adding errors to a LAN

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

hi,

  does anyone know how i can add errors to a LAN ? 
  i used the following :
   
   set loss_module [new ErrorModel/Expo 0.01 time] 
   $ns lossmodel $loss_model $n(0) $n(1)

  however it can only add errors to a simplex or duplex link. How to i add
errors to a 
shared link, for eg in a LAN ?

thanks,
kwang mien