Tmix uses ns-2 to model the TCP-level interaction between two nodes on
the simulated link. To simulate network-level effects of TCP transfer
through the clouds, use Tmix_DelayBox. Tmix_DelayBox is derived from
DelayBox (Chapter ). Tmix_DelayBox simply adds
the ability to specify delays and losses for each connection using a
connection vector file instead of setting up rules for each
source-destination pair. After a connection vector file is specified,
Tmix_DelayBox parses each connection vector to obtain the loss rate and
delay, which are written into the DelayBox flow table. Note that the current version of Tmix_DelayBox does not allow bandwidth limitations as does DelayBox, but that future versions may support this.