In most cases, absence of multicast data is caused by network-related configuration issues described below.
Updating firewall rules or simply turning it off usually solves the issue.
Disabling reverse path filtering by updating system control parameters usually resolves the issue.
System control parameters (/etc/sysctl.conf) affecting reverse path filtering:
|net.ipv4.conf.default.rp_filter||Defines default policy.|
|net.ipv4.conf. NetworkInterface .rp_filter||Defines policy for a NetworkInterface network interface.|
To determine current status of reverse path filtering run the command below:
To disable reverse path filtering from console run following command:
GettingStarted sample program configures the Handler to listen to market data on all network interfaces on Windows and Linux. If network configuration supposes specifying exact network interface (like 'eth0' on Linux) for market data listening, then OnixS::eSpeed::MarketData::Itch::HandlerSettings::networkInterface parameter value must be updated accordingly.
More information can be found in our Lost multicast packets troubleshooting guide.