Failed to resolve 'SMS_SLP' to IP address from WINS.
LSGetAssignedSiteFromSLP : Unable to get the list of SLPs
Here is the procedure for manually configuring WINS SLP parameters:
show name Name=SMS_SLP endchar=1A
Next step is to configure WINS server in your network card TCP/IP properties or if there is DHCP in the network to configure WINS parameter in DHCP server.
Now if you try to add Internet SCCM based client to SCCM site code specifying DNS Sufix and click Discover in few seconds SMS Site Code will be discovered successfully. Same scenario is for workgroup computers belonging to different AD forest and managing by SCCM in other forest.