85a8d692_C_____Twin_Oaks_Computing__Inc__Description
[Environment Variable] COREDX_MULTICAST_TTL [Values] integer > 0 [Description] 
This is the time to live (TTL) set on all the multicast packets (including those used for discovery). By default, COREDX DDS uses the operating system configured TTL (generally "1"). Increasing this allows the multicast packets to survive going through network routers.
CoreDX DDS Quick Start Guide for C++ | Twin Oaks Computing, Inc
Description