This read-create object sets the customer VLAN ID (C-VID) that a given multicast VLAN (M-VID), identified by zxAnMcastVlanGlbTransMVid in the same row, is globally translated to; a value of 0 means the multicast traffic is translated to untagged packets. Admins configure this when the multicast VLAN used in the network core differs from the VLAN tag subscribers actually expect on their access ports. For example, setting this to 100 for a given M-VID would cause multicast traffic on that M-VID to be re-tagged to C-VID 100 before being delivered globally across the device.