Command Reference Guide

3Com Router 5000 Family and Router 6000 Family mpls label advertise ● 51
Command Reference
Description When the keyword explicit-null is selected, the m-layer label of a packet with
m-layer label parameter is popped at the penultimate LSR of the LSP, instead of at the
egress LSR. This can lower the stack operation demands at egress node and
somewhat mitigate the load on the egress node.
If the explicit null label is assigned to the penultimate hop, it can only reside at the
bottom of the label stack.