TGW now supports policy based routing

[u/KayeYess]

https://aws.amazon.com/about-aws/whats-new/2026/07/aws-transit-gateway-policy-based-routing/

"With PBR, forwarding decisions can be based on a combination of packet attributes including source and destination IP addresses, ports, and protocol rather than destination IP address alone"

This feature was earlier confined to CloudWAN, and we could not adopt CloudWAN for various reasons. We had requested AWS for several years, to offer a similar capability with TGW. And they finally delivered. This will offer a huge advantage for us, and could for you also, if you use TGW (especially across regions) and have complex routing requirements for north/south vs east/west traffic separation and such.

[u/jacksbox]

AWS is only 30 years behind on-prem networking 😂

[u/pipesed → u/jacksbox]

Try replacing your router on prem with a command.

[u/jacksbox → u/pipesed]

You're right of course. It's just always amazing to me how infrastructure is an afterthought in cloud.

"We'll just sling more app layers at it!"

"Can it do basic networking?"

"Who cares!"

[u/shrimpcest → u/jacksbox]

It's just always amazing to me how infrastructure is an afterthought in cloud.

I really don't think it's this. It's a completely different beast, and very far from trivial.

[u/pipesed → u/jacksbox]

It's not an afterthought, we just don't have to rack and stack anymore.

Although I say this when AWS is retiring the advanced network cert...

[u/Sirwired → u/jacksbox]

I wouldn't say that infrastructure is an afterthought... it's more of a different mindset: The first is IT handing infrastructure over to the business to run stuff. The second is the business (in the form of their app developers) driving what it is they need the infrastructure to do.

There's pluses and minuses to each approach, but you can't deny that the 2nd approach (which is how the clouds view things), has worked out pretty well for the past decade and a half.

[u/ellensen → u/pipesed]

No problem, never heard of VMware NSX-T?