RADIUS attribute from rfc2865

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Login-LAT-Node

This Attribute indicates the Node with which the user is to be
      automatically connected by LAT.  It MAY be used in Access-Accept
      packets, but only when LAT is specified as the Login-Service.  It
      MAY be used in an Access-Request packet as a hint to the server,
      but the server is not required to honor the hint.

   A summary of the Login-LAT-Node Attribute format is shown below.  The
   fields are transmitted from left to right.

    0                   1                   2
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
   |     Type      |    Length     |  String ...
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

   Type

      35 for Login-LAT-Node.

   Length

      >= 3String

      The String field is one or more octets, and contains the identity
      of the LAT Node to connect the user to.  The LAT Architecture
      allows this string to contain $ (dollar), - (hyphen), . (period),
      _ (underscore), numerics, upper and lower case alphabetics, and
      the ISO Latin-1 character set extension.  All LAT string
      comparisons are case insensitive.

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