Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 109
• adapt-qos link (default)
For SAP queue schedulers, SAP schedulers (H-QoS), and SAP egress MSS
schedulers, link mode forces the full QoS rates (as specified by the SLA) to be
configured on each of the active LAG links. For example, if a SAP queue PIR
and CIR are configured on an active/active LAG SAP to be 200 Mb/s and
100 Mb/s respectively, and there are two active LAG ports, the SAP queue on
each LAG port will be configured to the full SLA, which is a PIR of 200 Mb/s and
a CIR of 100 Mb/s.
For the SAP ingress MSS scheduler, the scheduler rate is configured on an MDA
basis. In LAG link mode, each active LAG link MDA MSS shaper scheduler is
configured with the full SLA. For example, if an MSS shaper group is configured
with an aggregate rate of 200 Mb/s and CIR of 100 Mb/s and is assigned to an
active/active LAG SAP with three ports on MDA 1 and two ports on MDA 2, the
MSS shaper group on MDA 1 and MDA 2 are each configured with the full SLA
of 200 Mb/s for the aggregate rate and 100 Mb/s for the CIR.
Table 13 shows examples of rate and bandwidth distributions based on the
adapt-qos mode configuration.
The following restrictions apply to ingress MSS LAG adaptive QoS (distribute mode).
• A unique MSS shaper group must be used per LAG when a non-default ingress
MSS shaper group is assigned to a LAG SAP using adaptive QoS.
• When a shaper group is assigned to a LAG SAP using adaptive QoS, all ports
in the LAG group must have their MDAs assigned to the same shaper policy.
Table 13 Adaptive QoS Rate and Bandwidth Distribution
Distribute Link
SAP queue scheduler Rate distributed = rate /
number of active links
100% rate configured on
each LAG SAP queue
SAP scheduler (H-QoS) Rate distributed = rate /
number of active links
100% rate configured on
each SAP scheduler
SAP egress MSS
scheduler
Rate distributed = rate /
number of active links
100% rate configured on
each port’s MSS scheduler
SAP ingress MSS
scheduler
Rate distributed per active
LAG MDA = rate × (number of
active links on MDA / total
number of active links)
100% rate configured on
each active LAG MDA MSS
scheduler
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