for advertising IP prefixes. This route type is covered in RFC
VXLAN/EVPN – Host routing
In an previous post Advertising IPs In EVPN Route Type 2, I described use cases for advertising IP addresses in EVPN route type 2. Host ARP and host mobility I already covered so today we will focus on host routing.
VXLAN/EVPN – Host mobility
In the previous post VXLAN/EVPN – Host ARP, I talked about how knowing the MAC/IP of endpoints allows for ARP suppression. In this post we’ll take a look at host mobility. The topology used is the same as in the
VXLAN/EVPN – Host ARP
In the last post Advertising IPs In EVPN Route Type 2, I described how to get IPs advertised in EVPN route type 2, but why do we need it? There are three main scenarios where having the MAC/IP mapping is
Advertising IPs In EVPN Route Type 2
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