[Samba] NIS extensions - only 3 of 55 entries present

[Brian Candler]

I have a test setup of samba 4.1.6 under ubuntu 14.04.

When I do the query shown at
https://wiki.samba.org/index.php/Using_RFC2307_on_a_Samba_DC#Check_if_NIS_Extensions_are_installed_in_your_Directory
it shows I have the ypServ30 container installed.

If I change this query to -s sub then I find 3 entries in that subtree 
(see [1] below)

However the full schema in /usr/share/samba/setup/ypServ30.ldif has 55 
entries. The three records I have correspond to just the last three 
entries in this file.

Questions:
- Is this normal for an out-of-the-box Samba install?
- Should I install the other 52 LDAP entries, if I want to do 
centralised user/group mapping for Unix servers?

Thanks,

Brian.

[1]
root at dc1:~# ldbsearch -H /var/lib/samba/private/sam.ldb -s sub -b 
CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,DC=adtest,DC=int,DC=example,DC=net
# record 1
dn: 
CN=bydefaults,CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,DC=adtest,DC=int,DC=example,DC=net
objectClass: top
objectClass: msSFU30NISMapConfig
cn: bydefaults
instanceType: 4
whenCreated: 20140618075513.0Z
whenChanged: 20140618075513.0Z
uSNCreated: 3767
uSNChanged: 3767
showInAdvancedViewOnly: TRUE
name: bydefaults
objectGUID: ac691710-e588-403f-93ed-6840fad3d7de
objectCategory: 
CN=msSFU-30-NIS-Map-Config,CN=Schema,CN=Configuration,DC=adtes
  t,DC=int,DC=example,DC=net
msSFU30KeyAttributes: msSFU30Name
msSFU30FieldSeparator:: IA==
msSFU30IntraFieldSeparator:: IA==
msSFU30SearchAttributes: msSFU30Name
msSFU30ResultAttributes: msSFU30Name
msSFU30MapFilter: (objectCategory=msSFU30YpServers)
distinguishedName: 
CN=bydefaults,CN=ypservers,CN=ypServ30,CN=RpcServices,CN=Sy
  stem,DC=adtest,DC=int,DC=example,DC=net

# record 2
dn: 
CN=adtest,CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,DC=adtest,DC=int,DC=example,DC=net
objectClass: top
objectClass: msSFU30DomainInfo
cn: adtest
instanceType: 4
whenCreated: 20140618075513.0Z
whenChanged: 20140618075513.0Z
uSNCreated: 3768
uSNChanged: 3768
showInAdvancedViewOnly: TRUE
name: adtest
objectGUID: 78a19690-7641-4355-a92c-3545897c4403
objectCategory: 
CN=msSFU-30-Domain-Info,CN=Schema,CN=Configuration,DC=adtest,D
  C=int,DC=example,DC=net
msSFU30MasterServerName: DC1
msSFU30OrderNumber: 10000
msSFU30Domains: adtest
distinguishedName: 
CN=adtest,CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System
  ,DC=adtest,DC=int,DC=example,DC=net

# record 3
dn: 
CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,DC=adtest,DC=int,DC=example,DC=net
objectClass: top
objectClass: container
cn: ypservers
instanceType: 4
whenCreated: 20140618075513.0Z
whenChanged: 20140618075513.0Z
uSNCreated: 3766
uSNChanged: 3766
showInAdvancedViewOnly: TRUE
name: ypservers
objectGUID: b116fa4c-ff35-42ca-98ad-72a619c4f43b
objectCategory: 
CN=Container,CN=Schema,CN=Configuration,DC=adtest,DC=int,DC=ex
  ample,DC=net
distinguishedName: 
CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,DC=adtest
  ,DC=int,DC=example,DC=net

# returned 3 records
# 3 entries
# 0 referrals