The value of tmnxMcacLagPortsDown specifies the configured number
of ports in a lag group that are down.
If the number of ports available in the lag is reduced by the
number of ports configured for tmnxMcacLagPortsDown object then
bandwidth allowed for bundle will be updated to the value of
tmnxMcacLevelBW indexed by tmnxMcacLagBundleLevel value.