HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 573

trust, ip-precedence, ip-precedence, ip precedence, service-policy, interface, service-policy input

Page 573 highlights

Chapter 27 Configuring QoS Configuring Standard QoS Command Step 17 trust [cos | dscp | ip-precedence] Step 18 set {dscp new-dscp | ip precedence new-precedence} Step 19 service-policy policy-map-name Step 20 Step 21 Step 22 exit exit interface interface-id Step 23 service-policy input policy-map-name Purpose Configure the trust state, which QoS uses to generate a CoS-based or DSCP-based QoS label. Note This command is mutually exclusive with the set command within the same policy map. If you enter the trust command, omit Step 18. By default, the port is not trusted. If no keyword is specified when the command is entered, the default is dscp. The keywords have these meanings: • cos-QoS derives the DSCP value by using the received or default port CoS value and the CoS-to-DSCP map. • dscp-QoS derives the DSCP value by using the DSCP value from the ingress packet. For non-IP packets that are tagged, QoS derives the DSCP value by using the received CoS value; for non-IP packets that are untagged, QoS derives the DSCP value by using the default port CoS value. In either case, the DSCP value is derived from the CoS-to-DSCP map. • ip-precedence-QoS derives the DSCP value by using the IP precedence value from the ingress packet and the IP-precedence-to-DSCP map. For non-IP packets that are tagged, QoS derives the DSCP value by using the received CoS value; for non-IP packets that are untagged, QoS derives the DSCP value by using the default port CoS value. In either case, the DSCP value is derived from the CoS-to-DSCP map. For more information, see the "Configuring the CoS-to-DSCP Map" section on page 27-59. Classify IP traffic by setting a new value in the packet. • For dscp new-dscp, enter a new DSCP value to be assigned to the classified traffic. The range is 0 to 63. • For ip precedence new-precedence, enter a new IP-precedence value to be assigned to the classified traffic. The range is 0 to 7. Specify the interface-level policy-map name (from Step 10) and associate it with the VLAN-level policy map. If the VLAN-level policy map specifies more than one class, Return to policy-map configuration mode. Return to global configuration mode. Specify the SVI to which to attach the hierarchical policy map, and enter interface configuration mode. Specify the VLAN-level policy-map name, and apply it to the SVI. Repeat the previous step and this command to apply the policy map to other SVIs. If the hierarchical VLAN-level policy map has more than one interface-level policy map, all class maps must be configured to the same VLAN-level policy map specified in the service-policy policy-map-name command. OL-8915-01 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide 27-55

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27-55
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-01
Chapter 27
Configuring QoS
Configuring Standard QoS
Step 17
trust
[
cos
|
dscp
|
ip-precedence
]
Configure the trust state, which QoS uses to generate a CoS-based or
DSCP-based QoS label.
Note
This command is mutually exclusive with the
set
command
within the same policy map. If you enter the
trust
command,
omit Step 18.
By default, the port is not trusted. If no keyword is specified when the
command is entered, the default is
dscp
.
The keywords have these meanings:
cos—
QoS derives the DSCP value by using the received or default
port CoS value and the CoS-to-DSCP map.
dscp—
QoS derives the DSCP value by using the DSCP value from
the ingress packet. For non-IP packets that are tagged, QoS derives
the DSCP value by using the received CoS value; for non-IP
packets that are untagged, QoS derives the DSCP value by using
the default port CoS value. In either case, the DSCP value is
derived from the CoS-to-DSCP map.
ip-precedence—
QoS derives the DSCP value by using the IP
precedence value from the ingress packet and the
IP-precedence-to-DSCP map. For non-IP packets that are tagged,
QoS derives the DSCP value by using the received CoS value; for
non-IP packets that are untagged, QoS derives the DSCP value by
using the default port CoS value. In either case, the DSCP value is
derived from the CoS-to-DSCP map.
For more information, see the
“Configuring the CoS-to-DSCP Map”
section on page 27-59
.
Step 18
set
{
dscp
new-dscp
|
ip precedence
new-precedence
}
Classify IP traffic by setting a new value in the packet.
For
dscp
new-dscp
, enter a new DSCP value to be assigned to the
classified traffic. The range is 0 to 63.
For
ip precedence
new-precedence,
enter a new IP-precedence
value to be assigned to the classified traffic. The range is 0 to 7.
Step 19
service-policy
policy-map-name
Specify the interface-level policy-map name (from Step 10) and
associate it with the VLAN-level policy map.
If the VLAN-level policy map specifies more than one class,
Step 20
exit
Return to policy-map configuration mode.
Step 21
exit
Return to global configuration mode.
Step 22
interface
interface-id
Specify the SVI to which to attach the hierarchical policy map, and
enter interface configuration mode.
Step 23
service-policy input
policy-map-name
Specify the VLAN-level policy-map name, and apply it to the SVI.
Repeat the previous step and this command to apply the policy map to
other SVIs.
If the hierarchical VLAN-level policy map has more than one
interface-level policy map, all class maps must be configured to the
same VLAN-level policy map specified in the
service-policy
policy-map-name
command.
Command
Purpose