Hello Rushi,
I went through kb which is for QFX. Wondering how DHCP server i.e. 20.0.0.2 is reachable from VRF.inet.0. I m trying to relate configs to my vMX. Added some configs regarding forwarding-options from kb to my earlier config but it didn't work. Config is something like this.
manoz@vmx1# show | display set
set version 16.1R4.7
set system host-name vmx1
set interfaces ge-0/0/1 unit 0 family inet address 10.0.0.1/24
set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.1/24
set forwarding-options dhcp-relay forward-only-replies
set routing-options interface-routes rib-group inet DHCP-RELAY
set routing-options rib-groups DHCP-RELAY import-rib inet.0
set routing-options rib-groups DHCP-RELAY import-rib DHCP-RELAY.inet.0
set routing-instances DHCP-RELAY instance-type virtual-router
set routing-instances DHCP-RELAY interface ge-0/0/1.0
set routing-instances DHCP-RELAY routing-options interface-routes rib-group inet DHCP-RELAY
set routing-instances DHCP-RELAY forwarding-options dhcp-relay overrides no-allow-snooped-clients
set routing-instances DHCP-RELAY forwarding-options dhcp-relay forward-only routing-instance default
set routing-instances DHCP-RELAY forwarding-options dhcp-relay server-group DHCP-RELAY 192.168.0.2
set routing-instances DHCP-RELAY forwarding-options dhcp-relay active-server-group DHCP-RELAY
set routing-instances DHCP-RELAY forwarding-options dhcp-relay route-suppression destination
set routing-instances DHCP-RELAY forwarding-options dhcp-relay group DHCP-RELAY active-server-group DHCP-RELAY
set routing-instances DHCP-RELAY forwarding-options dhcp-relay group DHCP-RELAY interface ge-0/0/1.0