either the command router-id was used or in the past there was an interface on the router with that IP address, there is no default value for the OSPF router-id if you try to configure OSPF on a router with no valid IP address configured you would see an error message telling that OSPF process failed to start for the lack of a valid RID on the box.
Again, it is really important to fix first. Understanding what happened in the past can be done later
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
use of this technology, and recommendati...