Configuring The System To Dynamically Rebalance The Lag - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

Configuring the System to Dynamically Rebalance the LAG

Copyright © 2010, Juniper Networks, Inc.
Table 20: Load Balancing Algorithm Parameters (continued)
Keyword Description
start-threshold Specifies the amount of imbalance in the LAG that triggers the algorithm
to start rebalancing. The default is 0 percent. Optionally, you can specify
one of the following units of measure:
percent—Specifies that the amount of imbalance is measured as a
percentage of the average load per link. The range is 0–100 percent.
For example, the average load per link in a LAG is 500. Specifying
start-threshold 5 percent indicates that the algorithm rebalances
any link that deviates from the average load per link by 25 (5 percent
of 500).
subscribers—Specifies that the amount of imbalance is measured by
the number of subscribers from the average subscriber count in the
LAG. The range is 0–10000.
For example, specifying start-threshold 20 subscribers indicates that
the algorithm rebalances any link with a subscriber count that differs
from the average subscriber count by more than 20.
stop-threshold Specifies the amount of imbalance in the LAG that triggers the algorithm
to stop rebalancing. The algorithm continues rebalancing until this value
is reached. The default is 0 percent. Optionally, you can specify one of
the following units of measure:
percent—Specifies that the amount of imbalance is measured as a
percentage of the average load per link. The range is 0–100 percent.
For example, the average load per link in a LAG is 500. Specifying the
stop-threshold 2 percent command indicates that the algorithm stops
within 10 of 500 (2 percent of 500). In this case, the algorithm stops
when the links are at 510 and 490.
subscribers—Specifies that the amount of imbalance is measured by
the number of subscribers. The range is 0–10000.
For example, specifying stop-threshold 100 subscribers indicates
that the algorithm continues until each link in the LAG is within 100
subscribers of the average subscriber count.
maximum- Specifies the maximum number of links to rebalance in the LAG per
improvement period. The default is 100 percent. Optionally, you can specify one of the
following units of measure:
percent—Specifies that the maximum number of links is measured
as a percentage of the total links. The range is 0–100 percent.
For example, specifying maximum-improvement 1 percent indicates
that the algorithm rebalances 10 links per period (1 percent of 1000).
subscribers—Specifies that the maximum number of links is measured
by the number of subscribers. The range is 0–10000 subscribers.
For example, specifying maximum-improvement 40 subscribers
indicates that the algorithm rebalances 40 subscribers per period.
To configure the system to dynamically rebalance the LAG:
Specify the LAG interface.
1.
Chapter 21: Configuring QoS for 802.3ad Link Aggregation Groups
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