Null Interface

CCNA, networks
What is a Null Interface ? By Atul Sharma What is a Null Interface ? Null interface is not a physical interface. Its a virtual interface where you can route traffic, but want packets destined for a particular network to be dropped. Directing packets to the null0 interface will prevent the router from sending an Internet Control Message Protocol (ICMP) network unreachable message when it receives a packet with an unknown destination. A situation in which you might want to use the null0 interface is when you have configured a default network, but want packets destined for a particular network to be dropped. If a static route is configured for the network to the null0 interface, the packets will be dropped without the ICMP message or without having to configure an…
Read More