Flushing the linux routing cache
In order to clear the network routing cache in linux the following command is needed.
echo 1 > /proc/sys/net/ipv4/route/flush
Old versions of linux may require the command below instead:
echo -e -n "\\0" > /proc/net/rt_cache
Once this has been done, the kernel routing table cache should now be empty, as shown by the command below:
route -C Kernel IP routing cache Source Destination Gateway Flags Metric Ref Use Iface
Last updated: 21/11/2011