All of those commands relate to NetFlow functionality and the removal of them will impact collection of NetFlow statistics. If,however, you are not interested in NetFlow anymore, it should be safe to remove them. Even if you are using NetFlow, removing these command will not hamper the router; it will only hamper your ability to collect NetFlow data.
The ip directed-broadcast command enables forwarding of directed broadcast. For example if a router interface had 172.16.4.1 255.255.255.0 and received a packet addresses to 172.16.4.255 that would be a directed broadcast. Should the router forward this onto the local subnet as a broadcast? In current versions of IOS the forwarding of directed broadcasts is disabled by defualt. This command enables forwarding of directed broadcasts.
Directed broadcast has some implications from a security perspective and in general I believe that disabling directed broadcasts is appropriate in most networks. There are some situations where you may need this functionality. So the command is there to enable it.
I would not expect directed broadcast to have much impact on the router. It might have more impact on the stations on the LAN interfaces which may see an increase in broadcast traffic.
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 custome...