Example: QoS Parameter Configuration for Hierarchical Parameters
The example in this section illustrates how to configure hierarchical parameters for VLANs and S-VLANs.
Figure 60 shows the QoS scheduler hierarchy that the QoS client creates for the VLANs and S-VLANs in the interface stack. The QoS client creates explicit parameter instances using the parameter definition max-sub-bw to shape rates at the VLAN subinterfaces 100 and 101.
An S-VLAN node is located below the two VLAN nodes in the interface stack. The QoS client creates an implicit parameter instance by applying a shaper to the S-VLAN subinterface 10 that equals the total rate at the VLANs (3072000).
Procedure for QoS Administrators
This section describes the procedures to configure the scheduler hierarchy shown in Figure 60 by using QoS parameters.
Configuring the Parameter Definition
The QoS administrator configures the parameter definition for the maximum subscriber bandwidth.
To configure a parameter definition for the maximum subscriber bandwidth:
- Configure the parameter definition named max-sub-bw.
- Enable the parameter to control S-VLANs.
- Enable the parameter to control VLANs.
- Enable the parameter to have instances created on VLAN subinterfaces.
- Specify that the QoS client can create the parameter instance for VLANs, which represent subscribers.
host1(config)#qos-parameter-define max-sub-bw hierarchical
host1(config-qos-parameter-define)#controlled-interface-type svlan
host1(config-qos-parameter-define)#controlled-interface-type vlan
host1(config-qos-parameter-define)#instance-interface-type vlan
host1(config-qos-parameter-define)#subscriber-interface-type vlan
host1(config-qos-parameter-define)#exit
Configuring the Scheduler Profiles
The QoS administrator can then reference the parameter definition within a scheduler profile, which defines the shaping rates for the parameter.
- Configure the scheduler profile named sp-shape-cvlan.
- Configure the shaping rate by referencing the parameter max-sub-bw.
host1(config)#scheduler-profile sp-shape-cvlan
host1(config-scheduler-profile)#shaping-rate max-sub-bw
host1(config-scheduler-profile)#exit
- Configure the scheduler profile named sp-shape-svlan.
- Configure the shaping rate by referencing the parameter max-sub-bw.
host1(config)#scheduler-profile sp-shape-svlan
host1(config-scheduler-profile)#shaping-rate max-sub-bw
host1(config-scheduler-profile)#exit
Configuring the QoS Profiles
By referencing the scheduler profiles within QoS profiles, the QoS administrator creates the scheduler hierarchy. In this portion of the example, the QoS administrator configures QoS profiles for the VLAN and the S-VLAN.
- Configure the QoS profile named qp-shape-cvlan.
- Configure the VLAN queue and reference the best-effort traffic class.
- Configure the VLAN node and reference the scheduler profile for shaping VLANs.
host1(config)#qos-profile qp-shape-cvlan
host1(config-qos-profile)#vlan queue traffic-class best-effort
host1(config-qos-profile)#vlan node scheduler-profile sp-shape-cvlan
host1(config-qos-profile)#exit
- Configure the QoS profile named qp-shape-svlan.
- Configure the S-VLAN node and reference the scheduler profile sp-shape-svlan.
host1(config)#qos-profile qp-shape-svlan
host1(config-qos-profile)#svlan node scheduler-profile sp-shape-svlan
host1(config-qos-profile)#exit
Procedure for QoS Clients
This section describes procedures to create parameter instances at VLAN subinterface 100 and VLAN subinterface 101.
- Specify the Gigabit Ethernet interface in slot 2, port 0.
- Configure the VLAN major interface.
- Configure the VLAN subinterface at slot 2, port 0, subinterface 100.
- Assign an S-VLAN ID of 10 and a VLAN ID of 100 to the VLAN subinterface.
- Attach the max-sub-bw QoS parameter to the subinterface with a value of 1024000.
