14.10 Commands at a glance
The following is a list of lan related commands commonly used in
$ns_ make-lan nodelist bw delay LL ifq MAC channel phy
Creates a lan from a set of nodes given by <nodelist>. Bandwidth, delay characteristics
along with the link-layer, Interface queue, Mac layer and channel type for the
lan also needs to be defined. Default values used are as follows:
<LL> .. LL
<channel>.. Channel and
$ns_ newLan nodelist BW delay args
This command creates a lan similar to make-lan described above. But this
command can be used for finer control whereas make-lan is a more convinient and
easier command. For example newLan maybe used to create a lan with hierarchical
addresses. See ns/tcl/ex/vlantest-hier.tcl, vlantest-mcst.tcl, lantest.tcl,
mac-test.tcl for usage of newLan. The possible argument types that can be
passed are LL, ifq, MAC, channel, phy and address.
$lannode cost c
This assigns a cost of c/2 to each of the (uni-directional) links in the lan.
Returns the cost of (bi-directional) links in the lan, i.e c.
Internal procedures :
$lannode addNode nodes bw delay LL ifq MAC phy
Lan is implemented as a virtual node. The LanNode mimics a real node and uses
an address (id) from node's address space.
This command adds a list of <nodes> to the lan represented by lannode.
The bandwidth, delay and network characteristics of nodes are given by
the above arguments. This is an internal command used by make-lan and newLan.
Returns the virtual node's id.
Returns virtual nodes's address.
This command creates a given lan layout in nam. This function may be changed
to redefine the lan layout in a different way.
This command always returns 1, since the node here is a virtual node
representing a lan. The corresponding command for base class Node
$node is-lan? always returns a 0.