The value of tmnxMcPathVdoPlcyMaxIgmpLatency specifies the maximum
duration from the time a client sends an IGMP join to the time it
receives the first multicast packet.
The value of tmnxMcPathVdoPlcyMaxIgmpLatency is only applicable when
tmnxMcPathVdoPlcyChlType is set to 'default (1)'.