Sample Scheduler Hierarchy For Hashed Load Balancing; Subscriber Load Balancing For 802.3Ad Link Aggregation Groups Overview; S-Vlans And Subscriber Load Balancing; Figure 48: 802.3Ad Link Aggregation Scheduler Hierarchy - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

JunosE 11.3.x Quality of Service Configuration Guide

Sample Scheduler Hierarchy for Hashed Load Balancing

Figure 48: 802.3ad Link Aggregation Scheduler Hierarchy

Subscriber Load Balancing for 802.3ad Link Aggregation Groups Overview

S-VLANs and Subscriber Load Balancing

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shares the traffic equally across the links based on the distribution characteristics defined
in the hash algorithm.
Because all traffic is carried in Ethernet queues, per-subscriber QoS features such as
shared shaping for VLANs are not available.
Figure 48 on page 178 displays a sample 802.3ad link aggregation scheduler hierarchy
that uses hashed load balancing.
The Gigabit Ethernet interfaces are on the same line module and are members of a LAG.
The system dynamically balances traffic between the Ethernet queues on the two ports.
To configure subscriber load balancing, you configure a scheduler hierarchy with nodes
and queues for IP, VLANs, and S-VLANs. The system distributes those nodes and queues
in the scheduler hierarchy over the ports within the LAG using a technique called
partitioning.
Ethernet queues used for hashed load balancing are always present in the scheduler
hierarchy.
To ensure that QoS is symmetrically applied to all the links, the router periodically
rebalances the load within the LAG using a hash algorithm. You can control the
loadbalancing parameters and configure the system to dynamically rebalance. Partitioning
the Scheduler Hierarchy
The system then partitions the scheduler hierarchy by binding the IP, VLAN, L2TP session,
and MPLS resources for each subscriber to a selected link within the LAG at the time the
subscriber interface is configured.
The system clones S-VLAN nodes and queues on each link in the LAG. The system clone
S-VLANs so it can allocate subscribers that share a common S-VLAN ID to different links
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