From: ccie2be (ccie2be@nyc.rr.com)
Date: Sun Jun 26 2005 - 19:42:31 GMT-3
Hi guys,
This is an interesting scenario - at least I hadn't thought much about this
previously.
Let's say you have this topology:
IGP R1 nssa R2 area 0 R3
R1 is redist routes from another IGP into OSPF. Can I use the area X range
command on R2 to summarize routes learned from the IGP redist into the nssa
area so that the backbone doesn't have all those specific routes from the
other routing protocol?
And, more generally, do I need to be concerned about any restrictions on
using the area X range command to summarize routes into the backbone area
depending upon what type of stub area is configured?
What I find interesting about this scenario is that typically when I think
about what type of stub area to configure, I'm concerned about what routes
are advertised into the stub area from the backbone.
In this scenario, it's just the opposite. Here the concern is what routes
area advertised from the stub area into the backbone area.
(I don't have access to any routers at the moment to lab this up.
TIA, Tim
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