The reason router D is being seen as both an ABR and an ASBR is that you configured area 20 as NSSA. Router D does the type 7 to type 5 translation and is therefore considered as the ASBR for these external routes.
It is also normal in this case that router H is not seen as an ASBR outside of area 20.
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We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
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IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
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In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...