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Getting NIEHOST-UNKNOWN (-2) error

Former Member
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8,736

Hi Folks,

I'm trying to interate on-premise CRM in my company network with trial HCI on SAP cloud.

After all the configuration, when i try to ping the RFC destination, i see 'NIEHOST-UNKNOWN (-2)' warning generated in SMICM log trace.

as the error indicates, host-unknown, should there be any DNS setting done? if yes, where it should be done?

is there anything that should be done in SOAManger of CRM for HTTP connection to work?

Please advice

Regards,

Rashmi

Accepted Solutions (0)

Answers (3)

Answers (3)

Andrea_Nemes
Associate
Associate
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Hi,

We are trying to connect the CRM System via HCI to C4C. We are doing some ping tests from RFC and when we turn on the trace we get the same message as reported by Rashmi. Any idea what can be wrong? We have checked every thing.

Thanks,

Andréa

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- should we add this to our FAQ?  I'm thinking they need their network person to look at the error log   - maybe the CRM system can't get through their firewall?  

-ginger

Andrea_Nemes
Associate
Associate
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Hi Ginger,

we have found the problem...https before the target host name. We correct it and now it works.

Thanks for the help,
Andréa

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Hi Andréa

Great- thanks for letting us know.  Maybe we should add this to our FAQ!

-ginger

Former Member
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Hi Andrea,

Can you pls let me know where exactly you specify the https protocol. RFC destination host name was without any protocol. Now i tried prefixing 'https://', but i still get the same error.

Regards,

Rashmi

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Hi Ginger,

we can add this to the FAQ - however this error will not always have the reason above. It basically says that the host name does not resolve in DNS. So maybe we can add it this way:

Host name can't be resolved in DNS. Possible reasons

1) typing error in host name

2) http:// or https:// entered before the hostname

3) wrong network or proxy configuration

Best regards,

Berthold

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Awesome - @  - could you add this to our FAQ?  

Thanks, !!

Andrea_Nemes
Associate
Associate
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HI Rashmi,

you should not  have the https prefix before the host name on the target host name on the rfc connection.I hope it helps .

best regards, Andrea

@all: Thanks for adding the possible reasons to the FAQ and given the possible reasons  

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Hi Rashmi,

Couple of things - is HCI talking to a reverse proxy, or directly to your ERP?   Is your ERP setup for SSL and exposed to the internet?  Does your firewall allow you access?    The FAQ Chandan pointed you to will definitely help.

-ginger

Former Member
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Hi Chandan n Ginger,

Thanks for your replies. I had gone through the FAQ before.

Now it looks like a firewall issue. we are investigating further on this. will keep u posted on the outcome.

Regards,

Rashmi

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Hi Rashmi

Did you find your firewall issue?  We should add this to our FAQ.

-ginger

chandansb
Active Contributor
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Hello Rashmi,

Can you please once confirm what is the ping test result for the RFC destination (in SM59)? If it is 500, your ping test is successful.

Also refer the below document, this might be helpful for you to troubleshoot the connections.

Regards,

Chandan