LI Encapsulation Qumran-MX (BCM) supports LI with 32 bits shim header: SHIMoUDPoIPoETH Packet Format Encoding Figure 1. Packet Format Encoding Payload Direction Value Payload Direction 0 Reserved for keepalive mechanism 2 Intercepted data or event was sent to target (downstream) 3 Intercepted data or event was sent from target (upstream) Mapping Payload Format Value Payload Format 0-3 Reserved (unused) 4 Unknown, Not able to decide the PT 5 IPv4 packet (not used) 6 IPv6 packet (not used) 7 Ethernet Frame (used for Lawful Interception) Sub-payload Format (Type) The sub-payload formats are: Single VLAN tag Double VLAN tag Untagged Lawful Interception Overview Enabling Lawful Interception
