Limiting Bandwidth In Both Directions - D-Link DFL-260E User Manual

10.1.4. Limiting Bandwidth in Both
Directions
Web Interface
1. Go to Traffic Management > Traffic Shaping > Pipes > Add > Pipe
2. Specify a suitable name for the pipe, for instance std-in
3. Enter 2000 in the Total textbox under Pipe Limits
4. Click OK
Traffic needs to be passed through the pipe and this is done by using the pipe in a Pipe Rule.
We will use the above pipe to limit inbound traffic. This limit will apply to the actual data packets, and not the
connections. In traffic shaping we're interested in the direction that data is being shuffled, not which computer
initiated the connection.
Create a simple rule that allows everything from the inside, going out. We add the pipe that we created to the
return chain. This means that the packets travelling in the return direction of this connection (outside-in) should
pass through the std-in pipe.
Command-Line Interface
gw-world:/> add PipeRule ReturnChain=std-in SourceInterface=lan
Web Interface
1. Go to Traffic Management > Traffic Shaping > Add > Pipe Rule
2. Specify a suitable name for the pipe, for instance outbound
3. Now enter:
• Service: all_services
• Source Interface: lan
• Source Network: lannet
• Destination Interface: wan
• Destination Network: all-nets
4. Under the Traffic Shaping tab, make std-in selected in the Return Chain control
5. Click OK
This setup limits all traffic from the outside (the Internet) to 2 megabits per second. No priorities are applied, nor
any dynamic balancing.

10.1.4. Limiting Bandwidth in Both Directions

Using a Single Pipe for Both Directions
A single pipe does not care in which direction the traffic through it is flowing when it calculates
total throughout. Using the same pipe for both outbound and inbound traffic is allowed by
NetDefendOS but this will not partition the pipe limit exactly in two between the two directions.
In the previous example only bandwidth in the inbound direction is limited. In most situations, this
is the direction that becomes full first. But what if the outbound traffic must be limited in the same
way?
Just inserting std-in in the forward chain will not work since we probably want the 2 Mbps limit for
outbound traffic to be separate from the 2 Mbps limit for inbound traffic. If 2 Mbps of outbound
traffic attempts to flow through the pipe in addition to 2 Mbps of inbound traffic, the total
SourceNetwork=lannet DestinationInterface=wan
DestinationNetwork=all-nets Service=all_services name=Outbound
455
Chapter 10. Traffic Management