You can configure a combined total of 500 DHCP servers (IPv4)
and DHCP relay agents (IPv4 and IPv6) on all firewall models except
for PA-5200 Series and PA-7000 Series firewalls
On PA-5220 firewalls, you can configure a maximum of 500 DHCP
servers and a maximum of 2,048 DHCP relay agents minus the number
of DHCP servers configured. For example, if you configure 500 DHCP
servers, you can configure 1,548 DHCP relay agents.
On PA-5250, PA-5260, and PA-7000 Series firewalls, you can configure
a maximum of 500 DHCP servers, and a maximum of 4,096 DHCP relay
agents minus the number of DHCP servers configured. For example,
if you configure 500 DHCP servers, you can configure 3,596 DHCP
relay agents.