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The evaluation order is not based on the order in the list. The priority depends on how
specific a rule is, taking in account the rules configured across all devices. Routes with
all three parameters defined (i.e. protocol, source and destination) will be considered
first. Rules with a destination take precedence over rules with protocol. These in turn
have a higher priority than rules with a source. Within source and destination, rules
are sorted by descending netmasks. The evaluation order of overlapping protocol
specifications is not defined.
14.1.2.3-H
Bandwidth management / QoS
For bandwidth management you have to fill in the available bandwidth. Uplink and
downlink may be different (ADSL). Leave empty to disable bandwidth management on
this interface. If you enter only one value, either for uplink or for downlink, bandwidth
management will apply to packets in that direction only.
Specifying a wrong bandwidth can cause severe connection
problems, especially if the actual bandwidth is lower than the
configured one. Please ask your provider if you are uncertain.
Outbound bandwidth (uplink)
Enter the uplink bandwidth. For asymmetric connections this is usually the lower value.
Bandwidth management will then process all outbound packets on this interface. The
direction of the corresponding connection (inbound or outbound) doesn't matter.
Inbound bandwidth (downlink)
Enter the downlink bandwidth. For asymmetric connections this is usually the higher
value. Bandwidth management will then process all inbound packets on this interface.
The direction of the corresponding connection (inbound or outbound) doesn't matter.
Leave empty if you don't need inbound bandwidth management.
Inbound bandwidth management is a contradiction in terms. Priority driven re-ordering
of data packets waiting to be transmitted ususally has to be done on the sending
side of the (Internet) link. Only there it can be done in a reliable way. After all the
packet has already been transmitted on the receiver side. However Internet connectivity
with provider guaranteed Quality of Service / bandwidth management is often very
expensive, so inbound bandwidth managment is an option despite of its limitations.
Inbound bandwidth management reduces the available
bandwidth by up to 20%. It requires that an adequate amount of
the inbound data volume is covered by TCP connections.
