Overview of Blackhole routes

Networking switches drop the received packet destined for blackhole routes without logging any packet information. Information like source IP, destination IP, VlanID and Port ID of the packets destined for the configured static blackhole routes is logged with this feature.

A static blackhole route is a route manually configured, on a switch, to drop packets destined for a particular network/IP address as it can be configured to a host as well as to a network. The user is able to set up the dropping of particular packets destined for a given IP address by enabling or disabling the route. Since all the packets received on the blackhole route are being logged, there is a performance impact and the exact performance numbers will be evaluated.

A new debug type is also introduced with this feature to log blackhole debug messages.