zyMldSnoopingProxyUpstreamVlanRobustness 1.3.6.1.4.1.890.1.15.3.51.3.6.1.4

The Robustness Variable for the Upwnstream part on a particular VLAN. The Robustness Variable allows tuning for the expected packet loss on a subnet. If a subnet is expected to be lossy, the Robustness Variable may be increased.