Inalp Networks SmartWare Release 2.10, Software Configuration Manual

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118 Link Scheduler Configuration
Software Configuration Guide Release 2.10, Revision 1.00
rate limit must be defined in a service policy profile.
rate 40
…
source class default
rate 60
Figure 15-5: Service Policy for Low_Priority Arbiter
At last the Level_1 service policy profile has to be used on the outbound IP interface. As shown in the
example in Figure 15-1 a possible related IP interface could be named as “wan”. Therefore the
interface section in the IP context configuration is as shown in Figure 15-6.
context ip
interface wan
use profile service-policy Level_1 out
…
Figure 15-6: IP Interface “wan” uses Service Policy Profile
15.7 Creating a Top-Level Service Policy Profile
Each service policy profile defines how the link arbiter has to act as. The link scheduler allows
building up hierarchical scheduling. The uppermost service policy profile, also referred to as top-
level service policy profile, is that service policy profile with which the link arbiter starts performing.
The top-level service policy profile is made up of following components:
•
Arbitration schema definition, like weighted fair queuing or shaping
• Rate limit definition, that limits the overall output bandwidth on an IP interface
• Definitions of several source classes or policy, each defining the characteristics of handling a
certain traffic type.
Note: Be aware that a service policy profiles can include a lower level service policy profile, which is
regarded as a sub-level profile as the example in Figure 15-3 shows. Not all service policy profile
commands can be used to define a sub-level profile, e.g. the commands priority and rate-limit are
only available when defining a top-level service policy profile. Refer to Chapter 15.8, “Specifying
Source Classes or Lower Level Source Policy Profiles”, for more details.
The syntactical structure of a typical top-level service policy profile is listed in Figure 15-7 below. We
will see over the syntax in more detail. To simplify matters the lines of the policy profile listing are
numbered.
profile service-policy name
rate-limit value
mode mode
source class name
…
source class name
…
source class name
…
source policy name
Figure 15-7: Syntax of a Top-Level Service Policy Profile
The first line specifies the name of the link arbiter profile to configure. On the second line the global
bandwidth limit is set. The value defining the bandwidth has to be entered in kilobits per second, i.e.
for 512 kBit/s the value 512 is used as argument for the rate-limit command. Keep in mind that the