inserting a new link layer

[Chan Kwang Mien <Kwang-Mien.Chan.GP@icn.siemens.de>]

	hi,

	      i would like to ask abt adding a new link layer. According to
the NS documentation, there isn�t anything said about how to add a new link
layer. can you tell me briefly what i should do to add a new link layer or
is there an example which i can download and try.

	      thanks for your help. :)

	rgds,
	kwang mien