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Example: Shadow Nodes over VLAN and IP Queues
Copyright © 2010, Juniper Networks, Inc.
(Optional) Configure a traffic-class group and reference a scheduler profile in the
5.
QoS profile.
host1(config-qos-profile)#atm group default scheduler-profile default
The router creates the shadow node when the following conditions are met:
After all the nodes and group nodes are created.
If the queues are not at the required scheduler level.
When a node of the same interface type has existed in the same group of the scheduler
hierarchy.
Shadow Node Overview on page 141
Shadow Nodes and Scheduler Behavior on page 142
Managing System Resources for Shadow Nodes on page 143
Monitoring a Scheduler Hierarchy on an Interface with QoS Profiles on page 147
group
node
qos-profile
queue
shadow-node
This example illustrates how and when the system creates shadow node after you
configure it.
In the first part, you specify an Ethernet node, an Ethernet group node, a VLAN node, a
VLAN shadow node, and an IP queue. Because the IP queue is at a proper scheduler level
without the shadow node, the system does not create a shadow node.
host1(config-qos-profile)#ethernet node
host1(config-qos-profile)#ethernet group default scheduler-profile default
host1(config-qos-profile)#vlan node
host1(config-qos-profile)#vlan shadow-node
host1(config-qos-profile)#ip queue traffic-class best-effort scheduler-profile default
In the second part, you specify an Ethernet node, a VLAN node, a shadow node, and a
VLAN queue. The system creates the shadow node so that the VLAN queue is at the
proper scheduler level.
host1(config-qos-profile)#ethernet node
host1(config-qos-profile)#vlan node
host1(config-qos-profile)#vlan shadow-node
host1(config-qos-profile)#vlan queue traffic-class best-effort scheduler-profile default
Chapter 17: Configuring Shadow Nodes for Queue Management
145
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Troubleshooting
