– Sent to an area to advertise routes belonging to other areas
- Also used by the ABR to advertise subnets that are part of another area to the backbone area
- Network summary LSA also contains default routes
– ABR includes cost from itself to the network it is advertising in the LSA
– When the ABR advertises the summary LSA to routers within an area, the internal routers do not run SPF again
- Internal routers just add cost from them to the ABR
ASBR Summary LSA (Type 4)
– Advertised by the ABR
– Contains information about the ASBR Router
– Always the advertised address will be a host not network
- Used in conjunction with Type 5 LSA
So, essentially Type 3 is used to advertise routes external to an area (including default routes) whereas the Type 4 is used to propagate the information about the ASBR router. When the internal routers get routes distributed via another routing process, using Type 4 LSA, they determine the router that has redistributed these routes.
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
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
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
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