Symptoms:

• Limitation on using DHCP Relay over VPN
• DHCP Relay not working over the VPN tunnel
• PC not getting an IP address over the VPN tunnel

Facts:

• 3CRTPX5-U-96
• 3CRX506-96
• X5
• X506

Causes:

DHCP relay over VPN allows DHCP to operate between a DHCP client at a remote site and a DHCP server at a different site via a VPN tunnel. If you want to allow a DHCP server at one site to provide IP configuration to clients attached to a remote LAN via VPN, use DHCP relay over VPN. For example, a DHCP server might reside at the headquarters of a company. You can configure the devices in the remote branches to relay DHCP requests to the headquarters device, which in turn relays the requests to the DHCP server.

Fixes: You can only use DHCP relay over VPN when the VPN between the two devices is set up to use Internet Key Exchange (IKE).

• Product(s): TippingPoint, X Family
• Sub Product(s): X505, X506, X5, X506

— David Gonzalez 2021/04/16 17:52