Guaranteeing Instead Of Limiting Bandwidth - D-Link DFL-1660 User Manual

10.2.7. Guaranteeing Instead of
Limiting Bandwidth
IDP traffic shaping has a special CLI command associated with it called idppipes and this can
examine and manipulate the hosts which are currently subject to traffic shaping.
To display all hosts being traffic shaped by IDP Traffic Shaping, the command would be:
gw-world:/> idppipes -show
Host
----------- ---- ----
192.168.1.1
A host, in this case with IP address 192.168.1.1, can be removed from traffic shaping using the
command:
gw-world:/> idppipes -unpipe -host=192.168.1.1
A full description of the idppipes command can be found in the separate CLI Reference Guide.
Viewing Pipes
IDP Traffic Shaping makes use of normal NetDefendOS pipe objects which are created
automatically. These pipes are always allocated the highest priority and use the Group feature to
throttle traffic.
The created pipes are, however, hidden from the administrator when examining the currently
defined traffic shaping objects with the Web Interface, but they can be examined and manipulated
using the normal CLI pipes command. For example, to show all currently defined pipes, the CLI
command is:
gw-world:/> pipes -show
The IDP Traffic Shaping pipes can be recognized by their distinctive naming convention which is
explained next.
Pipe Naming
NetDefendOS names the pipes it automatically creates in IDP Traffic Shaping using the pattern
IDPPipe_<bandwidth>
IDPPipe_<bandwidth>R for pipes with downstream (return) flowing traffic. A number suffix is
appended if name duplication occurs.
For example, the first pipes created with a limit of 1000 kbps will be called IDPPipe_1000 for
upstream traffic and IDPPipe_1000R for downstream traffic. Duplicates with the same limit would
get the names IDPPipe_1000_(2) and IDPPipe_1000R_(2). If another set of duplicates occur, the
suffix (3) is used.
Pipes are Shared
There is not a 1 to 1 relationship between a configured IDP action and the pipes created. Two pipes
are created per configured bandwidth value, one for upstream (forward) traffic and one for
downstream (return) traffic. Multiple hosts use the same pipe for each direction with traffic in the
upstream pipe grouped using the "Per Source IP" feature and traffic in the downstream pipe grouped
using the "Per Destination IP" feature.

10.2.7. Guaranteeing Instead of Limiting Bandwidth

If desired, IDP Traffic Shaping can be used to do the opposite of limiting bandwidth for certain
applications.
kbps Tmout
100 58
for pipes with
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Chapter 10. Traffic Management
upstream (forward) flowing traffic and