• Related Topics
• Configuring Hierarchical CoS for a Subscriber Interface of Aggregated Ethernet Links
• For more information on the hierarchical scheduler (CoS), see the Junos Class of Service Configuration Guide.

Configuring Hierarchical Scheduler on Aggregated Ethernet Interfaces Without Link Protection

On aggregated Ethernet interfaces configured on the IQ2 PIC, you can configure the hierarchical scheduler in non–link-protect mode. The M120, MX Series, and T Series routers with aggregated Ethernet IQ2 PICs in non–link-protect mode support the following scheduler functions:

• Per unit scheduler
• Hierarchical scheduler
• Shaping at the physical interface

To configure the hierarchical scheduler on aggregated Ethernet interfaces in the non link-protect mode, include the hierarchical-scheduler statement at the [edit interfaces aeX] hierarchy level:

Prior to Junos OS Release 9.6, the hierarchical scheduler mode on these models required the aggregated-ether-options statement link-protection option, otherwise a configuration error occurs.

To specify the member link bandwidth derivation based on the equal division model (scale) or the replication model (replicate) on aggregated Ethernet interfaces, include the member-link-scheduler (scale | replicate) option at the [edit class-of-service interfaces aeX] hierarchy level. The default setting is scale.

Note: In link-protect mode, only one link is active at a time and the other link acts as the backup link, whereas in a non link-protect mode, all the links of the aggregate bundle are active at the same time. There is no backup link. If a link goes down or a new link is added to the bundle, traffic redistribution occurs.