Specifications

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Cisco NAC Appliance - Clean Access Manager Configuration Guide
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Chapter 8 User Management: Traffic Control, Bandwidth, Schedule
Control Bandwidth Usage
Figure 8-10 Bandwidth Form for User Role
Note Alternatively, you can go to User Management > User Roles > List of Roles and click the BW icon
next to the role.
4. Set the maximum bandwidth in kilobits per second for upstream and downstream traffic in
Upstream Bandwidth and Downstream Bandwidth. Upstream traffic moves from the untrusted to
the trusted network, and downstream traffic moves from the trusted to the untrusted network.
5. Enter a Burstable Traffic level from 2 to 10 to allow brief (one second) deviations from the
bandwidth limitation. A Burstable Traffic level of 1 has the effect of disabling bursting.
The Burstable Traffic field is a traffic burst factor used to determine the “capacity” of the bucket.
For example, if the bandwidth is 100 Kbps and the Burstable Traffic field is 2, then the capacity of
the bucket will be 100Kb*2=200Kb. If a user does not send any packets for a while, the user would
have at most 200Kb tokens in his bucket, and once the user needs to send packets, the user will be
able to send out 200Kb packets right away. Thereafter, the user must wait for the tokens coming in
at the rate of 100Kbps to send out additional packets. This can be thought of as way to specify that
for an average rate of 100Kbps, the peak rate will be approximately 200Kbps. Hence, this feature is
intended to facilitate bursty applications such as web browsing.
6. In the Shared Mode field, choose either:
– All users share the specified bandwidth – The setting applies for all users in the role. In this
case, the total available bandwidth is a set amount. In other words, if a user occupies 80 percent
of the available bandwidth, only 20 percent of the bandwidth will be available for other users in
the role.
– Each user owns the specified bandwidth – The setting applies to each user. The total amount
of bandwidth in use may fluctuate as the number of online users in the role increases or
decreases, but the bandwidth for each user is the same.
7. Optionally, type a Description of the bandwidth setting.
8. Click Save when finished.
The bandwidth setting is now applicable for the role and appears in the Bandwidth tab.