Archive

Category Archives for "Networking"

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.

To be able to show this scenario, I have added another server (SERVER-2) and will be using the topology below:

There is already existing configuration for VLAN 10 (L2 VNI) and for VLAN 100 (L3 VNI) which is shown below:

vrf context Tenant1
  vni 10001
  rd auto
  address-family ipv4 unicast
    route-target both auto
    route-target both auto evpn
!
interface Vlan10
  no shutdown
  vrf member Tenant1
  ip address 198.51.100.1/24
  fabric forwarding mode anycast-gateway
!
interface Vlan100
  no shutdown
  mtu 9216
  vrf member Tenant1
  ip forward

To get SERVER-2 connected the following is needed:

  • Configure VLAN 20 and map it to L2 VNI (VNI 10002).
  • Make the L2 VNI a member of the NVE.
  • SVI for VLAN 20.
  • Configure port towards SERVER-2 in VLAN 20.

This is shown below:

vlan 20
  vn-segment 10002
!
interface nve1
  member vni 10002
    ingress-replication protocol bgp
!
interface Vlan20
  no shutdown
  vrf member Tenant1
  ip address 10.0.0.1/24
  fabric forwarding mode anycast-gateway
!
interface Ethernet1/3
   Continue reading

KU045: How Yellowbrick Is Redefining Data Warehousing with Kubernetes (Sponsored)

Mark Cusack from Yellowbrick joins us to talk about all things database and data warehouse on Kubernetes. Yellowbrick is a data warehousing solution that runs 100% on Kubernetes. Mark details the company’s history, the transition from hardware to a software-only model, and the adoption of Kubernetes to improve scalability and flexibility. He addresses misconceptions about... Read more »

Painless Progress with My Ubiquiti Upgrade

I’m not a wireless engineer by trade. I don’t have a lab of access points that I’m using to test the latest and greatest solutions. I leave that to my friends. I fall more in the camp of having a working wireless network that meets my needs and keeps my family from yelling at me when the network is down.

Ubiquitous Usage

For the last five years my house has been running on Ubiquiti gear. You may recall I did a review back in 2018 after having it up and running for a few months. Since then I’ve had no issues. In fact, the only problem I had was not with the gear but with the machine I installed the controller software on. Turns out hard disk drives do eventually go bad and I needed to replace it and get everything up and running again. Which was my intention when it went down sometime in 2021. Of course, life being what it is I deprioritized the recovery of the system. I realized after more than a year that my wireless network hadn’t hiccuped once. Sure, I couldn’t make any changes to it but the joy of having a stable environment Continue reading

HS062: Questions On Being Service-Oriented

Johna and Greg discuss service-oriented networking and the challenges of defining and delivering network services. They explore the negative impact of siloed organizational structures on service delivery and the importance of continuous adaptation in infrastructure management. They debate the perception of services by users, using metaphors like sidewalks and electricity, and the importance of defining... Read more »

D2C228: Building Local Tech Communities

While it’s easy to find technical content and make professional connections online, in-person interactions are still valuable for learning, forging business and personal connections, and career development. On today’s Day Two Cloud we discuss how and why to build local tech communities. Guest Laura Santamaria is a developer, developer advocate, and longtime community builder. We... Read more »

Registration No Longer Needed to Download Free PDFs

I published dozens of free-to-download slide decks on ipSpace.net. Downloading them required the free ipSpace.net subscription which is no longer available because I refuse to play a whack-a-mole game with spammers.

You might like the workaround I had to implement to keep those PDFs accessible: they are no longer behind a regwall.

You can find the list of all the free content ipSpace.net content here. The Conferences and Presentations page is another source of links to public presentations.

Registration No Longer Needed to Download Free PDFs

I published dozens of free-to-download slide decks on ipSpace.net. Downloading them required the free ipSpace.net subscription which is no longer available because I refuse to play a whack-a-mole game with spammers.

You might like the workaround I had to implement to keep those PDFs accessible: they are no longer behind a regwall.

You can find the list of all the free content ipSpace.net content here. The Conferences and Presentations page is another source of links to public presentations.

HW018: Building a Successful Wi-Fi Consulting Business

Wi-Fi consultant Rowell Dionicio shares his experiences and insights on building a successful consulting practice. He discusses the importance of niche specialization, creating educational content, and using his podcast and blog as marketing tools. Rowell highlights the need for continuous learning, effective communication, and networking. He also addresses the business side of consulting, including handling... Read more »

Making Networking Cool Again? (1)

Is network engineering still cool?

It certainly doesn’t seem like it, does it? College admissions seem to be down in the network engineering programs I know of, and networking certifications seem to be down, too. Maybe we’ve just passed the top of the curve, and computer networking skills are just going the way of coopering. Let’s see if we can sort out the nature of this malaise and possible solutions. Fair warning—this is going to take more than one post.

Let’s start here: It could be that computer networking is a solved problem, and we just don’t need network engineers any longer.

I’ve certainly heard people say these kinds of things—for instance, one rather well-known network engineer said, just a few years back, that network engineers would no longer be needed in five years. According to this view, the entire network should be like a car. You get in, turn the key, and it “just works.” There shouldn’t be any excitement or concern about a commodity like transporting packets. Another illustration I’ve heard used is “network bandwidth should just be like computer memory—if you need more, add it.”

Does this really hold, though? Even if we accept the Continue reading

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