From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Ray Leventhal > > Karanbir Singh wrote: > > Ray Leventhal wrote: > >> Hi all, > >> > >> I need to (quickly!grrr) update IP addresses for which a > given machine > >> will answer. > > > > for f in 10 11 30 31 13 15 20 21 22 ; do ip addr add dev eth0 > > xx.xx.xx.${f}/24 ; done; ip addr ls; ip route ls; > > > > check firewall to make sure traffic is allowed in/out for those IP's > > > > > Thank you very much, but please forgive my ignorance...and allow me to > explain the entire situation. > > The server I'm adding IPs to is in one /24, the ips I'm adding are in > another /24 (which is why I specified the netmask in the > /sbin/ifconfig > statement, or it'd have auto-chosen 255.255.0.0) > I'm not sure where/when/how to execute what you've suggested. Again, > forgive my ignorance, but if you'd explain, I'd be grateful. You will need to add the routes for the other subnet in your routing table as such. route add -net XX.XX.XX.0 netmask 255.255.255.0 eth0 I believe there is a place to add static routes in one of the startup scripts (besides rc.local), but forget where it is, I think if you configure ifcfg-eth0:X sub-interfaces scripts ifup will create these routes. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.