Question Re: Problems in RFC connection in Technology Q&A

Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:06:18 GMT

Dear All,

I'm trying to create RFC connection between 2 servers (Server A and Server B).

The connection from Server A to Server B is working fine.

However, the problem is, I cannot get Server B to "talk" to Server A. From the connection test in SM59, everything seems to be working fine. There is no error message. Any idea why it happen?

Regards,

John

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:21:12 GMT

Hi Jhon,

RFC is onesided like if you want to connect your B server from A server there should be an another rfc from your A server with the login credentials which will be in client of your system A.

Just create the rfc and try it should work.

Regards,

Vamshi.

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:24:13 GMT

Dear John,

If the connection from Server A to Server B is working fine. Can you compare the setting of the both Server`s .

Plesae configure the same parameter in Server B ( which is already working fine in Server A ) to access Server A .

I feel some thing is wrong in Logon & Security .

Regards,

Santosh Karadkar

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:31:49 GMT

Dear Santosh / Vamshi,

Thanks for replying.

In SM59, the connection test from Server B to Server A is working fine. However, when i click on the "Remote Logon" button, nothing happen.

Santosh, can you clarify further the details that i need to look for in the server?

Regards,

John

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:37:10 GMT

Dear John ,

Santosh, can you clarify further the details that i need to look for in the server? - > Have you tried with providing the IP Address instead of Host name ?

Also track the log in SM59 -> RFC Trace .

Regards,

Santosh

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 09:49:56 GMT

Dear Santosh,

Thanks for your reply.

I have tried using the IP address but the same problem persists.

I am checking the log for the RFC trace now and will update you again.

Regards,

John

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 10:17:39 GMT

"However, when i click on the "Remote Logon" button, nothing happen" the user which is registered in RFC connection is dialogue or not? If not "nothing happen" you can only "connection test" and in Utilities -->

Authorization test (Ctrl+f4). Regards. Award if helpful

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 10:24:24 GMT

Dear Santosh,

I receive 3 error message from the log:

Timeout during connection setup. Please check partner availability

SAP gateway connection failed. Is SAP gateway started?

Unable to determine host address: NiHostToAddr failed

However, I've check in the MMC and the SAP gateway service is green. I have also use IP address instead of the hostname.

Sergo, please explain more on your statement.

Regards,

John

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 10:32:49 GMT

Dear John ,

Track the correct Gateway using SMGW or do not specify the Gateway details , leave it blank .

Update us if you are getting any error .

Regards ,

Santosh

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 10:38:41 GMT

I explain. You create the RFC connection betwen A and B server. You can test connection and connection is fine, but then you press on "remote connection" nothing happen . It's means this : you create the connection on server A in SM59 and provide the information about user in system B in this RFC. Go to system B, transaction su01,

find the user which is described in connection --> edit him , on the "Logon Data" page you can chek the "User Type" if the type is not the Dialog --> "when i click on the "Remote Logon" button, nothing happen"" if you change to dialog you can use "Remote Logon" . Regards.

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 11:05:54 GMT

Dear Sergo,

Both users for Server A and Server B has the same details. Both are Dialog users.

Santosh, I've tried on transaction for SMGW. This time, I'm only using dialog logon. When i login to server A, there are no information displayed in SMGW.

When i logged in to server B, there is an entry for SMGW.

Does it mean that there are the issue is now with server A? Please note that i do not establish any remote connection this time.

Regards,

John

Re: Problems in RFC connection

Former Member — Mon, 24 Mar 2008 11:36:33 GMT

Dear John ,

What is your System Number ?

For Eg :

If the System Number is 00 then the Gateway should be sapgw00

Try connecting using blank entry and post the result .

Regards ,

Santosh

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 03:18:18 GMT

Dear Santosh,

For Server A

System Number: 00

For Server B

System Number: 00

Can you guide me on how to connect using a blank entry?

I'm sorry as I'm still new in Basis.

Regards,

John

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 04:52:54 GMT

For Eg :

If the Target System Number is 00 then the Gateway should be sapgw00

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 04:55:58 GMT

Hi John,

If possible do this test. Assign the user used in RFC destination SAP_ALL profile temporarily and then do a test. Also please check in system A whether you are getting RFC related ABAP dumps.

Regards.

Ruchit.

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 07:55:29 GMT

Dear Santosh,

How can I check for the Gateway details? Cause when i execute SMGW, there is no details in server A.

As for server B, the Gateway is sapgw00. However, sometimes when i execute SMGW in server B, it shows no result.

Really appreciate it if you can show me the detailed steps to get the information.

Hi, Ruchit. I have assigned SAP_ALL for both users. There are no Abap dumps for both servers as well. The connection test went smoothly. Just that from server B, there is no result when i click on the "Remote Logon" option in SM59. I'm able to do that from server A.

Regards,

John

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 08:31:23 GMT

Dear John ,

Forget SMGW , as we come to conclusion that System Gateway is sapgw00 .

I ask you to execute SMGW to find Gateway information of the system .

Apart from this as i said earlier please check the Logon & Security setting of the RFC destination .

Regards ,

Santosh

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 09:08:41 GMT

Hi Jhon,

Make sure that the users are dialog users or communication users, i dont think you should type any thing in the gate way details, just leave them as blank,just select your host name or the local ip of your server, it works we have made the same connection from our dev system to prd system make sure that you are using connection type as r/3(3).It should work no need of looking for gateway and all those stuff for just rfc.

Regards,

Vamshi.

Re: Problems in RFC connection

Former Member — Tue, 25 Mar 2008 12:39:45 GMT

Hi John,

Just check if you are able to login into system A using the user you have defined for RFC destination corresponding to system A that has been created in system B.

Regards.

Ruchit.

Re: Problems in RFC connection

Former Member — Thu, 27 Mar 2008 02:53:03 GMT

Dear Santosh,

The Logon and Security setting, both have the same settings.

Vamshi, I have done as per your instruction but still the problem persists.

Ruchit, Yes, I'm able to login to the respective server using the user that I've created.

I'm suspecting if there is a possibility that the firewall settings is blocking the IP? This is because in server A, when i inserted the IP address in SM59, it will automatically change to the domain name once I click save.

However, the same outcome does not shows in server B. Is this a possible reason that might happen?

Regards,

John

p/s: sorry for the late reply. some issue on my sdn login