The value of vRtrIfDHCPGiAddressAsSrc specifies whether the DHCP
relay should use the gateway interface address as the source IP
address when communicating with the DHCP server. When it is set
to 'true(1)', the source IP address used to communicate with the DHCP
server is the gateway interface address. When it is 'false', the
source IP is the IP of the egress interface the IP packet goes
out on.