netromd - Send and receive NET/ROM routing messages
netromd [-c] [-d] [-i] [-l] [-p pause] [-q quality] [-t interval] [-v]
For a NET/ROM based network to operate correctly, a periodic broadcast of
routing information needs to occur. Typically this occurs once every hour on
every port which is expected to carry NET/ROM traffic. The purpose of
is to send and receive NET/ROM routing broadcasts. To operate
correctly a set of parameters that corresponds to each AX.25 port needs to be
passed to the program. This information is encoded in a configuration file, by
default which is /etc/ax25/nrbroadcast with each line representing one port,
see the manual page for nrbroadcast
To cut down the length of these routing broadcasts, only the information about
the highest quality neighbour for a particular node is transmitted. The
transmission is also limited to those node that have a certain minimum value
in their obsolesence count, this value is decremented every time a routing
broadcast is transmitted, and is refreshed by receiving a routing broadcast
which contains that particular node.
The value of the default quality is traditionally assigned a value that
represents the quality of the radio links on that port. A higher number
representing better radio links with 255 (the maximum) reserved for wire
connections. The practise in the UK is to set the default quality to a low
value, typically 10, and manually set up the trusted neighbouring nodes in the
neighbour list manually. The worst quality for auto-updates value is a way to
filter out low quality (ie distant) nodes.
The verbose flag may be either 0 or 1, representing no and yes. By specifying
no, the program will only generate a routing message containing information
about the node on which it is running, by specifying the yes option, all the
information in the nodes routing tables will be transmitted. The quality
advertised for the other node callsigns on this machine may be set using the
Between each transmission netromd
pauses for five seconds (default) in
order to avoid flooding the channels that it must broadcast on. The value of
this delay is settable with the -p option.
- Forces strict compliance to Software 2000 specifications.
At present this only determines how node mnemonics with lower case
characters will be handled. With compliance enabled mixed case node
mnemonics will be ignored. The default is to accept node mnemonics of
- Switches on debugging messages, the default is off. Logging
must be enabled for them to be output.
- Transmit a routing broadcast immediately, the default is to
wait for the time interval to elapse before transmitting the first routing
- Enables logging of errors and debug messages to the system
log. The default is off.
- -p pause
- Sets the delay between transmissions of individual routing
broadcast packets. The default is five seconds.
- -q quality
- Sets the quality of the subsidiary nodes relative to the
main node. The default is 255.
- -t interval
- The time interval between routing broadcasts, in minutes.
The default is 60 minutes.
- Display the version.
Jonathan Naylor G4KLX <firstname.lastname@example.org>