<｜begin▁of▁sentence｜>
### Instruction:
What is the purpose of the MPLS LDP downstream on demand feature?
### Response:
The MPLS LDP downstream on demand feature is an LDP label advertisement mode in which a downstream router advertises a label to an upstream router only when it is needed to forward traffic. This is more scalable than unsolicited downstream mode. It is enabled with the mpls ldp downstream-on-demand command.
<|EOT|>
