Alcatel-Lucent 7710 SR SONET, Руководство по настройке

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Interface Configuration
7710 SR OS Interface Configuration Guide Page 49
Table 10 and Figure 7 provide the details of the class queue scheduling parameters.
Figure 7: MLPPP Class Queue Scheduling Scheme
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).
Table 10: MLPPP Class Queue Scheduling Parameters
WRR Parameters
4-class MLPPP
Egress QoS Profile MIR W1 W2 W3
Profile 1 85% <1% 66% 33%
Profile 2 90% <1% 89% 10%
Profile 3 85% <1% 87% 12%
OSSG259
Class0
> 100%
No
RR
Strict
Priority
Class1 > MIR
No
Yes
wrr
Class2
W2
W1
Class3
W3