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SNC performance issue single sign-on

Dear all,

We are looking into a performance issue with a SAP (ERP and CRM) system

that relies on SNC for single sign-on.

We want to understand the SAP SNC vs Active Directory traffic better,

because we think that this traffic is a possible cause for the

encountered performance problems.

1. Does SNC make a Call to Active Directory at all?

2. Does SNC make a Call to Active Directory for each new user request through the GUI? (end-user to CRM)

3. Does SNC make a Call to Active Directory for each new user request through an RFC connection? (CRM to ERP)

4. The setting for SNC is now for a high speed LAN, what immediate effects can be expected when switching to a setting for low speed links?

Many thanks in advance,

Former Member replied

Which external library are you using for SNC? I guess, it's Kerberos. If so, the SAP server will contact the KDC once (KDC in your case may be the ADS) during start up. Every client that wants to connect to the SAP server using SNC will contact the KDC once using either the DIAG or the RFC protocols before connecting to the SAP Server.

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