Flexible MPLS label stack depth

This feature extends the number of labels per component a device can push in the next hop chain. You can leverage this capability for features such as segment routing traffic-engineering (TE), LSPs, and RSVP-TE pop-and-forward LSPs. The number of labels that can be pushed for an MPLS next hop is the number of labels the device is capable of pushing, or the maximum-labels configured under family mpls of the outgoing interface, whichever is smaller.