Internetwork Path

Overview

This Plugin displays in a table view and on the Internetwork Map the path used by IP packet to travel in both direction from one IP node to another.

Principle

The Plugin reads the default router information of the originating node and destination node and routing table of each router along the path. With this information the Plugin could deduce the path used by packets from source to destination.

Against the TraceRoute Plugin it doesn't send ICMP packets to discover the path.

Plugin Installation

The installation of the Trace Route Discover Plugin is performed in the Service workspace.
Select first the Service Tab in the Workspace, then press the right mouse button, you should see the contextual menu :

From there select Add New Service... and select the InternetworkPathRoute. When done you should see the Plugin in the list of Service Plugin.

A double click open the Dialog box.

Configuration

The configuration of the Plugin consist of few setting. You should provide the IP Start address and the IP End address.

"IP Start" is the address of the IP node from which you want to start the path search.
"IP End" is the address of the IP node to which you want to stop the path search.

You can pick a host in the directory by using the WIZARD button +.

Gateway is the default routeur that the path search machanism should use on the node local network. You could also discover it, if the node is SNMP aware, by using the "Select" box.

Supervision

By clicking the "Start" button you run the path search processus. The table is filled up by the information gained form each succesive hop. Hops are IP router in this teminology. Routers could be hardware router, but also Firewall or server acting as IP routers.

The columns of the table have the following significances :

Hops

The Hop number on the path

Network/host

The Network/ host on the path

Next Hop Found	A route exist for the destination network in the router routing table
Use Default Route	There is no route for the destination network in this router routing table, the default route is used.
Default Route not found	There is no route for the destination network in this router routing table and there is no default route. The Path calculation process is stopped.

IPRoute Next Hop

The next router on the path

RouterName

The Router Name in the Directory

RouterIPif

The Router Interface name in the Directory

Network

The Network Name in the Directory

NetworkSpeed

The Network Speed specified in the Directory

At the same time, the Path is displayed on a the MAP. The path is shown as a purple line that goes from hop to hop.

Options

The Trace Reverse Route option shows the way that packets will use to travel from the destination back to the source.

The Zoom Map allow you to change the size of the MAP.