Hi Shailesh,
thanks for your reply!
I already saw the figure you posted and I think that could be a good solution to my problem, but I have a question: what happens if at the same time i get the failure of Switch1 and SRX-B ?
If I understood what you said... the two subnets will stop to working, is this true?
In another setup with a pair of SSG5 we have some "group" interfaces with 2 physical interface, one connected to switch1 and one connected to switch2 (for both SSG5 node); see attachment.
Thanks
Simone