Configuring an Inline Service Interface for L2TP LNS
The inline service interface is a virtual physical service interface
that resides on the Packet Forwarding Engine. This si
interface,
referred to as an anchor interface, makes it
possible to provide L2TP services without a special services PIC.
The inline service interface is supported only by MPCs on MX Series
routers. Four inline service interfaces are configurable per MPC-occupied
chassis slot.
You can maximize the number of sessions that can be shaped in one service interface by setting the maximum number of hierarchy levels to two. In this case, each LNS session consumes one L3 node in the scheduler hierarchy for shaping.
If you do not specify the number of levels (two is the only option), then the number of LNS sessions that can be shaped on the service interface is limited to the number of L2 nodes, or 4096 sessions. Additional sessions still come up, but they are not shaped.
To configure an inline service interface: