Ubiquiti Networks Rockeac - Manual (Page 31)

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Chapter 4: Network airOS®7 User Guide
Ubiquiti Networks, Inc.
Traffic Shaping
(Available in Advanced view.) Traffic Shaping controls
bandwidth from the perspective of the client. Bursting
allows fast downloads when a user downloads small files
(for example, viewing different pages of a website), but
prevents a user from using excessive bandwidth when
downloading large files (for example, streaming a movie).
As Layer 3 QoS, you can limit the traffic at the device at
the interface level, based on a rate limit you define. Each
interface has two types of traffic:
•
Ingress traffic entering the interface
• Egress traffic exiting the interface
We recommend using Traffic Shaping to control egress
traffic, because it is more efficient in the egress direction.
When an interface accepts ingress traffic, it cannot control
how quickly the traffic arrives – the sending device
controls that traffic. However, when an interface sends out
egress traffic, it can control how quickly the traffic exits.
Bursting allows the bandwidth to spike higher than the
maximum bandwidth you configure in the Ingress and
Egress Rate settings – for a short period of time. Once the
Ingress or Egress Burst (volume of data) is used up, the
throughput drops back down to the corresponding Ingress
or Egress Rate setting (maximum bandwidth) you have set.
For example, you have the following conditions:
• Egress Burst is set to 2048 kBytes.
• Egress Rate is set to 512 kbit/s.
• Actual maximum bandwidth is 1024 kbit/s.
Bursting allows 2048 kBytes to pass at 1024 kbit/s before
throttling down to 512 kbit/s.
Click the Traffic Shaping section to display its contents.
Enabled Select this option to enable bandwidth control
on the device.
Enabled Displays the status of the rule, Enabled (Yes) or
Disabled (No).
Interface Displays the name of the interface.
Ingress Displays the Ingress status, Enabled or Disabled.
Ingress Rate, kbps Displays the maximum ingress
bandwidth.
Ingress Burst, kB Displays the maximum amount of data
in kilobytes allowed to burst beyond the Ingress Rate.
Egress Displays the Egress status, Enabled or Disabled.
Egress Rate, kbps Displays the maximum egress
bandwidth.
Egress Burst, kB Displays the maximum amount of data
in kilobytes allowed to burst beyond the Egress Rate.
Add Click Add to create a traffic shaper rule. Go to the
Add or Edit a Traffic Shaper Rule section below.
Action After a traffic shaper rule has been created, you
have the following options:
•
Edit Make changes to a traffic shaper rule. Go to the
Add or Edit a Traffic Shaper Rule section below.
• Delete Remove a traffic shaper rule.
Add or Edit a Traffic Shaper Rule
The Traffic Shaper Rule window opens:
• Enabled Select this option to enable the specific
rule. All the added rules are saved in the system
configuration file; however, only the enabled rules are
active on the device.
• Interface Select the appropriate interface.
• Ingress Select this option to enable the ingress values.
- Rate Enter the maximum bandwidth value (in kilobits
per second) for traffic entering the specified interface.
- Burst Enter the data volume (in kilobytes) that is
allowed before the ingress maximum bandwidth
applies.
• Egress Select this option to enable the egress values.
- Rate Enter the maximum bandwidth value (in kilobits
per second) for traffic exiting the specified interface.
- Burst Enter the data volume (in kilobytes) that is
allowed before the egress maximum bandwidth
applies.
Click OK to save changes, or click Cancel to close the
window without saving changes.