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NBUTIL is a DOS application that enables the use of NetBIOS resources over TCP/IP. NBUTIL creates a table that is used by the TCP/IP protocols to convert NetBIOS names to IP addresses. The table enables TCP/IP to locate Microsoft file and print servers and other servers that use NetBIOS, regardless of where they might be on a network -- even over the Internet. Your Network Administrator will provide information about the use of NBUTIL and any required IP addresses if necessary.
This chapter describes the use of NBUTIL for those who need it.
CiscoRemote contains multiple protocol drivers, one of which is appropriate for your networking environment. The CiscoRemote Installation program automatically installs the correct driver.
The TCP/IP virtual protocol driver (VxD) works with the Microsoft Windows® for Workgroups and the Novell® Netware environments. This driver is fully compatible with the Microsoft NDIS-compliant MAC driver API (Application Programming Interface) and the Novell ODI-compliant MAC driver API. Running in 32-bit, protected mode, the VxD improves the performance of network-aware applications and eliminates the use of DOS conventional memory.
The TCP/IP real mode protocol drivers are designed for the Microsoft LAN Manager networking environment---one for use with NDIS-compliant MAC drivers and the other for ODI-compliant MAC drivers. Each real mode protocol driver is a 16-bit terminate-and-stay-resident (TSR) program that runs in DOS conventional memory.
All of these TCP/IP protocol drivers are fully compatible in terms of features and APIs. They contain enterprise networking features, including an SNMP (Simple Network Management Protocol) agent, a DHCP (Dynamic Host Configuration Protocol) client, full NetBIOS Name Server support and parametric tuning for different network configurations.
NetBIOS based LANs, such as LAN Manager, need to translate NetBIOS names into TCP/IP addresses. NBUTIL provides an easy way to provide this mapping.
The NBUTIL utility program allows you to create and maintain a NetBIOS name table used by the CiscoRemote protocol driver to translate NetBIOS names to IP addresses. This enables you to connect to remote systems that are not located on your local subnetwork by referencing their names instead of IP addresses.
The entries created by NBUTIL are not maintained beyond the current session. NBUTIL must be run each time that the TCP/IP stack is reloaded. This can be done by including the NBUTIL commands in a WINSTART.BAT file or, for the real-mode TCP/IP stack, in the AUTOEXEC.BAT file.
You can use the NBUTIL command to add entries to the NetBIOS name table in two different ways:
If, for instance, you wanted to add the NetBIOS name MailServer with the IP address 111.111.11.11 to the NetBIOS name table, you would include the following command:
NBUTIL -a 111.111.11.11 MailServer -l 2
where:
If you do not know the LAN adapter number being used, find the value for the
LANABase parameter in one of the following files:
-l
option is not required with the NBUTIL command.
If you are using CiscoRemote for both LAN and remote access, there are two protocol drivers active. If you intend to use NetBIOS applications for both connections, you must identify the LAN adapter number for each driver in separate NBUTIL commands.
-s displays all the current entries in the NetBIOS name table.
-t enables you to put embedded spaces in NetBIOS names by translating an underscore (_) into a space. When used with the -s option, -t translates spaces back into underscores.
-w translates NetBIOS names into the format of the LAN Manager workstation name.
-x translates the NetBIOS name you want to add to the NetBIOS name table into names that can be used by servers running LAN Manager.
? displays a description of all command line options used with NBUTIL.
You can also create an ASCII file containing IP addresses and their associated NetBIOS names. The entries in this text file can be added to the NetBIOS name table. You must use the following format for this file:
ipaddress netbiosname #optionalcomment
where:
ipaddress is the IP address of the remote system you want to access.
netbiosname is a NetBIOS name associated with the IP address of the remote system you want to access.
#optionalcomment is a number symbol (#) followed by any additional information you want to add to the file as a comment.
Either of these two methods will achieve the same goal---that of adding the necessary addresses to the CiscoRemote applications.
If you are using the Novell Netware or Microsoft Windows for Workgroups, you must run the NBUTIL utility after Windows is running and the TCP/IP stack has been loaded. Use the following procedure to make sure this happens automatically.
If you are using Windows 3.1, you need to add the following NBUTIL commands to the end of your autoexec.bat file before the win command.
C:\cisco\bin\NBUTIL -c
C:\cisco\bin\NBUTIL -a xxx.xxx.xxx.xxx netbios_name
where xxx.xxx.xxx.xxx is the address of your server and netbios_name is the NetBIOS name that it uses.
You could also point the NBUTIL command to an ASCII text file which has the names and IP addresses to add to the list.
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