sdf,

  To clarify, the fwd address indeed describes a
  router in another AS, but, at the same time, the
  address needs to belong to a subnet within the
  local OSPF domain so other routers can calculate
  a path to it.

--
Alex Zinin
Thursday, August 02, 2001, 11:22:14 PM, sdf sdaf wrote:
> Hi...
> According to RFC2328 16.5 case:1
>       if the router is an area border router attached
> to one  or more transit areas, the calculation in
> Section 16.3 must be run again for the single
> destination.  If the results of these calculations
> have changed the cost/path to an AS boundary router
> (as would be the case for a Type 4 summary-LSA) or to
> any forwarding addresses, all AS-external-LSAs will
> have to be reexamined by rerunning the calculationin
> Section 16.4.
> But in RFC 2328 section 12.4.4.1..
>  "Note that when the forwarding address field is non-
> zero, it should point to a router belonging to
>  another Autonomous System"
> Actually in inter area calculation we can find out
> destination inside AS.
> can anybody explain how we can find out the change in
> forwarding address in in inter area calculation..
> thanks in advance..
> kannan
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