Table 10: Mlppp Class Queue Scheduling Parameters; Figure 7: Mlppp Class Queue Scheduling Scheme - Alcatel-Lucent 7750 SR OS Interface Configuration Manual

Table 10

Table 10: MLPPP Class Queue Scheduling Parameters

4-class MLPPP
Egress QoS Profile
Profile 1
Profile 2
Profile 3
Note that all queue threshold and queue scheduling parameters are adjusted to the available bundle
rate. If a member link goes down or a new member link is added to the bundle, the scheduling
parameters MIR, W1, W2, W3, as well as the per class queue thresholds OOP and max are
automatically adjusted to maintain the same values.
Class 0 queue is serviced at MLPPP at available bundle rate. Class 1 queue is guaranteed a
minimum service rate but is allowed to share additional bandwidth with class 2 and 3 queues
based on the configuration of WRR weight W1.
Class queues 2 and 3 can be given bandwidth guarantee by limiting MIR of class 1 queue to less
than 100% and by setting the WRR weights W1, W2, and W3 to achieve the desired bandwidth
distribution among all three class queues.
Note that there is one queue per bundle member link to carry link control packets, such as LCP:
PPP, and which are serviced with strict priority over the 4 class queues (not shown).
7750 SR OS Interface Configuration Guide
and Figure 7 provide the details of the class queue scheduling parameters.
MIR
85%
90%
85%
Class0
> 100%
Class1 > MIR
Yes
Class2
Class3

Figure 7: MLPPP Class Queue Scheduling Scheme

WRR Parameters
W1 W2
<1% 66%
<1% 89%
<1% 87%
No
RR
No
W1
W2
wrr
W3
Interface Configuration
W3
33%
10%
12%
Strict
Priority
OSSG259
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