topic DHCP Relay Source IP Address Behavior in Next-Generation Firewall Discussions

DHCP Relay Source IP Address Behavior

R.Tabira — Thu, 15 Oct 2026 07:10:21 GMT

Attention: Global TPM team,

Could you please confirm the following DHCP Relay behavior?

When a firewall acts as a DHCP Relay agent and forwards DHCPDISCOVER messages to a DHCP server as unicast packets, is the source IP address the IP address of the interface configured as the DHCP Relay agent?

Also, if available, could you please share any public documentation or KB that explicitly describes this behavior?

Thank you.

Re: DHCP Relay Source IP Address Behavior

R.Tabira — Wed, 21 Oct 2026 08:03:39 GMT

Attention: Global TPM team,

I would like to kindly follow up on this inquiry.

We have received a follow-up request from our customer and would appreciate any update regarding this question.

Could you please provide an update when you have a chance?

Thank you for your support.

Best Regards,