Siemens Unix V4.0 - Manual (Page 202)

Implementing WINS Name Resolution Services
Product Manual U7613-J-Z815-6-76
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If WINS is not enabled on the client: For a non-WINS computer to register its name, a
name registration request packet is broadcast to the local network stating its NetBIOS
computer name and IP address. Any device on the network that previously claimed that
name challenges the name registration (with a
negative name registration response ), resulting
in an error for the computer attempting to register the duplicate name. If the name registration
request remains unchallenged for a specific time period, the requesting computer adopts
that name and address.
After a non-WINS computer claims a name, it must challenge duplicate name registration
attempts (with a
negative name registration response ) and respond positively to name queries
issued on its registered name (with a positive name query response ). The positive name query
response contains the IP address of the computer so that the two systems can establish a
session.
Name Renewal
Client computers periodically are required to renew their NetBIOS name registrations with
the WINS server. When a client computer first registers with a WINS server, the WINS
server returns a message that indicates when the client will need to renew its registration,
as follows:
● Default renewal interval for entries in the WINS database is six days.
● WINS clients try to refresh their name registrations whenever half of the renewal interval
is expired.
● Primary and backup WINS servers should have the same renewal interval.
● An entry defined as static never expires.
If the entry is owned by the local WINS server, the name is released at the specified time
unless the client has renewed it. If the entry is owned by another WINS server, the entry is
revalidated at the specified time. If the entry does not exist in the database of the WINS
server that owns the entry, it is removed from the local WINS database. A name renewal
request is treated as a new name registration.
Incorrectly adjusting the renewal interval might adversely affect system and network
performance.
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