Web Type Recognition; Dns Name Resolution; Nbx Phone Detection - 3Com 3C15500 - Network Director User Manual

The end station stage attempts to determine an end station's type by
performing the following steps:
1 Attempting to start a Telnet session with the device and subsequently
parse the Login banner if the Telnet service is supported.
2 Determining if the node is operating as a file server. This is achieved by
attempting to connect to the device via TCP port 2049.
3 Determining if the node is operating as a print server. This is achieved by
attempting to connect to the device via TCP port 515.
4 Using Microsoft Windows API calls to obtain the Windows operating
system information, provided the node is a member of
domain/workgroup.

Web Type Recognition

Certain 3Com devices have Web (HTTP) management interfaces but do
not support SNMP. Some of these devices identify their type using a
hidden tag in their home page. For devices that have been recognized as
supporting HTTP but not supporting SNMP, 3Com Network Director looks
for this tag in order to recognize the device.

DNS Name Resolution

During this stage 3Com Network Director attempts to retrieve a DNS
name for each IP address that has been detected. 3Com Network
Director uses information from the Windows registry in order to establish
potential DNS servers that exist. It then communicates with them directly
making DNS queries using UDP.

NBX Phone Detection

This stage obtains detailed information about any Network Branch
eXchange (NBX) devices that were discovered as part of the Web Type
Recognition Stage.
The Network Discovery wizard allows you to specify the IP addresses of
individual NBX call processors (NCPs) on the network, and a separate
username/password for each.
This stage is required because the NBX chassis and phones do not support
SNMP. Many of the phones will not have IP addresses and consequently
will not respond to a ping. The NBX chassis contains a non-visible Web
page which 3Com Network Director downloads using HTTP. The page
provides 3Com Network Director with a list of phones that are associated
Key Concepts 95