Quality of Service Guide QoS Fabric Profiles
Edition: 01 3HE 11014 AAAC TQZZA 421
The unshaped-sap-cir command is optional. When used, it assigns an aggregate CIR to all
unshaped 4-priority SAPs so that the unshaped SAP aggregate rate can compete with the
shaped SAPs’ aggregate CIR when the fabric scheduler selects traffic to forward to the
switching fabric.
The default cir-rate value is 0 kb/s. If the cir-rate is max, then the maximum possible
backplane speed for the adapter card, based on the associated fabric policy, is used.
The aggregate-rate can be higher or lower than the cir-rate. If the cir-rate is higher than the
aggregate-rate, then the cir-rate is used by the network processor but the end result is that
backpressure from the fabric shaper is applied indirectly to the per-SAP queues, as explained
below:
• per-SAP (aggregate) shapers—that is, unshaped SAP aggregate CIR or individual
shaped SAP CIRs—prioritize traffic towards the fabric shaper based on the cir-rate
• the fabric shaper shapes the traffic at the configured rate
• when the fabric shaper becomes congested, it applies backpressure to individual SAP
shapers—that is, it applies backpressure to the shaped SAPs and to the unshaped SAP
aggregate, which in turn apply backpressure to individual unshaped queues
The same fabric-profile binding can be used for either network or access on a per-adapter
card basis. However, the unshaped-sap-cir is not applicable when bound to network
ingress.
Default 200000 (“default”) for aggregate-rate
0 for cir-rate
Parameters aggregate-rate — the rate of the fabric shapers in aggregate mode, in kb/s. Using the
default keyword sets the aggregate rate to 200 000 kb/s.
Values 1 to 1000000 (1 000 000), or default for the 7705 SAR-8 with
CSMv2
1 to 2500000 (2 500 000), or default for the 7705 SAR-8 Shelf V2
with CSMv2 (all 6 slots)
1 to 10000000 (10 000 000), or default for the 7705 SAR-8 Shelf V2
with CSMv2 (slots 1 and 2)
1 to 1000000 (1 000 000) or 1 to 2500000 ((2 500 000), or default
for the 7705 SAR-18 (12 MDA slots)
1 to 10000000 (10 000 000), or default for the 7705 SAR-18
(4 XMDA slots)
cir-rate — the CIR rate for the unshaped SAP aggregate shapers, in kb/s. Using the max
keyword sets the CIR rate to the maximum possible backplane speed for the adapter
card, based on the associated fabric policy.
Values 1 to 1000000 (1 000 000), or max for the 7705 SAR-8 with CSMv2
1 to 2500000 (2 500 000), or max for the 7705 SAR-8 Shelf V2 with
CSMv2 (all 6 slots)
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