From: centos-bounces@centos.org [mailto:centos-bounces@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
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