NETGEAR DGFV338 - ProSafe Wireless ADSL Modem VPN Firewall Router Configuration Manual page 5

What changes do the ToS settings make to the packet headers?
In the IPv4 packet header, the second byte (bits 9-16) is designated "Type Of Service" (ToS).
The use of this byte has changed as different QoS standards have been established. I shall refer to these
different standards as "Original ToS", "RFC1349 ToS", and "DSCP":
Original ToS:
Precedence Precedence Precedence Minimize
RFC 1349 ToS:
Precedence Precedence Precedence Minimize
Differentiated Services Code Point (DSCP):
DSCP DSCP
The DGFV338 complies with RFC1349, and it's ToS settings cause the following values to be set in the
ToS byte of packets exiting the WAN port:
Precedence
Normal
0
Service
Minimize
0
Delay
Maximize
0
Throughput
Maximize
0
Reliability
Minimize
0
Cost
Delay
Delay
DSCP DSCP
Precedence Precedence Minimize
Delay
0 0
0 0
0 0
0 0
0 0
Maximize
Throughput
Maximize
Throughput
DSCP DSCP
Maximize Maximize
Throughput Reliability
0 0 0
1 0 0
0 1 0
0 0 1
0 0 0
Maximize Unused
Reliability
Maximize Minimize
Reliability Cost
ECT
Explicit
Congestion
Notification
Capable
Transport
Minimize Unused Decimal
Cost
0 0 0
0 0 16
0 0 8
0 0 4
1 0 2
Unused
Unused
ECN
Explicit
Congestion
Notification
Hex DSCP
0 0
Ox10 4
0x08 2
0x04 1
0x02 0