Links can now be named:

set link1 [$ns duplex-link $node0 $node1 100Mb 100ms DropTail]

tb-set-link-loss can now either be

tb-set-link-loss $node0 $node1 0.05

OR

tb-set-link-loss $node0 $link1 0.05

There is a new command, tb-set-ip-link:

tb-set-ip-link $node0 $link0 192.0.0.4

and tb-set-ip-lan:

tb-set-ip-lan $node $mylan 192.0.1.2

--

WARNING: We are no longer backwards compatible with the old tb command
syntax.  The old syntax does not support any of the new changes and will
break when #TB set-lan-loss or #TB set-ip-interface is used.