QoS Calcuation

Layer 2 overheads
Ethernet (LAN) = 18
WAN (MLP or FRF) = 6+1
WAN MLP over FRF = 14
WAN (ATM) = 5

Layer 3 overheads
IP\UDP\RTP (20\8\12) = 40
with CRTP = 2 (or 4 with checksum)

Packet Sizes (Payload):
G729 20 (PPS=50) Standard
G711 160 (PPS=50) Standard
G729 30 (PPS=33)
G711 240 (PPS=33)
G729 40 (PPS=25)
G711 320 (PPS=25)

Formula for Calculations:
[(overheads + payload) *8 *PPS] / 1000

Marking
IP Routing CS6 48
Voice EF 46
Int Video Traffic AF41-43 34
Video Streaming CS4 32
Mission Critical AF31-33 25
Call Sig CS3 24
Transactional Data (Apps) AF21-23 18
Network Mgmt CS2 16
Bulk Data AF11-13 10
Scavenger CS1 8
Best Effort BE 0