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JunosE 11.3.x Quality of Service Configuration Guide
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Configuring Shadow Nodes
144
Shadow node queues stack above a port node, a level 1 node, and a shadow node.
Therefore, the shadow node queue is at level 3. The router does not implicitly create any
nodes for the queues.
You can configure 64,000 level 1 queues using shadow nodes by specifying the group
and shadow node rules in the QoS profile. Each level 1 queue is stacked above the port,
the group node, and the shadow node; therefore, it requires 64,002 descriptors.
Table 15 on page 144 lists the number of nodes required to create a queue.
Table 15: Shadow Node Consumption of Node and Queue Resources
Level 1
Queues
(at Port)
Required Nodes
3
Managing System Resources for Nodes and Queues on page 121
Scaling Subscribers on the TFA ASIC with QoS on page 122
Before you configure shadow nodes:
Configure the traffic classes.
See "Configuring Traffic Classes That Define Service Levels" on page 14.
Configure the queuing hierarchy.
See "Configuring Queue Profiles to Manage Buffers and Thresholds" on page 22.
Configure the scheduler hierarchy and shaping with scheduler profiles.
See "Configuring a Scheduler Hierarchy" on page 47.
To add a shadow node to a QoS profile:
Create a QoS profile and enter QoS Profile Configuration mode.
1.
host1(config)#qos-profile shadowNode
host1(config-qos-profile)#
Configure a scheduler node for each interface of the specified type.
2.
host1(config-qos-profile)#atm node scheduler-profile default
Configure a shadow node for each interface of the specified type.
3.
host1(config-qos-profile)#atm shadow-node scheduler-profile default
Configure a queue for interfaces in the specified traffic class.
4.
host1(config-qos-profile)#atm queue traffic-class strict-priority scheduler-profile
scheduler1
Level 2
Queues
Shadow
(at Node)
Node Queue
2
1
Copyright © 2010, Juniper Networks, Inc.
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