Grep for IP addresses

#grep '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'  logfile


Its easy if we put it as an alias in $HOME/.bashrc file. 


alias ipgrep="grep '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'"