ACCESS GATEWAY
12 Introduction
Use Case: Property has 100 Mbps WAN Link
In this scenario, a property wishes to provide guaranteed minimum bandwidth and prioritize
traffic across three groups: Conference, Guest Room, Public Areas. The property can configure
class-based queuing according to the following table.
The sum of minimums across all classes should not exceed the total available bandwidth.
It is generally recommended to set the Maximum to equal the total available bandwidth across
all classes. This allows all classes to take advantage of the full bandwidth when there is no
contention.
With the above configuration, each of the three classes may utilize the entire available
bandwidth when there is no contention. But whenever contention occurs, bandwidth will be
allocated according to priority and minimum guarantee.
For example, if there are no users in the Conference Class, then the Guest Room and Public
Classes can use 100% of the bandwidth. If there is contention between the two, then the Guest
Room class will be allocated up to 80Mbps (because it has a higher priority), with 20Mbps
taken by the Public class (its minimum guarantee). If, however, there were no users in the
Public class, then the Guest Room class could take 100% of the bandwidth (100Mbps).
If users are introduced into the Conference class (Priority 1), and this creates contention, then
they will take bandwidth away from each of the other two classes until each reaches its
minimum.
Example Illustration of Class-Based Queueing
The following diagram demonstrates the effect of Class Based Queueing with a saturated link
of 200Mbps, and three classes defined with minimum guarantees of 100Mbps (Meeting
Room), 60Mpbs (VIP Guests), and 40Mbps (Lobby).
Note the following over time:
Class Priority Minimum Maximum
User Bandwidth
Limit**
Conference 1 30 Mbps 100 Mbps 5 Mbps
Guest Room 2 50 Mbps 100 Mbps 5 Mbps
Public 3 20 Mbps 100 Mbps 3 Mbps
User Bandwidth Limit is not an attribute of Class Based Queueing, but can be
applied (if desired) using existing Bandwidth Limit functionality.
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