OPC Error 0x800706BA

Question

_{Tuesday, March 15, 2016 5:49 PM}

Hello, I have an OPC client (DCOM) running on a Server 2016 machine which has 2 IP addresses on the same NIC i.e., multihomed NIC using the advanced configuration properties of the Adapter.

Both IPs belong to the same Subnet.

The OPC Server has only one IP address.

Occassionally, I face error 0x800706BA and the data is lost for some time.

I have researched on the internet and ensured that the DCOM port 135 is open for communication on both ends. All settings, OPCEnum etc are running fine. Also, the error isnt permanent and appears intermittently.

Any help/guidance would be helpful.

Thanks

All replies (4)

_{Wednesday, March 16, 2016 6:32 AM ✅Answered}

Hi _SurajP,

>>In fact, if I have only one IP it works clean. However, I need to have it working with 2 IPs.

It is not recommended using multihomed windows server,it will cause many issues.

If you still want to use it，you should contact your application's vendor for techsupport.

Best Regards,

Cartman

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_{Wednesday, March 16, 2016 3:08 AM}

Hi _SurajP,

According your description,you have got error 0x800706BA. Error code 0x800706BA indicates that the remote procedure call (RPC) server is unavailable.

>>I have an OPC client (DCOM) running on a Server 2016 machine which has 2 IP addresses on the same NIC i.e., multihomed NIC using the advanced configuration properties of the Adapter.Both IPs belong to the same Subnet.

Why are you using 2 IP address in same subnet on server?When you use a multi-homed computer to connect to another computer, and the multi-homed computer is running one of the versions of Microsoft Windows that is referred to in the "Applies to" section, there may be a delay in establishing the connection.So please try to disable one  nic and try again.

  Best Regards,

Cartman

Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected].

_{Wednesday, March 16, 2016 4:12 AM}

Hi Cartman Shen,

I understand what you said about the 2 IPs. However, the purpose of having 2 IPs is for completely different reason. I have an application requirement which uses this feature and cannot change this.

In fact, if I have only one IP it works clean. However, I need to have it working with 2 IPs.

Thanks

_{Sunday, April 10, 2016 9:14 PM}

Hello Cartman,

I am not sure why multihoming is not recommended. While I understand it brings complexity but then it is particularly helpful in applications trying to build some sort of "redundancy". So it seems to be a case of getting more features with added complexity. Is there microsoft official documentation that you can point me to which talks about why not to use this feature provided by Windows and other OSs.

Thanks