Node:Psnmp, Previous:Treeb, Up:Top
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:
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
the contextual menu of the map (right click on a host).
Draw modeallows you to choose a host placement algorithm:
Sublayerdisplays the center host with his direct sons.
Depth treedisplays the tree, each depth level at the same y coordinate.
Collapsed treedisplays the tree , each depth level at the same y coordinate, centering each sub-trees on his father.
Circular layersdisplays the tree, each depth level at the same radius.
Depthallows you to restrict the depth of the tree; distances are relative to center host. It can be infinite.
Show typesallows 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 modescan 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
Redraw map to make it effective.