Quote from trader587:
If your stop is native on the Exchange then it will get triggered even though the client feed is down. Globex has native Stop Limit orders.
Quote from trader587:
Only if IB simulates a stop for you eg Trailing Stops then if IB's feed with the CME goes down then your stop will not be executed. But if you have a STOP LIMIT order then it will trigger as it is already on the GLOBEX servers.