ifup/ifdown read your sysconfig/network-scripts/ifcfg-eth# config. ifconfig does not, so must be told how to configure the nic usually. On Mon, Feb 3, 2014 at 3:30 PM, mcclnx mcc <mcclnx at yahoo.com.tw> wrote: > I and testing command line to up and down ethernet connection. > > if I perform following, client can not re-connect. > ifconfig eth0 down > ifconfig eth0 up > > if I use following, client can re-connect: > ifconfig eth0 down > ifup eth0 > > What difference between "ifconfig up" and "ifup"? > > thanks. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- Billy Crook * Network and Security Administrator * RiskAnalytics, LLC