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Psnmp

This is the graphical interface of the psnmp package. It draws the topology of the network which is stored in a database filled by treeb.

The screen is divided in three parts:

• the left part shows an tree of the topology (explorer tree)
• the right part shows a graphical map of the network
• the bottom part is used to displays some informations like on-the-fly queries' result.

If you are in a VLANned network, the first thing you have to know is that treeb built one tree per virtual network. psnmp deals only with a tree at a time but it can merge many VLAN-trees if the merging does not create loops. At start, only the first VLAN is displayed. You can try to merge it with other VLANs or simply display another virtual network playing with the Vlans menu. Once your VLAN selection is done, click on Merge Vlans to do the job. If loops are detected, a message will be displayed and the first VLAN will be selected. Note that you have to click on Redraw map (View menu) to update the map; after the merging only the explorer tree is updated.

The map view is very configurable. It is centered on a particular host called the center host. After a redraw, the center host becomes the root of the tree. To change the center host, you can click on a host in the explorer tree, <Control> being pressed, or choose Recenter in the contextual menu of the map (right click on a host).

• Draw mode allows you to choose a host placement algorithm:
  • Sublayer displays the center host with his direct sons.
  • Depth tree displays the tree, each depth level at the same y coordinate.
  • Collapsed tree displays the tree , each depth level at the same y coordinate, centering each sub-trees on his father.
  • Circular layers displays the tree, each depth level at the same radius.
• Depth allows you to restrict the depth of the tree; distances are relative to center host. It can be infinite.
• Show types allows you to restrict the type of hosts displayed. You can choose it for the explorer tree and for the map, but the explorer tree restriction can't be stronger than map restriction. However hosts which have restricted types must be placed on the topography map provided that they have at least one son.
• Recenter modes can be chrooted (the fathers of the center host become sons) or subtree (the fathers of the center host are discarded).

After each change in the Draw mode menu, you have to click one time on Redraw map to make it effective.

Table of Contents

• Copying
  • Preamble
  • How to Apply These Terms to Your New Programs
• Overview
• Treeb
• Psnmp