This object sets the virtual switch ID assigned to a specific chassis table entry, and can only be assigned to one entry at a time since a chassis cannot belong to multiple virtual switches or hold multiple chassis IDs in the same one; a conflicting assignment returns inconsistentValue. An admin sets this when adding a physical chassis into a virtual switch bond. For example, an admin bonding two chassis would assign a matching VsbId to each chassis's entry to associate them into the same virtual switch.