The original question was CAN you configure ip directed-broadcast on serial interfaces. The technically correct answer is YES you CAN configure this. But I see very little reason to do so. The directed-broadcast command controls whether the router will take an incoming directed broadcast (packet with destination address of the broadcast address of the local segment) and forward it with a layer 2 broadcast address. On serial interfaces there is not much point in configuring this where there is only one neighbor. (Perhaps a Frame Relay multipoint interface might be an exception)
When I was first learning about Cisco I thought that the directed-broadcast command would enable forwarding a directed broadcast toward some remote destination (and in that context configuring it on serial interfaces makes sense). But I soon learned that this was a mistaken understanding. A directed broadcast toward a remote destination will always be forwarded. The directed-broadcast command only affects broadcasts on the local subnet.
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...