Forum Discussion
bojan_sukalo_20
Nimbostratus
Jul 17, 2015DHCP relay
Hello,
I want to make a dhcp relay on F5 box.
OS version is 11.6.
F5 is vCMP guest.
The problem is I can see on tcpdump that F5 is relaying request towards DHCP server but the pro...
boneyard
MVP
Jul 22, 2015did you also do this:
Alternate configuration
If the DHCP client subnet includes a BIG-IP system that serves as a hop to the BIG-IP relay agent, you must perform two additional configuration tasks:
You must configure the BIG-IP relay agent to relay the client DHCP requests to the DHCP servers without losing the originating subnet (source) IP address. This originating source IP address is typically a self IP address of the BIG-IP system that resides on the client subnet. You configure the BIG-IP relay agent to preserve the originating source IP address by creating a SNAT that specifies the originating self IP address as both the origin address and the translation address. A SNAT configured in this way prevents the BIG-IP relay agent, before sending the DHCP broadcast message to the DHCP servers, from translating the source IP address of the incoming DHCP request to a different address.
You must add a route (to the BIG-IP relay agent) that specifies the originating source IP address as the destination for DHCP responses. The DHCP servers use this route to send their responses back through the BIG-IP relay agent to the clients.
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