Response: Vendor Network Automation Tools

Drew Conry-Murray published a excellent summary of his takeaways from the AutoCon0 event, including this one:

Most companies want vendor-supported tools that will actually help them be more efficient, reduce human error, and increase the velocity at which the network team can support new apps and services.

Yeah, that’s nothing new. Most Service Providers wanted vendors to add tons of nerd knobs to their products to adapt them to existing network designs. Obviously, it must be done for free because a vast purchase order¹ is dangling in the air. We’ve seen how well that worked, yet learned nothing from that experience.

Worth Reading: Network CI and Open Source

Did you find the Network Automation with GitHub Actions blog post interesting? Here are some more GitHub Self-Hosted Runner goodies from Julio Perez: Network CI and Open Source – Welcome to the World of Tomorrow. Enjoy!

Worth Reading: Network CI and Open Source

Did you find the Network Automation with GitHub Actions blog post interesting? Here are some more GitHub Self-Hosted Runner goodies from Julio Perez: Network CI and Open Source – Welcome to the World of Tomorrow. Enjoy!

Worth Exploring: SRv6 Test Topologies

Want to explore SRv6? Cisco engineers put together a repository containing scripts and configs for building SRv6 test topologies. It works with Containerlab and FRR (unless you want to beg a Cisco account team for a Cisco 8000 image or make a sandwich while the IOS XRd image is booting).

Want to use netlab? Jeroen van Bemmel implemented baseline SRv6 support for Nokia SR OS.

Worth Exploring: SRv6 Test Topologies

Want to explore SRv6? Cisco engineers put together a repository containing scripts and configs for building SRv6 test topologies. It works with Containerlab and FRR (unless you want to beg a Cisco account team for a Cisco 8000 image or make a sandwich while the IOS XRd image is booting).

Want to use netlab? Jeroen van Bemmel implemented baseline SRv6 support for Nokia SR OS.

Video: netlab IP Address Management (IPAM)

Did you know that netlab includes full-blown IP address management? You can define address pools (or use predefined ones) and get IPv4 and IPv6 prefixes from those pools assigned to links, interfaces, and loopbacks. You can also assign static prefixes to links, use static IP addresses, interface addresses as an offset within the link subnet, or use unnumbered interfaces.

For an overview of netlab IPAM, watch the netlab address management video (part of the Network Automation Tools webinar), for more details read the netlab addressing tutorial.

Video: netlab IP Address Management (IPAM)

Did you know that netlab includes full-blown IP address management? You can define address pools (or use predefined ones) and get IPv4 and IPv6 prefixes from those pools assigned to links, interfaces, and loopbacks. You can also assign static prefixes to links, use static IP addresses, interface addresses as an offset within the link subnet, or use unnumbered interfaces.

For an overview of netlab IPAM, watch the netlab address management video (part of the Network Automation Tools webinar), for more details read the netlab addressing tutorial.

AMS-IX Outage: Layer-2 Strikes Again

On November 22nd, 2023, AMS-IX, one of the largest Internet exchanges in Europe, experienced a significant performance drop lasting more than four hours. While its peak performance is around 10 Tbps, it dropped to about 2.1 Tbps during the outage.

AMS-IX published a very sanitized and diplomatic post-mortem incident summary in which they explained the outage was caused by LACP leakage. That phrase should be a red flag, but let’s dig deeper into the details.

AMS-IX Outage: Layer-2 Strikes Again

On November 22nd, 2023, AMS-IX, one of the largest Internet exchanges in Europe, experienced a significant performance drop lasting more than four hours. While its peak performance is around 10 Tbps, it dropped to about 2.1 Tbps during the outage.

AMS-IX published a very sanitized and diplomatic post-mortem incident summary in which they explained the outage was caused by LACP leakage. That phrase should be a red flag, but let’s dig deeper into the details.

