Patton electronic SmartNode 4110 Series manual Link scheduler configuration task list

SmartWare Software Configuration Guide 13 • Link scheduler configuration

•“rate-limit 512” allows no more than 512 kbit/sec to pass which avoids queueing in the modem.

•“header-length 20” specifies how many framing bytes are added by the modem to “pack” the IP packet on the link. The framing is taken into account by the rate limiter.

•“atm-modem” tells the rate limiter that the access link is ATM based. This option includes the ATM over- head into the rate limit calculation. Please add 8 bytes to the header-length for AAL5 in this case.

•“source traffic-class” enters a sub-mode where the specific handling for a traffic-class is described. The list of sources in the service-policy profile tells the arbiter which “traffic sources” to serve.

•“local-voice” is the predefined traffic-class for locally terminated voice packet streams.

•“priority” means that packet of the source being described are always passed on immediately, packets of other classes follow later if the rate limit permits.

Command cross reference

Comparing SmartWare with the Cisco IOS QoS software command syntax often helps administrators to straightforwardly configure SmartNode devices. In table 4 the Cisco IOS Release 12.2 QoS commands are in contrast with the respective SmartWare commands.

Table 4. Command cross reference

Action	IOS command	SmartWare command
Specifies the name of the policy map or profile	policy-map policy-map-	profile service-policy
to be created or modified.	name	profile-name
Specifies the name of the class map or class to	class-mapclass-map-name	source traffic-class class-
be created.		name
For IOS specifies average or peak bit rate	shape {average peak} cir	rate bit-rate
shaping. For SmartWare assigns the average	[bc] [be]
bit rate to a source.
For IOS specifies or modifies the bandwidth	bandwidth {bandwidth-	share percent-of-bandwidth
allocated for a class belonging to a policy	kbps percent percent}
map. Percent defines the percentage of avail-
able bandwidth to be assigned to the class. For
SmartWare assigns the weight of the selected
source (only used with wfq).

Link scheduler configuration task list

To configure QoS features, perform the tasks described in the following sections. Depending on your require- ments some of the tasks are required while other tasks are optional.

•Defining the access control list profile

•Creating a service-policy profile (see page 159)

•Specifying the handling of traffic-classes (see page 161)

•Devoting the service policy profile to an interface (see page 167)

•Displaying link arbitration status (see page 168)

•Displaying link scheduling profile information (see page 168)

Link scheduler configuration task list 156