If the Vlan has Wan Routing enabled, this object
can be used to specify whether this interface is
a Frame Relay service or a PPP service. This will
be used to determine whether the slot/port/vc or
PeerId fields are applicable to this entry. A value
of 1 implies that this field is not used. (The
interface is not a WAN interface or the filter is
not being applied to a specific VC or PeerId.) A
value of 2 indicates that this is a Frame Relay service
in which case the slot/port/vc fields can be used to
apply the filter to a specific VC. A value of 3
indicates that this is a PPP service and the Peer ID
field may be used.