Betr.: [CentOS] Multiple IP Addresses in a single NIC

Hi,

You need to issue two commands:

/sbin/ifconfig eth0:0 xxx.xxx.xxx.xxx
/sbin/route add -host xxx.xxx.xxx.xxx dev eth0

For example:

/sbin/ifconfig eth0:0 172.16.1.199
/sbin/route add -host 172.16.1.199 dev eth0

You can even assign multiple aliases to one NIC (One of my servers has about 10 ip addresses):

For example:

/sbin/ifconfig eth0:0 172.16.1.199
/sbin/route add -host 172.16.1.199 dev eth0

/sbin/ifconfig eth0:1 172.16.1.198
/sbin/route add -host 172.16.1.198 dev eth0

/sbin/ifconfig eth0:2 172.16.1.197
/sbin/route add -host 172.16.1.197 dev eth0

and so on.....

You should write an startup script to execute these commands at boot time, because after a reboot the aliases are forgotten.









Thom van der Boon
E-Mail: Thom.van.der.Boon at vdb.nl

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Tel.: +31 (0)10 4272727
Fax: +31 (0)10 4736620
E-Mail: info at vdb.nl
Home Page: http://www.vdb.nl/

>>> joao.c.medeiros at gmail.com 24.06.2005 00:28:01 >>>
Hi all,

I've been trying to add a second ip address to one of my network cards in my
CentOS box. I've defined the alias on top of eth1 which has become eth1:1
with a different ip address.

I can ping the new ip address both from my linux box as well as from my
Windoze desktop, however I can only access my Apache web server setup as a
virtual host from within the Linux box. If I try to access it from the
desktop I get an "Operation Timeout..." error.

I'm sure I missed out something really basic. Browsed Google and the CentOS
mailing list (plus RH) and can't figure it out. Networking is not one of my
best subjects... Someone care to shed some light or point me to a fairly
decent link out there which covers this topic?

TIA,
--JM

João Medeiros
Linux User 381318

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