We see quite a few customers using a central CiscoWorks account for device access. In this way, users can cross-reference their ACS logs with the audit trail and Change Audit logs in CiscoWorks to determine who is making changes. Few customers actually store personal user credentials in DCR. Even fewer store no credentials in DCR, and rely solely on per-user credentials as job-based usernames and passwords. The advantage of this approach, however, is that the ACS logs will always contain the actual user that made the change.
The seed file is maintained under Campus Manager > Admin > Device Discovery > Discovery Settings. However, any device in DCR becomes a seed for purposes of discovery. If you'd rather manually import devices into DCR from a flat file, this is perfectly fine. In that case, you would never need to run Device Discovery.
DHCP is unsupported, and will break CiscoWorks. Changing an IP address is very easy. Shutdown dmgtd. Find all gatekeeper.ior files under NMSROOT and delete them. If your server is multi-homed, edit NMSROOT/lib/vbroker/gatekeeper.cfg, and follow the commented instructions towards the bottom of this file. Then restart dmgtd, and you're done.
