From: RIDNEY_M_LAUDIANO.TTSP@ts.tsuneishi.co.jp
Date: Wed Feb 15 2006 - 22:31:24 GMT-3
OSPF Command and Configuration Handbook by Parkhurst
area area-id range ip-address mask
Purpose: OSPF can summarize OSPF routes from the backbone or Area 0 into a
non-zero OSPF area or from a non-zero area into the backbone. OSPF route
summarization can only occur on an ABR. An ABR is a router that has at
least one interface in Area 0 and at least one interface in a non-zero
OSPF area.
summary-address ip-address mask
Purpose: OSPF can summarize routes that have been redistributed into OSPF.
The summary can be applied to routes redistributed from a dynamic routing
protocol, static routes, and connected routes. The router performing the
redistribution is called an Autonomous System Boundary Router (ASBR). The
summary-address command can be used on an ASBR or an Area Border Router
(ABR). When used on an ABR, only external OSPF routes can be summarized.
- Ridney
Venkatesh Palani <kvpalani@gmail.com> wrote on 02/16/2006 09:06:25 AM:
) Hi Guys,
) I just got confused with these commands I was thinking summary
) is used for
) external routes where as area is used for interarea routes.
) correct me If I
) am wrong and can any one throw more lights on how these could
) be used ( in
) more tricky way then one would expect).
) Thank you,
) venkatesh
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