- Attach the qp-shape-cvlan QoS profile to the subinterface.
host1(config)#interface gigabitEthernet 2/0
host1(config-if)#encapsulation vlan
host1(config)#interface gigabitEthernet 2/0.100
host1(config-if)#svlan id 10 100
host1(config-if)#qos-parameter max-sub-bw 1024000
host1(config-if)#qos-profile qp-shape-cvlan
host1(config-if)#exit
- Specify the VLAN subinterface 101 in slot 2, port 0.
- Assign an S-VLAN ID of 10 and a VLAN ID of 101 to the VLAN subinterface.
- Attach the max-sub-bw QoS parameter to the subinterface with a value of 2048000.
- Attach the qp-shape-cvlan QoS profile to the subinterface.
host1(config-if)#interface gigabitEthernet 2/0.101
host1(config-if)#svlan id 10 101
host1(config-if)#qos-parameter max-sub-bw 2048000
host1(config-if)#qos-profile qp-shape-cvlan
host1(config-if)#exit
- Specify the Gigabit Ethernet interface at slot 2, port 0.
- Attach the qp-shape-svlan QoS profile to the node at S-VLAN subinterface 10.
host1(config)#interface gigabitEthernet 2/0
host1(config-if)#svlan 10 qos-profile qp-shape-svlan
Monitoring Hierarchical QoS Parameters
After completing the configuration, both the QoS administrator and the QoS client can monitor it by issuing the show qos-parameter references command. To display the information about hierarchical parameter instances, you must specify the Gigabit Ethernet interface.
host1#show qos-parameter max-sub-bw references interface gigabitEthernet 2/0
parameter instance
interface name value Type
--------------------------- ---------- ------- ------------
GigabitEthernet2/0 svlan 10 max-sub-bw 3072000 hierarchical
GigabitEthernet2/0.100 max-sub-bw 1024000 explicit
GigabitEthernet2/0.101 max-sub-bw 2048000 explicit
Explicit parameter instances: 2
Hierarchical parameter instances: 1
IP multicast parameter instances: 0
Parameter instances reported: 3
Complete Configuration Example
You can use the complete configuration examples provided for each of the configurations in your own network. To customize the configuration example for your needs, copy the text into a text editor, and modify it.
To use the example for immediate use, copy it to the local console or Telnet session from which you access the router.
You can also save the example as a script (.scr) file that executes the commands as though they were entered at the terminal. For information about executing .scr files, see JUNOSe System Basics Configuration Guide, Chapter 2, Command-Line Interface.
QoS Administrator Configuration
From Global Configuration mode:
! Configure the max-sub-bw QoS parameter definition.
qos-parameter-define max-sub-bw hierarchical
controlled-interface-type svlan
controlled-interface-type vlan
instance-interface-type vlan
subscriber-interface-type vlan
exit
! Configure the sp-shape-cvlan and sp-shape-svlan scheduler profiles.
scheduler-profile sp-shape-cvlan
shaping-rate max-sub-bw
exit
scheduler-profile sp-shape-svlan
shaping-rate max-sub-bw
exit
! Configure the qp-shape-cvlan and qp-shape-svlan QoS profiles.
qos-profile qp-shape-cvlan
vlan queue traffic-class best-effort
vlan node scheduler-profile sp-shape-cvlan
exit
qos-profile qp-shape-svlan
svlan node scheduler-profile sp-shape-svlan
exit
QoS Client Configuration
From Global Configuration mode:
! Configure the QoS parameter max-sub-bw for VLAN subinterface 100.
interface gigabitEthernet 2/0
encapsulation vlan
interface gigabitEthernet 2/0.100
svlan id 10 100
qos-parameter max-sub-bw 1024000
qos-profile qp-shape-cvlan
exit
! Configure the QoS parameter max-sub-bw for VLAN subinterface 101.
interface gigabitEthernet 2/0.101
svlan id 10 101
qos-parameter max-sub-bw 2048000
qos-profile qp-shape-cvlan
! Attach the QoS profile to the S-VLAN subinterface 10.
interface gigabitEthernet 2/0
svlan 10 qos-profile qp-shape-svlan