ns2: load sharing function for UDP data
Implement the load sharing function for UDP data.
- on a new LSP select a NSVC based on data weight
e.g. count all weight as sum_weight, LSP %modulo sum_weight, select the NSVC.
NSVC1: data weight: 10 NSVC2: data weight: 5 sum = 15, LSP%sum in (0- 9) => NSVC1 sum = 15, LSP%sum in (10-14) => NSVC2
Maintain a LSP table per NSE containing "LSP, NSVC, timestamp/counter". The timestamp is used to remove old entries when the table is full.