Here is how to configure DHCP relay on the QFX platform.
1. Define a DHCP server group with DHCP servers IP address(es) :
set forwarding-options dhcp-relay server-group <server-group-name> <ip.address>
Example : If you want to name the group as “PRD-dhcpSrv” and the IP of the server is 10.1.1.10 :
set forwarding-options dhcp-relay server-group PRD-dhcpSrv 10.1.1.10
Note : You can add as many DHCP server as you want if you have clustered DHCP, just repeat the same statement with their respective DHCP server addresses.
2. Create a relay group, which you will map to the server-group defined above :
set forwarding-options dhcp-relay group <relay-group-name> active-server-group <server-group-name>
Example : If your relay group name is “PRD” and your server group name is “PRD-dhcpSrv” :
set forwarding-options dhcp-relay group PRD active-server-group PRD-dhcpSrv
3. Configure the relay group to the desired interface :
set forwarding-options dhcp-relay group PRD interface irb.0
Note : Repeat the statement above to as many interface as you require.