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  1. EtherNet/IP Adapter V2
  2. PSEIS-480

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

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: V2.8.3.0
    • Fix Version/s: V2.9.1.0
    • Component/s: Firmware
    • Labels:
      None
    • Account:
      SPC EthernetIp Slave (SPCETHERNE)

      Description

      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.

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                  • Reporter:
                    KMichel Kai Michel
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                    • Created:
                      Updated:
                      Resolved: