Description: List of interfaces which an user can access.  The interfaces
 in the list are separated either by  space(s).

 Each interface is represented as follows:
 [/[:channel-range>[:]]]

 where each range above has the follog syntax:
  = { * |  | - }

If the optional elements (,,etc) are
not specified they default to '*', which denotes all values.
 is always less than . 

If '*' or range is specified for an element then all following 
elements MUST be wildcard enrtries 

The chassis as an interface can also be included in the list and 
is represented by the key-word 'chassis'

Valid interface examples:
        *       - same as */*/*/*
        5-6/*
        chassis
        5/3-5/*
        5/3/2-4
Invalid interface Eg: 
        5/*/3