Some devices implement a form of IGMP or MLD proxying
whereby memberships learned on the interface represented by
this row, cause Host Membership Reports to be sent on the
interface whose ifIndex value is given by this object.
Such a device would implement the hwMgmdV2RouterBaseMibGroup
only on its router interfaces (those interfaces with
non-zero hwMgmdRouterInterfaceProxyIfIndex). Typically, the
value of this object is 0, indicating that no proxying is
being done. This object MAY be
modified under any rowstatus condition.