OPTIONS TO INJECT DEFAULT ROUTE INTO NSSA

From: Carlos Trujillo Jimenez (nergal888@hotmail.com)
Date: Mon Sep 10 2007 - 19:33:04 ART


Hi all.

I have a NSSA area, the routers from the NSSA dont need reachability
information about the external prefixes, that means I must inject a default
route for the external prefixes reachability.

I have two options to do it.

at the area border router:

area 23 nssa no-summary

or

area 23 nssa defalut-information-originate

Is there any significant difference between both options?? both works, by a
show ip route at the internal routers of the nssa area I can see an external
IA default route with both commands, theres is no difference, any ideas when
one of these options can and cannot be used???



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