User guide

E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
9-19
T
RAFFIC
G
ROUPINGS AND
C
REATING A
Q
O
S P
OLICY
You then change the 802.1p priority to DiffServ code point mapping to any code point
value using the following command:
config diffserv replacement priority <vpri> code_point <code_point>
ports [<portlist> | all]
By doing so, the hardware queue used to transmit a packet determines the DiffServ
value replaced in the IP packet.
To verify the DiffServ configuration, use the command:
show ports <portlist> info {detail}
D
IFF
S
ERV
E
XAMPLE
In this example, we use DiffServ to signal a class of service throughput and assign any
traffic coming from network 10.1.2.x with a specific DiffServ code point. This allows all
other network switches to send and observe the Diffserv code point instead of repeating
the same QoS policy on every network switch.
Configure the switch that handles incoming traffic from network 10.1.2.x as follows:
1 Configure parameters of the QoS profile QP3:
config qp3 min 10 max 100
2 Assign a traffic grouping for traffic from network 10.1.2.x to qp3:
create access-list TenOneTwo
config TenOneTwo 10.1.2.0/24 permit qp3
Table 9-11: Default 802.1p Priority Value-to-Code Point Mapping
Hardware Queue
“
i ” Chipset
802.1p Priority
value
Code Point
Q0 0 0
Q1 1 8
Q2 2 16
Q3 3 24
Q4 4 32
Q5 5 40
Q6 6 48
Q7 7 56