ISTIO - Websocket communication

Hi, Websocket communication is not happening even after adding websocketUpgrade: true

Below are my questions
1.Will websocket connection (wss) in istio over ELB work?
What protocols should we use in elb for wss
2. Any changes we need to make from gateway, virtualservice or service files?

@kumar I’m also facing the same issue, were you able to get this working?