User guide

9-16 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
Q
UALITY OF
S
ERVICE
(Q
O
S)
Figure 9-2: IP packet header encapsulation
Tab le 9-9 lists the commands used to configure DiffServ. Some of the commands are
described in more detail in the following paragraphs.
Table 9- 9: DiffServ Configuration Commands
Command Description
config diffserv examination code-point
<code_point> qosprofile <qosprofile> ports
[<portlist> | all]
Configures the default ingress diffserv code
points to QoS profile mapping. The <code_point>
is a 6-bit value in the IP-TOS byte in the IP
header. You can specify up to 64 different code
points for each port.
config diffserv replacement priority <vpri>
code_point <code_point> ports [<portlist> |
all]
Configures the default egress diffserv
replacement mapping.
disable diffserv examination ports [<portlist> |
all]
Disables the examination of the diffserv field in
an IP packet.
disable diffserv replacement ports [<portlist> |
all]
Disables the replacement of diffserv code points
in packets transmitted by the switch.
EW_023
Type-of-service
DiffServ code point
IHL
Data (variable)
0 bits 31
Options (+ padding)
Destination address
Source address
07654321
Total lengthVersion
ProtocolTime-to-live
Header checksum
FlagsIdentification Fragment offset