CE - PSE [MAC|IP  <=> PW|MAC|IP]
PWHE interface
  Q1: What info is included in the PW ? PWHE interface encap ?
CE - (ac) - L2PE - (pw) - L2PE - (ac) - L3PE
CE - (ac) - L2PE - (pw) - SPE (L2PE and L3PE collapse into SPE)
apply hierarchical QoS policies (per PW) and flat transit it on the same phy intf
host both L2 and L3 termincated PWs in the same SPE
Type 4/5 PWs
Type 11
PW sub-interfaces
Netflow / ACL /  QoS / uRPF / Lawful intercept
BGP/static routing between CE - (pw) - SPE
VCCV on APE - (pw) - SPE
statistics on PWHE interface
Interface MIB & IP MIB