Constant DHCP_SERVER_CLIENT_ID_SIZE 

pub const DHCP_SERVER_CLIENT_ID_SIZE: usize = raw::DHCP_SERVER_CLIENT_ID_SIZE; // 24usize

Longest DHCP client identifier a server lease can store, in bytes.

Only used with the dhcpv4-server feature. A client sending a longer identifier is identified by its hardware address instead.

This is a limit with and without alloc. Default: 24.