What I'd like:
I'd like to be able to configure the MTU of EC2 instances running bottlerocket.

I'm using cilium on AWS EKS with cluster mesh across multiple AWS VPCs through a Transit Gateway. Unfortunately, Transit Gateways support a max of 8500 MTU and the EKS optimized AMIs use jumbo frames.

Any alternatives you've considered:
None

Related discussion: #3338