How to config dhcpd.conf in RHEL server 6.1
 

Hi All,
i want to add some if else sentence in dhcpd.conf, but dhcpd failed to start, and report error " else ", could sentence like "if else" be used in dhcpd.conf?

It would be good to see your conf file and the exact error msg. This page goes through all the options pretty thoroughly http://linux.die.net/man/5/dhcpd.conf.
You can use 'match if' ... I don't think(?) there's an else clause, I think you just keep using 'match if' until it matches (like a 'switch' statement) or hits last/default block.