citapStreamInterface 1.3.6.1.4.1.9.9.394.1.1.2.1.1

The ifIndex value of the interface over which traffic to be intercepted is received or transmitted. The interface may be physical or virtual. If this is the only parameter specified, and it is other than -2, -1 or 0, all traffic on the selected interface will be chosen. If the value is zero, matching traffic may be received or transmitted on any interface. Additional selection parameters must be selected to limit the scope of traffic intercepted. This is most useful on non-routing platforms or on intercepts placed elsewhere than a subscriber interface. If the value is -1, one or both of citapStreamDestinationAddress and citapStreamSourceAddress must be specified with prefix length greater than zero. Matching traffic on the interface pointed to by ipRouteIfIndex or ipCidrRouteIfIndex values associated with those values is intercepted, whichever is specified to be more focused than a default route. If routing changes, either by operator action or by routing protocol events, the interface will change with it. This is primarily intended for use on subscriber interfaces and other places where routing is guaranteed to be symmetrical. In both of these cases, it is possible to have the same packet selected for intersection on both its ingress and egress interface. Nonetheless, only one instance of the packet is sent to the Mediation Device. If the value is -2, packets belonging to a Voice over IP (VoIP) session identified by citapStreamSourceAddress, citapStreamSourceLen and citapStreamSourceL4PortMin may be intercepted, as a specific voice session can be identified with source IP address and udp port number. Other selection parameters may be not considered, even if they are set by the Mediation Device. This value must be set when creating a stream entry, either to select an interface, to select all interfaces, or to select the interface that routing chooses. Some platforms may not implement the entire range of options.