7705 SAR Interfaces
116
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
• For a LAG SAP, scheduler-mode, agg-rate, and cir-rate are all configurable on
a per-SAP basis, regardless of the LAG member port combination (that is, both
Gen-2 ports, both Gen-3 ports, or a Gen-2-/Gen-3 port mix).
• Scheduler-mode can be set to 4-priority or 16-priority, regardless of the LAG
member port combination, except when one member is a port on a Gen-1
adapter card. In this case, only 4-priority scheduling is available.
• Agg-rate and cir-rate can be set whether scheduler-mode is set to 4-priority or
16-priority.
• The configured scheduler-mode applies to Gen-2-based LAG member ports
only, and is not used for Gen-3-based LAG member ports. Gen-3 cards always
use 4-priority scheduler mode and Gen-1 cards always use 4-priority scheduler
mode. The unshaped-sap-cir keyword does not apply to Gen-3 SAPs because
Gen-3 SAPs are all shaped SAPs.
• If scheduler-mode is 4-priority on the LAG SAP, where the LAG has one
Gen-1-based or Gen-2-based port member and one Gen-3-based port member,
the following points apply.
− The Gen-1-based or Gen-2-based adapter card is configured with 4-priority
scheduling, while agg-rate and cir-rate are not applied, and H-QoS is not
enabled.
− The Gen-3-based adapter card is configured with agg-rate and cir-rate,
while scheduler-mode is ignored.
− When LAG active/standby switching occurs from an active Gen-3-based
port to an active Gen-1-based or Gen-2-based port, traffic management is
changed from a 4-priority scheduler with H-QoS to a 4-priority scheduler
without H-QoS that behaves like an unshaped SAP.
− For the reverse case, when LAG active/standby switching occurs from an
active Gen-1-based or Gen-2-based port to an active Gen-3-based port,
traffic management is changed from a 4-priority scheduler without H-QoS to
a 4-priority scheduler with H-QoS.
• If scheduler-mode is 16-priority on the LAG SAP, where the LAG has one
Gen-2-based port member and one Gen-3-based port member, the following
points apply.
− The Gen-2-based adapter card is configured with 16-priority scheduling
mode, agg-rate and cir-rate. This means that H-QoS is enabled.
− The Gen-3-based adapter card is configured with agg-rate and cir-rate,
while scheduler-mode is ignored.
− When LAG active/standby switching occurs from an active Gen-3-based
port to an active Gen-2-based port, traffic management is changed from a
4-priority scheduler with H-QoS using the agg-rate and cir-rate, to a
16-priority scheduler with H-QoS using the
agg-rate and the cir-rate (that is,
from 4-priority (Gen-3) mode to 16-priority mode for shaped SAPs).
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