JUNOSe 9.1.x Quality of Service Configuration Guide > Configuring and Attaching QoS Profiles to an Interface > Example: QoS Profile Attachment to Port

Example: QoS Profile Attachment to Port

In Figure 38, the major ATM interface, 11/0, has QoS profile qp1 explicitly attached. The major ATM interface has three ATM subinterfaces configured:

• ATM 11/0.1—No QoS profile is explicitly attached
• ATM 11/0.2—QoS profile qp2 is attached
• ATM 11/0.3—No QoS profile is explicitly attached

The qp1 profile overrides the QoS port-type profile, atm-default, on subinterfaces 1 and 3. It does not override profile qp2, which was explicitly attached to subinterface 2.

Figure 38: Attaching QoS Profile to ATM Interface and Subinterface

To configure this example:

1. Create and configure QoS profile qp1.

host1(config)#qos-profile qp-1

host1(config-qos-profile)#atm-vp node scheduler-profile sp1 

host1(config-qos-profile)#atm-vc queue traffic-class tc1 scheduler-profile sp1 
queue-profile qp1 

host1(config-qos-profile)#atm-vc queue traffic-class tc2 scheduler-profile sp2 
queue-profile qp2

host1(config-qos-profile)#atm-vc queue traffic-class tc3 scheduler-profile sp3 
queue-profile qp3

host1(config-qos-profile)#atm-vc queue traffic-class tc4 scheduler-profile sp4 
queue-profile qp4

host1(config-qos-profile)#atm-vc queue traffic-class tc5 scheduler-profile sp5 
queue-profile qp5

host1(config-qos-profile)#exit

2. Create and configure QoS profile qp2.

host1(config)#qos-profile qp2

host1(config-qos-profile)#atm-vp node scheduler-profile sp1 

host1(config-qos-profile)#atm-vc queue traffic-class tc1 scheduler-profile sp1 
queue-profile qp1

host1(config-qos-profile)#atm-vc queue traffic-class tc2 scheduler-profile sp2 
queue-profile qp2

host1(config-qos-profile)#atm-vc queue traffic-class tc3 scheduler-profile sp3 
queue-profile qp3

host1(config-qos-profile)#exit

3. Attach QoS profile qp1 to ATM interface 11/0.

host1(config)#interface atm 11/0

host1(config-if)#qos-profile qp1

host1(config-if)#exit

4. Attach QoS profile qp2 to ATM subinterface 11/0.2.

host1(config)#interface atm 11/0.2

host1(config-subif)#qos-profile qp2

host1(config-subif)#exit

host1(config)#exit

5. Display the QoS interface hierarchy for ATM 11/0.

host1#show qos interface-hierarchy interface atm 11/0

qos          interface  rule   traffic       scheduler   queue  t-class

profile      type       type   class         profile     profile  group

-------      ---------  ----   -------       ---------   ------- -------     

@ATM11/0     atm        queue  best-effort   default    default

qp1@ATM11/0  atm-vp     node                 sp1        default

qp1@ATM11/0  atm-vc     queue  tc1           sp1        qp1

qp1@ATM11/0  atm-vc     queue  tc2           sp2        qp2

qp1@ATM11/0  atm-vc     queue  tc3           sp3        qp3

qp1@ATM11/0  atm-vc     queue  tc4           sp4        qp4

qp1@ATM11/0  atm-vc     queue  tc5           sp5        qp5

attachment@ atm-vc ATM11/0.2:

qos          interface  rule   traffic       scheduler  queue  t-class

profile      type       type   class         profile    profile  group

-------      ---------  ----   -------       ---------  ------- -------     

qp2@ATM11/0.2 atm-vp     node                sp1        default

qp2@ATM11/0.2 atm-vc     queue  tc1          sp1        qp1

qp2@ATM11/0.2 atm-vc     queue  tc2          sp2        qp2

qp2@ATM11/0.2 atm-vc     queue  tc3          sp3        qp3

@ATM11/0      atm        queue  best-effort  default    default

qp1@ATM11/0   atm-vc     queue  tc4          sp4        qp4

qp1@ATM11/0   atm-vc     queue  tc5          sp5        qp5

Note that:

• ATM best-effort queues are created on ATM interface @ATM11/0 and ATM 11/0.2.
• ATM 11/0.2 subinterface has three queues (traffic classes tc1, tc2, and tc3) that come from QoS profile qp2. Traffic class tc3 is defined in both QoS profile qp1 and qp2. The QoS profile attached closest to the leaf node is used, however. Traffic class tc3 comes from QoS profile qp2, which is attached to ATM subinterface ATM 11/0.2.
• Queues for traffic classes tc4 and tc5 come from QoS profile qp1, which is attached at the ATM major interface.