OnixS ICE iMpact Multicast Price Feed Handler C++ library  8.5.1
API documentation

Verifying multicast data availability

Sometimes it may happen, that subscription to the market data is successfully started and product definitions are received. But no order books updates are reported by the Handler as well as there are no notifications about changes in markets state. In most cases, this happens because of the absence of multicast messages from the Multicast Price Feed. To verify this assumption, it's necessary to subscribe to the error event (see Event Listeners for more information). If errors with code equal to OnixS::ICE::iMpact::MarketData::KnownWarnings::NoNetworkActivity value is reported on a periodical basis (usually with reason "There's no activity on feed within `N` seconds"), then the assumption is valid. In such case network settings must be verified. Please read Multicast Test Program for more details.