Why is area 0 range ip_address mask so unreliable?

From: Thomas Larus (tlarus@xxxxxxx)
Date: Mon Jun 10 2002 - 23:36:50 GMT-3


   
Why can we summarize area 0 addresses sometimes and not others. Is it
perhaps that we are sometimes trying to summarize an address that is
directly connected. There are some people who even have said that you
cannot use summarize area 0 addresses.

If you can't, then how in the world can you ever summarize the classic VLSM
area 0 frame-relay cloud?

Also, regarding the other night's discussion of the trick of redistributing
connected to get the loopback into OSPF and using summary-address to make it
a length that IGRP and RIP could handle, does have its downside in that, of
course, you might not want to redistribute all the other connecteds on the
router into your OSPF domain.



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