Reverting to NIS

A site that has transitioned from NIS to LDAP using the N2L service is expected to gradually replace all NIS clients with LDAP naming services clients. Support for NIS clients eventually becomes redundant. However, if required, the N2L service provides two ways to return to traditional NIS, as explained in the next two procedures.

Tip - Traditional NIS ignores the N2L versions of the NIS maps if those maps are present. After reverting to NIS, if you leave the N2L versions of the maps on the server, the N2L maps do not cause problems. Therefore, it might be useful to keep the N2L maps in case you later decide to re-enable N2L. However, the maps do take up disk space.

How to Revert to Maps Based on Old Source Files

Become an administrator.
For more information , see How to Obtain Administrative Rights in Oracle Solaris Administration: Security Services.

Stop the NIS daemons.

# svcadm disable network/nis/server:default

Disable N2L.
This command backs up and moves the N2L mapping file.
```
# mv /var/yp/NISLDAPmapping backup_filename
```
Set the NOPUSH environment variable so the new maps are not pushed by ypmake.
```
# NOPUSH=1
```
Make a new set of NIS maps that are based on the old sources.
```
# cd /var/yp
# make
```
(Optional) Remove N2L versions of the NIS maps.
```
# rm /var/yp/domainname/LDAP_*
```

Start the DNS and the NIS service.

# svcadm enable network/dns/client:default
# svcadm enable network/nis/server:default

How to Revert to Maps Based on Current DIT Contents

Back up the old NIS source files before performing this procedure.

Become an administrator.
For more information, see How to Obtain Administrative Rights in Oracle Solaris Administration: Security Services.

Stop the NIS daemons.

# svcadm disable network/nis/server:default

Update the maps from the DIT.
```
# ypserv -r
```
Wait for ypserv to exit.
Disable N2L.
This command backs up and moves the N2L mapping file.
```
# mv /var/yp/NISLDAPmapping backup_filename
```
Regenerate the NIS source files.
```
# ypmap2src
```
Manually check that regenerated NIS source files have the correct content and structure.
Move the regenerated NIS source files to the appropriate directories.
(Optional) Remove the N2L versions of the mapping files.
```
# rm /var/yp/domainname/LDAP_*
```

Start the DNS and NIS service.

# svcadm enable network/dns/client:default
# svcadm enable network/nis/server:default

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