Calculating Net/Rom route quality

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Once you start building packet nodes, you may be faced with the question of how to setup the routing quality between them. This may be your node and then a node of a neighbor, or they may be both your nodes. We aim to give examples of real world routing with both TheNet (X1J4/Plus) as well as G8BPQ.


Node A to Node B

For this example, we will assume there are two single port nodes running on the same frequency. The alias/callsigns are:

NODEA:KB8UVN-1 NODEB:KB8UVN-2

Both sides have locked routes of a quality 200 to one another. You can check the nodes tables on node A with the "n" command.

n
NODEA:KB8UVN-1} Nodes:
NODEB:KB8UVN-2

Next, you can list the nodes routing table with the "r" command (or "nr" with most *NOS systems).

For BPQ, this is

r
NODEA:KB8UVN-1} Routes:
> KB8UVN-2 200 1!

The leading > indicates the route is presently active, followed by the neighbor callsign, quality and destination nodes.

For TheNet, this is

r
NODEA:KB8UVN-1} Routes:
> 0 NODEB:KB8UVN-2 200 1 !

The leading > also indicates the route is presently active, followed by the port (0 = RF, 1 = RS-232/Diode Matrix), neighbor alias:callsign, quality, destination nodes.

Lastly, you can see available routes for a target node with the "n nodename" command.

For BPQ, this is

n nodeb
NODEA:KB8UVN-1} Routes to: NODEB:KB8UVN-2
> 200 6 1 KB8UVN-2

The leading > indicates the route is presently active, followed by the obsolence counter, port number and neighbor callsign.

For TheNet, this is

n nodeb
NODEA:KB8UVN-1} Routes to: NODEB:KB8UVN-2
> 200 5 0 NODEB:KB8UVN-2

The leading > indicates the route is presently active, followed by the quality, obsolence counter, port (0 = RF, 1 = RS-232/Diode Matrix) and lastly neighbor alias:callsign.

The route calculation here is straight forward:

RouteQuality/256 * 256 = Node Quality

Plugging in the above values, this will be:

200/256 * 256 = 200 or a route quality of 200.