Tried to look but it seems that there is no much information.
Based on my previous experience with various vendors integrations it's important to see who is the "protagonist" of that integration. One would think that most of the time both vendor put the same effort on the integration but it's not always like this.
Based on the information that you provided, it seems that Arista is the main stakeholder of this integration therefore they should have most of the documentation. You can always try to ask your local sales engineer of course.
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