Stack does not reject multicast connection to a device that is located in another subnet, if the TTL value is <= 1.

The stack must reject an incoming I/O connection with status 0x813 in case that the TTL value for multicast traffic is smaller or equal to 1.

Extended status 0x813:
"A multicast connection has been requested between a producer and a consumer that are on different subnets, and the producer is not configured for off-subnet multicast."

In case attribute 8 "TTL Value" of the TCP/IP Interface object is not actiavted, the TTL value that is used for outgoing multicast traffic is always one.
So a multicast connection into another subent can only work if attribute 8 is activated and the actuall TTL values is set to a value greater 1.

Currently, the stack does not reject the connection. The connection is build up, but times out after a while since the I/O frames to the originator are not routed throught the gateway due to the TTL value of only 1.