BGP Labs: Use BGP Route Reflectors

In the previous BGP labs, we built a network with two adjacent BGP routers and a larger transit network using IBGP. Now let’s make our transit network scalable with BGP route reflectors, this time using a slightly larger network:

BGP Labs: Use BGP Route Reflectors

In the previous BGP labs, we built a network with two adjacent BGP routers and a larger transit network using IBGP. Now let’s make our transit network scalable with BGP route reflectors, this time using a slightly larger network:

netlab 1.7.0: Lab Validation, Fabrics, BGP Nerd Knobs

It’s been a while since the last netlab release. Most of that time was spent refactoring stuff that you don’t care about, but you might like these features:

• You can run automated lab validation tests with the netlab validate command. I will explain how I use that in BGP labs in a few days.
• If you want to build large leaf-and-spine topologies, you’ll love the fabric plugin.
• The bgp.domain plugin allows you to create topologies with multiple sites using the same BGP AS number.
• The bgp.policy plugin got AS-path prepending.
• bgp.originate plugin can be used to originate BGP IPv4 and IPv6 prefixes.

As always, we also improved the platform support:

netlab 1.7.0: Lab Validation, Fabrics, BGP Nerd Knobs

It’s been a while since the last netlab release. Most of that time was spent refactoring stuff that you don’t care about, but you might like these features:

• You can run automated lab validation tests with the netlab validate command. I will explain how I use that in BGP labs in a few days.
• If you want to build large leaf-and-spine topologies, you’ll love the fabric plugin.
• The bgp.domain plugin allows you to create topologies with multiple sites using the same BGP AS number.
• The bgp.policy plugin got AS-path prepending.
• bgp.originate plugin can be used to originate BGP IPv4 and IPv6 prefixes.

As always, we also improved the platform support:

The BGP Origin Attribute

Kristijan Taskovski asked an interesting question related to my BGP AS-prepending lab:

I’ve never personally done this on the net but….wouldn’t the BGP origin code also work with moving one’s ingress traffic similarly to AS PATH?

TL&DR: Sort of, but not exactly. Also, just because you can climb up ropes using shoelaces instead of jumars doesn’t mean you should.

Let’s deal with the moving traffic bit first.

The BGP Origin Attribute

Kristijan Taskovski asked an interesting question related to my BGP AS-prepending lab:

I’ve never personally done this on the net but….wouldn’t the BGP origin code also work with moving one’s ingress traffic similarly to AS PATH?

TL&DR: Sort of, but not exactly. Also, just because you can climb up ropes using shoelaces instead of jumars doesn’t mean you should.

Let’s deal with the moving traffic bit first.

Worth Reading: DNS over IPv6

What happens when you let a bunch of people work on different aspects of a solution without them ever talking to each other? You get DNS over IPv6. As nicely explained by Geoff Huston, this is just one of the bad things that could happen:

Worth Reading: DNS over IPv6

What happens when you let a bunch of people work on different aspects of a solution without them ever talking to each other? You get DNS over IPv6. As nicely explained by Geoff Huston, this is just one of the bad things that could happen:

Worth Reading: Use of HTTPS DNS Resource Records

Around 30 years after we got the first website, the powers that be realized it might make sense to put this is how you access a web server information (including its IPv4 and IPv6 address, and HTTP(S) support information) directly into DNS, using HTTPS Resource Records. It took us long enough 🤷‍♂️

Worth Reading: Use of HTTPS DNS Resource Records

Around 30 years after we got the first website, the powers that be realized it might make sense to put this is how you access a web server information (including its IPv4 and IPv6 address, and HTTP(S) support information) directly into DNS, using HTTPS Resource Records. It took us long enough 🤷‍♂️

30 Days Left to Buy ipSpace.net Subscription

When I announced the lifetime ipSpace.net subscription in early September, I also mentioned that you won’t be able to purchase any ipSpace.net subscription after December 31st, 2023.

As of today, you have 30 days left to decide, and don’t wait till the last minute – I plan to turn off the purchasing process sometime during the business hours of December 31st as I hope to have more interesting things to do in the evening.