Advanced Server Overview and Installation

Implementing WINS Name Resolution Services

Product Manual U7613-J-Z815-6-76

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.