Example - HP MSM7xx Management And Configuration Manual

Note
Management traffic (which includes RADIUS, SNMP, and administrative sessions) is

assigned to bandwidth level Very High and cannot be changed.
 All traffic assigned to a particular bandwidth level shares the allocated bandwidth for
that level across all VSCs. This means that if you have three VSCs all assigning user traffic
to High, all users share the bandwidth allocated to the High level.
Customizing bandwidth levels
Bandwidth levels are arranged in order of priority from Very High to Low. Priority determines
how free bandwidth is allocated once the minimum rate is met for each level. Free bandwidth
is always assigned to the higher priority levels first.
Bandwidth rates for each level are defined by taking a percentage of the maximum transmit
and receive rates defined for the Internet port. Each bandwidth level has four rate settings:
 Transmit rate - guaranteed minimum: Minimum amount of bandwidth that will be
assigned to a level as soon as outgoing traffic is present on the level.
 Transmit rate - maximum: Maximum amount of outgoing bandwidth that can be
consumed by the level. Traffic in excess is buffered for short bursts, and dropped for
sustained overages.
 Receive rate - guaranteed minimum: Minimum amount of bandwidth that will be assigned
to a level as soon as incoming traffic is present on the level.
 Receive rate - maximum: Maximum amount of incoming bandwidth that can be
consumed by the level. Traffic in excess is buffered for short bursts, and dropped for
sustained overages.

Example

For example, assume that transmit bandwidth is configured as follows:
Very High
High
Normal
Low
Next, assume the following bandwidth requirement occurs on transmitted user data:
 High requires 70%, which is 30% more than its minimum.
 Normal requires 50%, which is 30% more than its minimum.
 There is no traffic on Very High or Low.
Transmit rates
Min Max
20 20
40 100
20 100
20 20
Network configuration
Bandwidth control
3-23