[Q] how to set virtual IP on AS 4

[Gaddis, Jeremy L.]

On Wed, 14 Feb 2007, m.roth2006 at rcn.com wrote:
>> eth0:0 should typically work just fine.  Does Webmin do fun things with it
>> like eat up your eth0 settings instead? :)
>>
> Nope - it simply won't allow it. I mentioned it to the other sysadmin I work with, and he said eth0:0 was a bad idea, that it would likely got for eth0 itself.

What won't allow it?  Webmin or RH?  Can you provide something more 
specific than "he said eth0:0 was a bad idea"?  Years of firsthand 
experience using eth0:0 tells me to call "bullshit" on this one.

[jlgaddis at blwww1 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)

[jlgaddis at blwww1 ~]$ /sbin/ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:17:A4:11:D5:2E
           inet addr:X.Y.Z.124  Bcast:X.Y.Z.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:47501800 errors:0 dropped:0 overruns:0 frame:0
           TX packets:52624967 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:2820171777 (2.6 GiB)  TX bytes:163207891 (155.6 MiB)
           Interrupt:201

[jlgaddis at blwww1 ~]$ /sbin/ifconfig eth0:0
eth0:0    Link encap:Ethernet  HWaddr 00:17:A4:11:D5:2E
           inet addr:X.Y.Z.65  Bcast:X.Y.Z.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           Interrupt:201

"X.Y.Z.65" is a virtual IP shared by a pair of servers clustered using 
heartbeat.  This has been running in production since August with exactly 
zero issues.

-- 
Jeremy L. Gaddis, MCP, GCWN             jeremy at linuxwiz.net
LinuxWiz Consulting                     http://linuxwiz.net