Hello all - it appears the offending option is only slp-service-scope statement, slp-directory-agent being present will still allow daemon to load correctly. This is still present in isc-dhcp-server-4.1.1-P1-15.
We can create a custom option 79 to handle this issue in the meantime. option slp-scope code 79 = { boolean, text }; option slp-scope true "scope_name"; This will have to be placed before upgrading from lenny to avoid the hang, and comment out or remove the existing option slp-service-scope statement. Hope this helps someone :) Grant Meeker Technology Services
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