D-Link DFL-210-WCF-12 Product Manual - Page 447
Simple Bandwidth Limiting, Explicitly Excluding Traffic from Shaping, Pipes Will Not Work
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10.1.3. Simple Bandwidth Limiting Chapter 10. Traffic Management of 8 pipes. Explicitly Excluding Traffic from Shaping If no pipe is specified in a pipe rule list then traffic that triggers the rule will not flow through any pipe. It also means that the triggering traffic will not be subject to any other matching pipe rules that might be found later in the rule set. This provides a means to explicitly exclude particular traffic from traffic shaping. Such rules are not absolutely necessary but if placed at the beginning of the pipe rule set, they can guard against accidental traffic shaping by later rules. Pipes Will Not Work With FwdFast IP Rules It is important to understand that traffic shaping will not work with traffic that is flows as a result of triggering a FwdFast IP rule in the NetDefendOS IP rule sets. The reason for this is that traffic shaping is implemented by using the NetDefendOS state engine which is the subsystem that deals with the tracking of connections. FwdFast IP rules do not set up a connection in the state engine. Instead, packets are considered not to be part of a connection and are forwarded individually to their destination, bypassing the state engine. Figure 10.2. FwdFast Rules Bypass Traffic Shaping 10.1.3. Simple Bandwidth Limiting The simplest use of pipes is for bandwidth limiting. This is also a scenario that does not require much planning. The example that follows applies a bandwidth limit to inbound traffic only. This is the direction most likely to cause problems for Internet connections. Example 10.1. Applying a Simple Bandwidth Limit Begin with creating a simple pipe that limits all traffic that gets passed through it to 2 megabits per second, regardless of what traffic it is. Command-Line Interface gw-world:/> add Pipe std-in LimitKbpsTotal=2000 447