JUNOSe 9.0.x Quality of Service Configuration Guide > Configuring Shadow Nodes for Queue Management > Shadow Node Configuration Examples

Shadow Node Configuration Examples

The examples in this section illustrate common shadow node tasks.

Shadow Nodes over VLAN and IP Queues

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

Shadow Nodes on the Same Traffic-Class Group

This example demonstrates how to configure the shadow nodes on the same traffic-class group.

You specify a VLAN node, an IP node, an IP video queue, and a best-effort Ethernet queue. The system adds the Ethernet node, the VLAN node, the IP node, and the IP video queue to the scheduler hierarchy. Even though the two queues belong to the same traffic-class group, the Ethernet best-effort queue is stacked above the shadow node and the IP video queue is stacked above the IP node.

host1(config-qos-profile)#ethernet node

host1(config-qos-profile)#ethernet shadow-node scheduler profile shadow

host1(config-qos-profile)#ethernet queue traffic-class best-effort scheduler-profile 
default

host1(config-qos-profile)#vlan node

host1(config-qos-profile)#ip node

host1(config-qos-profile)#ip queue traffic-class video scheduler-profile default

Shadow Nodes on Different Traffic-Class Groups

This example shows how to configure shadow nodes on different traffic-class groups. After adding the voice queue in the auto-strict priority group named strict, the system stacks the IP voice queue above the Ethernet port, the voice group, and the phantom node.

host1(config-qos-profile)#ethernet node

host1(config-qos-profile)#ethernet shadow-node scheduler profile shadow

host1(config-qos-profile)#ethernet queue traffic-class best-effort scheduler-profile 
default

host1(config-qos-profile)#vlan node

host1(config-qos-profile)#ip node

host1(config-qos-profile)#ip queue traffic-class video scheduler-profile default

host1(config-qos-profile)#ethernet group voice-group scheduler-profile strict

host1(config-qos-profile)#ip queue traffic-class voice scheduler-profile default