eth0 interface taking a long time to start with many IP's

[vivithemage]

I have 500 ip's assigned to a NIC on my CentOS 6 box. I got each IP to work in it's own VLAN, but when I went to add the range0's which had 253 ip's each, total 500 or so on the box, I go to restart the interface and it takes a very long time to start. This seems new in CentOS 6, as this doesn't seem to be an issue in CentOS 5, is there a way to speed it up? Does CentOS 6 do some sort of check?

[TrevorH]

CentOS 6 issues an arp check for each IP address for duplicate IP detection. You can turn that off if you're sure that there are none (and never will be). Consult /usr/share/doc/initscripts*/sysconfig.txt for how.

[vivithemage]

CentOS 6 issues an arp check for each IP address for duplicate IP detection. You can turn that off if you're sure that there are none (and never will be). Consult /usr/share/doc/initscripts*/sysconfig.txt for how.

Nice, so would I put arp=no from the looks of that doc?

[TrevorH]

The parameter you want is ARPCHECK not ARP and both it and its parameter are case sensitive.

[vivithemage]

ah so

ARPCHECK=no