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
Simulate a Silent Host in a VXLAN Network
I’m working on a blog post explaining route type 5 in EVPN. To demonstrate a scenario with a silent host, I want to simulate this behavior. Normally, hosts can be quite chatty and ARP for their GW, for example. In
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
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!