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netrom
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netrom <subcommands>
These commands influence netrom behavior.
netrom acktime [<milliseconds>]
(B) Displays or sets the ack delay timer, similarly to ax25 t2.
Default is 8000ms (i.e. 8 seconds).
netrom alias <aliascall>
This sets the netrom alias call for this station. Other stations
can connect to the ax25 callsign and to the Netrom alias (when
set). The alias is broadcast with a Netrom broadcast. If netrom
is not activated, you can use the 'ax25 alias' command to set the
alias callsign, such that users can still connect to the alias,
even though netrom activities are not allowed.
netrom bcnodes <iface>
Initiates an immediate broadcast of nodelist on <iface>. Verbose
behavior is controlled by the 'netrom interface' command.
netrom bcpoll <iface>
Initiates a poll sent to the named interface. This poll will
request a netrom routes broadcast from other nodes, so that the
routing table can be updated. This is automatically done any time
an interface is activated (or changed) for netrom. This should
speed up route discovery at startup. This is NOT currently
implemented in Thenet or Net/Rom nodes, but works with Data
Engines running JNOS40 or with systems running JNOS v1.05 or
later.
netrom choke [<milliseconds>]
(B) Display or set the time breaking a send choke. Choke is the
term netrom uses for flow control conditions. Default is 180000
ms (180 seconds.)
netrom derate [ON|off]
(B) Display or set automatic derating of netrom routes on link
failure. Default is on.
netrom hidden [on|OFF]
Display or set the hidden node flag. Nodes with aliases starting
with the '#' character are displayed using the command 'N *'.
Default is OFF.
netrom interface [<iface> <quality> [n]]
Activate <iface> as a netrom interface. <quality> can be between
1 and 255. Interfaces are activated using verbose routes
broadcasting by default, meaning that they broadcast all known
routes. This can be changed by adding the optional 'n' parameter
to the command. Then only the system itself will be announced in
a broadcast, not the known routes.
If the paclen of the interface is smaller then the netrom mtu +
20, then the netrom mtu will be set to paclen-20 . This is to
avoid fragmentation, causing incompatibilities with none-NOS
based Netrom nodes. See the 'ifconfig <iface> paclen' command for
more.
If <iface> has already been activated as a netrom interface, re-
issuing the command will set <quality> and [n] to the new values.
'netrom interface' will show the currently active netrom
interface.
Each time an interface is activated or changed, a broadcast poll
will be sent out on the interface. This minimizes the route
discovery time at startup, and will update routes when the
interface quality has changed.
netrom interface <iface> <quality> [<min-bc-quality>] {JNOS40}
Set or display the netrom interface(s) for the node. This
command is essentially the same as the command for JNOS.
Only nodes of min-bc-quality and better will be broadcast in a
nodes boradcast on this interface. If <min-bc-quality> is not
set (no value assigned), then the 'netrom minquality' value is
used. If <min-bc-quality> = 0, then no nodes are broadcast
except this one (same as 'n' parameter above.)
Examples:
netrom interface ax0 224 180 -> nodes >= 180 are broadcast
netrom interface ax0 224 0 -> only ourself is broadcast
netrom interface ax0 224 -> nodes >= 'minquality' are
broadcast
netrom irtt [<milliseconds>]
(B) Display or set the initial round trip time. Default is
45000ms, i.e. 45 seconds.
netrom kick <nrcb>
Give the control block a kick to get activity going again.
netrom load
Retrieves the last set of netrom destination data saved with the
'netrom save' command.
netrom minquality [<minqual>]
(B) Display or set the minimum quality for recognizing a node
entry. Entry's below this value are not considered valuable for
usage. Default is 50.
netrom mycall <call>
Displays or sets the call to be used by the netrom interface.
Note: this is a shortcut for the 'ifconfig netrom linkaddress'
command. It defaults to the 'ax25 mycall' value.
netrom neighbor
Display all known netrom neighbors.
netrom nodefilter <subcommands>
Manipulate node filtering.
netrom nodefilter add <neighbor> <iface>
Add <neighbor> on port <iface> to the filter table. See the
'netrom nodefilter mode' command to determine the manner to
handle node updates from <neighbor>.
netrom nodefilter mode [none|accept|reject]
Display or set the initial node filter scheme. 'none' accepts
all netrom routes and is the default. 'accept' accepts routes
only from nodes defined with the 'netrom nodefilter add'
command. 'reject' does not accept routes from any nodes
defined with 'netrom nodefilter add'
netrom nodefilter drop <neighbor> <iface>
Delete the node <neighbor> on interface <iface> from the
filter table.
netrom nodetimer [<seconds>]
(B) Display or set the interval to transmit the nodes list. If
you want to use other than the default, you must first attach the
netrom interface with 'attach netrom' and then set the new
nodetimer value. Default is 1800 seconds (half an hour).
netrom obsoinit [#}
(B) Display or set the initial obsolescense count for direct
routes (Routes table entries) to other systems. Default is 6
netrom obsominbc [#]
(B) Display or set the minimum obsolescense count a route should
have to be included in routes broadcasts originating from this
system. Default is 4.
netrom obsotimer [<seconds>]
(B) Display or set the time a node obsolescence count gets
decremented. If you want to use other than the default, you must
first attach the netrom interface with 'attach netrom' and then
set the new obsotimer value. Default is 1800 seconds.
netrom promiscuous [OFF|on]
(B) Enables nodes with a path quality greater than defined with
minquality. If on, all nodes are received regardless of
nodefilter mode. Default is off.
netrom qlimit [<nnnn>]
(B) Display or set the maximum queue limit for choke to occur.
Similar to ax25 window. Default is 512 bytes.
netrom reset <nrcb>
Remove the control block. You can find the control block with
the 'netrom status' or 'socket' commands.
netrom retries [<nn>]
Display or set the maximum number of retries on connect,
disconnect or data. Default is 3.
netrom route <subcommands>
Netrom routing commands. Routes can be marked as 3 types in the
various route displays:
'P' - a permanent route set with the 'netrom route add'
command
'B' - a route received through a nodes broadcast from a
neighbor node
'R' - a recorded route from an incoming packet from a not
previously known netrom node
netrom route add <alias> <call> <iface> <quality> <neighbor>
Add a permanent netrom route. The new route is to netrom
system <alias> with call <call>, and the route is on interface
<iface> with quality <quality> via the neighbor <neighbor>.
netrom route add salem af7s-1 port1 178 k7uyx-1
A route to a direct neighbor looks like:
netrom route add crv k7uyx-1 port1 192 k7uyx-1
netrom route drop <destination> <neighbor> <iface>
Delete the netrom route to call <destination> via neighbor
<neighbor> on <iface>.
netrom route info [<destination>]
Display the route a packet would take to get to <destination>.
If <destination> is not given, information about all known
netrom nodes is displayed. 'netrom route info' and 'netrom
route info *' are equivalent commands.
netrom status
Display all netrom connections.
netrom tdisc [secs]
(B) Display or set the Netrom Link "redundancy" timer. Value is
in seconds. When no data exchange has happened during this time
the link is reset and closed. Default is 900 seconds (15
minutes).
netrom timertype [exponential|LINEAR]
(B) Displays or sets the type of backoff used on netrom retries.
Default is linear.
netrom ttl [<hops>]
(B) Display or set the maximum number of hops a frame might take
before being discarded. Default is 10.
netrom window [<frames>]
(B) Display or set the size of the sliding window. This is the
largest send and receive window we might negotiate. Default is
2.