|
This window (View
=> Statistics)
displays vital network statistics of your PC or LAN segment, such
as packets per second rate, bytes per second rate, Ethernet
protocols, IP protocols and sub-protocols distribution graphs. You
can copy any of the graphs to the clipboard by double-clicking on
the graph. Ethernet protocols, IP protocols and sub-protocols "pie"
graphs can be rotated using the small buttons in the lower right
corner for better visibility of the slices.
The data displayed on each page can be saved as a bitmap or
comma-delimited text file using the context menu or drag-and-drop.
The
Report
page allows you to have CommView automatically generate
customizable reports in HTML or comma-delimited text
formats.
Network statistics can be collected either by using all the data
that passes through your network adapter or by using the rules that
are currently set. If you want the statistics counters to process
only the data (packets) that match the current rule set and ignore
all other data, you should check the
Apply current rules
box.
General
Displays Packets per second and Bytes/Bits per second histograms, a
bandwidth utilization gauge (traffic per second divided by the NIC
or modem link speed), as well as the overall packet and byte
counters. Double-clicking on the gauge brings up a dialog window
that allows you to manually configure the adapter speed to be used
in the bandwidth utilization calculations.
Protocols
Displays the distribution of the Ethernet protocols, such as ARP,
IP, SNAP, SPX, etc. Use the
Chart by
drop-down list to select one of the two available calculation
methods: by number of packets or by number of bytes.
IP Protocols
Displays the distribution of the IP protocols. Use the
Chart by
drop-down list to select one of the two available calculation
methods: by number of packets or by number of bytes.
IP Sub-protocols
Displays the distribution of the main IP application-level
sub-protocols: HTTP, FTP, POP3, SMTP, Telnet, NNTP, NetBIOS, HTTPS,
and DNS. To add more protocols, click on the
Customize
button. This dialog allows you to define up to 8 custom protocols.
You should enter a protocol name, select the IP protocol type
(TCP/UDP), and port number. Use the
Chart by
drop-down list to select one of the two available calculation
methods: by number of packets or by number of bytes.
Sizes
Displays the packet size distribution chart.
Hosts by MAC
Lists active LAN hosts by MAC address and displays data transfer
statistics. You can assign aliases to MAC addresses. If you have
too many multicast packets on your network and the Hosts by MAC
table is overpopulated, you may want to group multicast addresses
to one line that will be named GroupedMulticast. You can enable
this function by checking the
Group multicast addresses
box. Please note that only the packets that arrived after
this option has been set will be grouped accordingly; the
previously received packets will not be affected by this
option.
Hosts by IP
Lists active LAN hosts by IP address and displays data transfer
statistics. Since IP packets captured by the program can be
originated from an unlimited number of IP addresses (both internal
to your LAN and external), by default this tab doesn't display any
statistics. To have the statistics displayed, you should first set
the range of IP addresses to be monitored by clicking
Add/Set Ranges.
Normally, these ranges should belong to your LAN, and configuring
the program to monitor a certain range of IP addresses allows you
to have the usage statistics. You can enter any number of ranges,
but the total number of IP addresses being monitored cannot exceed
1,000. To delete a range, right-click on the list of ranges and
select the appropriate menu command. You can assign aliases to IP
addresses. Additionally, you can check the
All
box to have the program list all IP addresses; however, this option
is not recommended for RAM and CPU utilization reasons.
Matrix by MAC
This page displays the graphical conversation matrix between hosts
based on their MAC addresses. The hosts represented by their MAC
addresses are placed on the circle, and the sessions between them
are shown as lines that connect the hosts. Moving the mouse over a
host highlights all connections that this host makes with other
hosts. You can change the number of the most active host pairs that
are displayed in the matrix by changing the value in the
Most active pairs
field. To change the number of the latest address pairs examined by
the program, modify the value in the
Latest pairs to count
field. If your network segment has many broadcast or multicast
packets that overpopulate the matrix, you can ignore such packets
by checking the
Ignore broadcasts
and
Ignore multicasts
boxes.
Matrix by IP
This page displays the graphical conversation matrix between hosts
based on their IP addresses. The hosts represented by their IP
addresses are placed on the circle, and the sessions between them
are shown as lines that connect the hosts. Moving the mouse over a
host highlights all connections that this host makes with other
hosts. You can change the number of the most active host pairs that
are displayed in the matrix by changing the value in the
Most active pairs
field. To change the number of latest address pairs examined by the
program, modify the value in the
Latest pairs to count
field. If your network segment has many broadcast or multicast
packets that overpopulate the matrix, you can ignore such packets
by checking the
Ignore broadcasts
and
Ignore multicasts
boxes.
Errors
Displays the information on the Ethernet errors obtained directly
from the adapter. Below are the explanations of the error
types:
Rx CRS Errors
The number of frames received with circular redundancy check (CRC)
or frame check sequence (FCS) error.
Rx Alignment Errors
The number of frames received with alignment errors.
Rx Overrun
The number of frames not received due to overrun errors on the
NIC.
Tx One Collision
The number of frames successfully transmitted after exactly one
collision.
Tx More Collisions
The number of frames successfully transmitted after more than one
collision.
Tx Deferred
The number of frames successfully transmitted after the NIC defers
transmission at least once.
Tx Max Collisions
The number of frames not transmitted due to excessive
collisions.
Tx Underrun
The number of frames not transmitted due to underrun errors on the
NIC.
Tx Heartbeat Failure
The number of frames successfully transmitted without detection of
the collision-detect heartbeat.
Tx Times CRS Lost
The number of times the CRS signal has been lost during packet
transmission.
Tx Late Collisions
The number of collisions detected after the normal window.
Rx Frames w/Errors
The number of frames that a NIC receives but does not indicate to
the protocols due to errors.
Rx Frames w/o Errors
The number of frames that the NIC receives without errors and
indicates to bound protocols.
Tx Frames w/Errors
The number of frames that a NIC fails to transmit.
Tx Frames w/o Errors
The number of frames that are transmitted without errors.
Please note that:
·Dial-up
adapters are not supported, only hardware Ethernet cards.
·Your
adapter may not support all the listed fields. Some vendors make
NICs that provide all the required information, others
don't.
·Unlike
other data in the Statistics window, the data on the
Errors
tab cannot be reset when you click the
Reset
button. The counter is initialized when your computer boots
up.
Report
This tab allows you to have CommView automatically generate
customizable reports in HTML (including images of charts and
graphs) or comma-delimited text formats.
It is possible to have the program generate statistics on
pre-captured data in addition to real-time statistics. To do that,
load a capture file in
Log Viewer
and click
File => Generate Statistic.
You can optionally reset previously collected statistics displayed
in the
Statistics
window. Please note that this function will not show packet
distribution along the timeline. It is limited to displaying
totals, protocol charts, and LAN hosts tables.
|
