I have a series of 3550 switches between a core and edge router that are passing all traffic at Layer 2 (no Layer 3 services enabled on the 3550's). On each of the uplink ports between switches, we have "switchport block multicast" enabled because the network is being used for a lot of multicast traffic.
We are having difficulties forming OSPF adjacencies between the two routers, but IP traffic passes with no trouble. The devices are in their own VLAN across the switch. Thus, my question. Could it be that blocking unknown multicast is also filtering the OSPF LSA's riding on that VLAN?
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...