H - Electricity – 04 – L
Patent
H - Electricity
04
L
344/1.1
H04L 12/56 (2006.01) H04L 12/26 (2006.01)
Patent
CA 1279917
ABSTRACT OF THE DISCLOSURE Disclosed is a communications measurement matrix display for a protocol analyzer which is used to monitor traffic on a packet-switched network. The present invention allows the protocol analyzer user to see, at a glance, a complete and accurate overview of communications between more than thirty- one nodes on a packet-switched network, over a user selectable range of measurement-time intervals. The matrix display has two modes. One mode shows the source versus the destination nodes of the network as a 32-X-32 two-dimensional X-Y grid matrix having thirty one source nodes ordinally indicated along one grid axis and thirty one destination nodes ordinally indicated along the other grid axis. The thirty second ordinal position on each axis designates any node other than the first thirty one nodes. A display marker positioned on the grid indicates communication between the source node and the destination node which correspond to the (X,Y), that is, the (SOURCE, DESTINATION), coordinates of the marker. In a second mode, the display shows the node connections only: the display is simply a 32-X-32 two-dimensional X-Y grid having thirty two nodes ordinally indicated on each axis without direction, such as source or destination, indicated. The display of the second mode is essentially the display of the first mode folded along its diagonal. The matrix display, in both modes, is particularly well suited to the IEEE 802.3 Local Area Network packet-switched network. The matrix display is accomplished using a combination of dedicated hardware and real-time software. The hardware consists of a so-called address trap machine which is programmed with the addresses of the nodes of the network. The address trap machine catches the source and destination address of each information packet transmitted on the network transmission medium without disrupting packet transmission. The address trap then outputs a sixteen-bit word containing the node numbers matched by the source and destination addresses of each frame. A fast execution software loop collects the counts for each of the nodes and puts the results into a 32-X-32 array. Higher level software accumulates the array values for the duration of a user- selected measurement-time-interval and quantifies each count based on a user-adjustable legend setting. The appropriate marker from the user-adjustable legend of traffic volume markers is then presented on the grid matrix display.
543171
Morrill Justin S. Jr.
Quan James P.
Tomberlin Jeffrey
Agilent Technologies Inc.
Sim & Mcburney
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