I put in a new ICX7250 lately that was acting as a small core for a very small facility. They had a few Cisco IP phones (which are great) on the network, and the core switch was giving out DHCP for them. So, when we replaced the switch with the ICX7250, we needed to accommodate for that. Below is the DHCP config I did for the IP phones. Note the two bold commands. These two are for telling the IP phone to look at the CUCM for its TFTP files.
ip dhcp-server pool voice
excluded-address 192.168.1.1 192.168.1.40
lease 1 0 0
network 192.168.1.0 255.255.255.0
vendor-class ascii 150
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