Trust between meshes

Hi
We have 2 clusters each having their own independent CA(multiple meshes). We are looking at a way to acheive end to end mTLS trust across clusters so we can propagate clientID(spiffeID) and therefore apply Authn/Authz policies.
This document https://istio.io/docs/ops/deployment/deployment-models/#trust-between-meshes
says we can exchange trustBundle manually across clusters so we can trust and do end to end mTLS.

Haven’t found any examples/documentation regarding how to acheive this.

@leitang Could you take a look?

AFAIK, https://istio.io does not have an example or a guide for exchanging trust bundles manually across clusters. You may create a feature request on https://github.com/istio/istio.io/issues to request for adding such documentation to https://istio.io.

I have raised an issue for the same: https://github.com/istio/istio/issues/23985

Since this would take sometime, do you have any pointers on how to acheive the same.