I came across your request which is similar to my requirement, having SRX cluster connected with reth interface to cisco 3850 switch. so is this design not possible to achieve?
your response is highly appreciated.
Sent: 05-02-2017 09:50
From: Erdem Sener
Subject: SRX Cluster to L3/L2 Switch
Went through the document, port Agreggation accross a cluster wont be possible and since the Reth interface supports sub interfaces and vlan tagging, I would have to go with SRX on a stick as my only alternative for intervlan routing.