Link scheduler configuration task list
153
IPLink Software Configuration Guide
14 • Link scheduler configuration
•
“modem-512” is the title of the profile which is referred to when installing the scheduler
•
“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 IPLink software with the Cisco IOS QoS software command syntax often helps administrators to
straightforwardly configure IPLink devices. In
table 7
the Cisco IOS Release 12.2 QoS commands are in con-
trast with the respective IPLink software commands.
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 156
)
•
Specifying the handling of traffic-classes (see
page 158
)
•
Devoting the service policy profile to an interface (see
page 164
)
Table 7. Command cross reference
Action
IOS command
IPLink software
command
Specifies the name of the policy map or profile
to be created or modified.
policy-map
policy-map-
name
profile service-policy
profile-name
Specifies the name of the class map or class to
be created.
class-map
class-map-name
source traffic-class
class-
name
For IOS specifies average or peak bit rate
shaping. For IPLink software assigns the aver-
age bit rate to a source.
shape
{average | peak}
cir
[bc] [be]
rate
bit-rate
For IOS specifies or modifies the bandwidth
allocated for a class belonging to a policy
map. Percent defines the percentage of avail-
able bandwidth to be assigned to the class. For
IPLink software assigns the weight of the
selected source (only used with wfq).
bandwidth
{
bandwidth-
kbps
|
percent
percent
}
share
percent-of-bandwidth