The value of vRtrIfDHCPProxyLTRadiusOverride specifies whether or not
the lease time provided by the RADIUS server is presented to the DHCP
client.
By default the proxy-server will always make use of
vRtrIfDHCPProxyLeaseTime, regardless of what lease time information is
provided from the RADIUS server.
When vRtrIfDHCPProxyLTRadiusOverride is set to 'true(1)', the
proxy-server will use the lease time information provided by the
RADIUS server, regardless of the configured one.