If your edge router is an Area Border Router and each tunnel is in a different OSPF area, you can filter type 3 LSAs between areas on the edge router using several techniques, the most flexible of which is the "area x filter-list prefix-name [in | out ]".
If the tunnels are not in distinct OSPF areas, you may want to use a different routing protocol, such as EIGRP, over the tunnels, where you could use distribute-lists on the edge router to filter traffic between the tunnels.
If you need to use OSPF over the WAN, you could set up the OSPF area associated with the WAN as a totally stubby area. Assuming the edge router is an ABR, it will advertise just a default route to the remote sites. The routes advertised to the edge router from the remote sites can be filtered with the "area x filter-list" before they enter the OSPF backbone.
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...