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Surveyor
User’s Guide
Name tables are limited to 5,000 entries. The Maximum Number of Entries field in
the
Name Table Settings dialog box must be at least 100 and no more than 5,000.
For remote resources, Surveyor uses names learned from remote as well as local
resources when displaying capture or monitor views. A local copy of the remote
name table is updated at a specified time interval. The time interval for refreshing
the remote name table is set in the
Configuration menu of Surveyor. If there are
duplicate names between remote and local resources, local names take precedence
and the name table will display the local name only.
The active name table can be loaded from a file. Loading the name table from a file
will overwrite all existing entries in memory. Keep this in mind when using the
network to learn names; until names are saved to a file, they can be lost if you exit
Surveyor or overwrite the name table contents.
Entries in the currently active name table appear in a
Name Table area that is within
the dialog boxes for appropriate filter statements. The
Name Table window shows
all name and address associations, including the protocol and the frame type. Before
starting to write a capture or display filter, make sure the name table you want is the
currently active name table (loaded into memory). This ensures that the proper
symbolic names are available.
To use the same name table information for all systems running Surveyor, you can
set up a common default name table. All Surveyor users can configure the path and
name of the default name table, which can be the same file stored on a server. See
“Providing a Name Table to Surveyor” in Chapter 3 for more information.
Building a Name Table From the Network
The following provides a general outline of how to build a name table for the names
in your network.
1. Run Surveyor in monitor mode. Do not use any filters. The
Learn Names check
box must be selected in the
Name Table Settings dialog box; if you also select
the
Learn Address option, Surveyor places any addresses it sees on the network
into the name table as they are discovered in the data stream.
2. If you have names you want to associate with addresses learned from the
network, edit the name table using the
Name Table dialog box. This step can
also be performed after the name table is saved.
3. Save the name table to a file. You must save the name table before you exit
Surveyor or new name table data will be lost. If you save the name table data
to the default name table, hosts.nam, the new name table data will be loaded
automatically whenever you restart Surveyor. If you save the name table to a
new file, use the .nam file extension for easy reference.