Tap agents are able to send and receive packets to/from an
associated Network object.
Assuming a network object $netobj refers to a network
object, a tap agent is configured using the network method:
set a0 [new Agent/Tap]
$a0 network $netobj
$a0 set fid_ 26
$a0 set prio_ 2
$ns connect $a0 $a1
Note that the configuration of the flow ID and priority are
handled through the Agent base class.
The purpose of setting the flow id field in the common header
is to label packets belonging to particular flows of live data.
Such packets can be differentially treated with respect
to drops, reorderings, etc.
The connect method instructs agent $a0 to send
its live traffic to the $a1 agent via the current
route through the simulated topology.