DESCRIPTION

``dtn'' scheme configuration commands are passed to dtn2admin either in a file of text lines or interactively at dtn2admin's command prompt (:). Commands are interpreted line-by line, with exactly one command per line.

``dtn'' scheme configuration commands mainly establish static routing rules for forwarding bundles to ``dtn''-scheme destination endpoints, identified by node names and demux names.

Static routes are expressed as plans in the ``dtn''-scheme routing database. A plan that is established for a given node name associates a default routing directive with the named node, and that default directive may be overridden by more narrowly scoped rules in specific circumstances: a different directive may apply when the destination endpoint ID specifies a particular demux name.

Each directive is a string of one of two possible forms:

f endpoint_ID

...or...

x protocol_name/outduct_name[,destination_induct_name],

The former form signifies that the bundle is to be forwarded to the indicated endpoint, requiring that it be re-queued for processing by the forwarder for that endpoint (which might, but need not, be identified by another ``dtn''-scheme endpoint ID). The latter form signifies that the bundle is to be queued for transmission via the indicated convergence layer protocol outduct. destination_induct_name must be provided when the indicated outduct is ``promiscuous'', i.e., not configured for transmission only to a single neighboring node; this is protocol-specific.

The node names and demux names cited in dtn2rc plans and overriding rules may be ``wild-carded''. That is, when the last character of a node name is either '*' or '~' (these two wild-card characters are equivalent for this purpose), the plan or rule applies to all nodes whose names are identical to the wild-carded node name up to the wild-card character; wild-carded demux names function in the same way. For example, a bundle whose destination EID's node name is ``//foghorn'' would be routed by plans citing the following node names: ``//foghorn'', ``//fogh*'', ``//fog~'', ``//*''. When multiple plans are all applicable to the same destination EID, the one citing the longest (i.e., most narrowly targeted) node name will be applied; when multiple rules overriding the same plan are all applicable to the same destination EID, the one citing the longest demux name will be applied.

The formats and effects of the DTN scheme configuration commands are described below.

GENERAL COMMANDS

?

The help command. This will display a listing of the commands and their formats. It is the same as the h command.

#

Comment line. Lines beginning with # are not interpreted.

e { 1 | 0 }

Echo control. Setting echo to 1 causes all output printed by dtn2admin to be logged as well as sent to stdout. Setting echo to 0 disables this behavior.

v

Version number. Prints out the version of ION currently installed. HINT: combine with e 1 command to log the version number at startup.

h

The help command. This will display a listing of the commands and their formats. It is the same as the ? command.

PLAN COMMANDS

a plan node_name default_directive

The add plan command. This command establishes a static route for the bundles destined for the node identified by node_name. A general plan must be in place for a node before any more specific routing rules are declared.

d plan node_name

The delete plan command. This command deletes the static route for the node identified by node_name, including all associated rules.

i plan node_name

This command will print information (the default directive and all specific rules) about the static route for the node identified by node_name.

l plan

This command lists all static routes established in the DTN database for the local node.

RULE COMMANDS

a rule node_name demux_name directive

The add rule command. This command establishes a rule, i.e., a directive that overrides the default directive of the plan for the node identified by node_name in the event that the demux name of the subject bundle's destination endpoint ID matches demux_name.

c rule node_name demux_name directive

The change rule command. This command changes the directive for the indicated rule.

d rule node_name demux_name

The delete rule command. This command deletes the rule identified by node_name and demux_name.

i rule node_name demux_name

This command will print information (the directive) about the rule identified by node_name and demux_name.

l rule node_name

This command lists all rules in the plan for the indicated node.

EXAMPLES

a plan //bbn2 f ipn:8.41

Declares a static route from the local node to node ``//bbn2''. By default, any bundle destined for any endpoint whose node name is ``//bbn2'' will be forwarded to endpoint ``ipn:8.41''.

a plan //mitre1 x ltp/6

Declares a static route from the local node to node ``//mitre1''. By default, any bundle destined for any endpoint whose node name is ``mitre1'' will be queued for transmission on LTP outduct 6.

a rule //mitre1 fwd x ltp/18

Declares an overriding static routing rule for any bundle destined for node ``//mitre1'' whose destination demux name is ``fwd''. Each such bundle must be queued for transmission on LTP outduct 18 rather than the default (LTP outduct 6).