Enable a firewall interface to transmit DHCP messages
between clients and servers.
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To enable a firewall interface to transmit
DHCP messages between clients and servers,
you must configure the firewall as a DHCP relay agent. The interface can forward
messages to a maximum of eight external IPv4 DHCP servers. A client
DHCPDISCOVER message is sent to all configured
servers, and the
DHCPOFFER message of the first server
that responds is relayed back to the requesting client.
You can configure a combined total of 500 DHCP servers and DHCP relay agents 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.