IP: verbose route monitoring

configname: CONFIG_IP_ROUTE_VERBOSE

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>IP: verbose route monitoring
In linux kernel since version 2.6.12  
If you say Y here, which is recommended, then the kernel will print
verbose messages regarding the routing, for example warnings about
received packets which look strange and could be evidence of an
attack or a misconfigured system somewhere. The information is
handled by the klogd daemon which is responsible for kernel messages
("man klogd").