Traffic drop on a VSX LAG interface

Action

Verify that the VSX LAG interface is in-sync with both peer and down stream switches by entering:
```
switch# show lacp interfaces multi-chassis
```
Verify that the VLAN membership of the VSX is the same on both VSX switches by entering:
```
switch# show vsx config-consistency lacp <LAG-NAME>
```
Verify that all MAC addresses are programmed correctly on both VSX switches by entering:
```
switch# show mac-address-table
switch# show mac-address-table count
```