Figure 5: Policer Behavior with a Single TCP Connection
Traffic
Volume
Bandwidth Limit
Time
g041262
Unused Bandwidth
The problem presented in this scenario is that some bandwidth is available, but it is not
being used by the traffic. The unused bandwidth shown in
is the result
of an overall data throughput that is lower than the configured bandwidth value. This
example is an extreme case because there is only a single TCP connection.
Scenario 2: Multiple TCP Connections
With multiple TCP connections or some background non-TCP-based traffic, there is less
unused bandwidth, as depicted in
. However, the same issue of unused
bandwidth still exists if all the TCP connections experience a drop when the aggregated
traffic rate exceeds the configured bandwidth limit.
Figure 6: Policer Behavior with Background Traffic (Multiple TCP
Connections)
Traffic
Volume
Bandwidth Limit
Time
Background Traffic
g041263
Unused Bandwidth
Multiple
TCP Connections
To reduce the problem of unused bandwidth in your network, you can configure a burst
size.
Related
Documentation
Policer Implementation Overview on page 25
•
•
Determining Proper Burst Size for Traffic Policers on page 30
29
Copyright © 2016, Juniper Networks, Inc.
Chapter 5: Implementing Traffic Policers on EX 9200 Switches
Summary of Contents for EX9200 Series
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