User guide

9-20 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
Q
UALITY OF
S
ERVICE
(Q
O
S)
3 To enable the switch to overwrite the DiffServ code point:
enable dot1p replacement
enable diffserv replacement
4 Configure the switch so that other switches may signal class of service that this
switch should observe:
enable diffserv examination
Tab le 9-3 indicates that qp3 is tied to hardware queue Q2. We also know that when
replacement is enabled all traffic sent out Q2 will contain code point value 16
(according to Tabl e 9-11). If this is the desired code point to use, all traffic from 10.1.2.x
will be sent out QP3 (at 10% minimum and 100% maximum) with a code point value of
16.
P
HYSICAL AND
L
OGICAL
G
ROUPINGS
Two traffic groupings exist in this category:
• Source port
• VLAN
S
OURCE PORT
A source port traffic grouping implies that any traffic sourced from this physical port
uses the indicated QoS profile when the traffic is transmitted out to any other port. To
configure a source port traffic grouping, use the following command:
config ports <portlist> qosprofile <qosprofile>
In the following BlackDiamond switch example, all traffic sourced from slot 5 port 7
uses the QoS profile named qp3 when being transmitted.
config ports 5:7 qosprofile qp3
VLAN
A VLAN traffic grouping indicates that all intra-VLAN switched traffic and all routed
traffic sourced from the named VLAN uses the indicated QoS profile. To configure a
VLAN traffic grouping, use the following command:
config vlan <name> qosprofile <qosprofile>