nicdelay parameter is not respected for Red Hat Enterprise Linux 6.6 installation

Issue

• I tried to install Red Hat Enterprise Linux 6.6 with kickstart file in a customer installation ISO.
• The kickstart file includes a static network information, and an network interface seems to be activated upon the log message.
• But, I saw a nfs mount failure, and it prompt to correct the repository information.
• It can proceed the installation process by just pressing Enter without any change.
• I thought that network was not available actually when it tried the nfs mount.
• I tried nicdelay= boot parameter, but it didn't make any change.
• I tried linksleep= boot parameter as well, but it also didn't make any change.