NRBROADCAST(5) Linux Programmer's Manual NRBROADCAST(5)NAME
nrbroadcast - NET/ROM routing broadcast configuration file.
DESCRIPTION
Nrbroadcast is an ASCII file that contains information about each of the physical AX.25 ports that are to have NET/ROM routing broadcasts
transmitted from them.
Each line has the following format, each field being delimited by white space:
port minobs defqual worstqual verbose
The field descriptions are:
port the port name of the AX.25 port to broadcast on.
minobs this is the minimum obsolescence count of a routing table entry to be broadcast on this port.
defqual this is the default quality of an incoming routing broadcast from an unknown neighbour.
worstqual this is the worst quality node received from a routing broadcast that will be added to our routing table.
verbose whether the routes to all of my nodes in my routing table, or just the nodes resident on my machine are to be broad-
cast.
FILES
/etc/ax25/nrbroadcast
/etc/ax25/axports
SEE ALSO call(1), netrom(4), axports(5), netromd(8), nrparms(8).
Linux 2 August 1996 NRBROADCAST(5)
Check Out this Related Man Page
NETROMD(8) Linux System Managers Manual NETROMD(8)NAME
netromd - Send and receive NET/ROM routing messages
SYNOPSIS
netromd [-c] [-d] [-i] [-l] [-p pause] [-q quality] [-t interval] [-v]
DESCRIPTION
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 netromd is to send and receive NET/ROM routing broad-
casts. 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(5).
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 contain-
ing 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 -q option.
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.
OPTIONS -c 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 mixed case.
-d Switches on debugging messages, the default is off. Logging must be enabled for them to be output.
-i Transmit a routing broadcast immediately, the default is to wait for the time interval to elapse before transmitting the
first routing broadcast.
-l 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.
-v Display the version.
FILES
/proc/net/nr_neigh
/proc/net/nr_nodes
/etc/ax25/axports
/etc/ax25/nrbroadcast
SEE ALSO ax25(4), axports(5), nrbroadcast(5), netrom(4), nrparms(8).
AUTHOR
Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>
Linux 20 August 1996 NETROMD(8)