QoS Fabric Profiles
424
Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
9.3.2.1.3 Fixed Platform Fabric Shaping Commands
access-ingress-aggregate-rate
Syntax access-ingress-aggregate-rate access-ingress-aggregate-rate [unshaped-sap-cir cir-
rate]
Context config>system>qos
Description This command sets the rate for fabric shapers on the 7705 SAR-A, 7705 SAR-Ax,
7705 SAR-H, 7705 SAR-Hc, 7705 SAR-M, 7705 SAR-W, or 7705 SAR-Wx for access
ingress traffic. The rate represents the maximum bandwidth that the node can switch through
its fabric interface. Only aggregate mode is supported.
This command is not supported on the 7705 SAR-X, where the shaper rate is set
permanently to 16 Gb/s.
The unshaped-sap-cir command is optional. When used, it assigns a cir-rate to the
unshaped SAP aggregate so that the unshaped SAP aggregate rate can compete with the
shaped SAPs when the round-robin fabric scheduler selects traffic to forward to the switching
fabric. When not used, the cir-rate is set to its default value of 0 kb/s. If the cir-rate is max,
the maximum possible backplane speed is used.
The access-ingress-aggregate-rate can be higher or lower than the cir-rate. If the cir-rate is
higher than the access-ingress-aggregate-rate, then the cir-rate is used by the network
processor, but backpressure from the fabric shaper is applied indirectly to the per-SAP
queues, as follows:
• 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 shaped SAPs and to unshaped SAP
aggregate, which in turn applies backpressure to individual unshaped queues
Default 500000 (“default”) for access-ingress-aggregate-rate
0 for cir-rate
Parameters access-ingress-aggregate-rate — the PIR rate of the fabric shapers for access ingress
traffic, in kb/s. Using the default keyword sets the aggregate rate to 500 000 kb/s.
Values 1 to 10000000 (10 000 000), or default
cir-rate — the CIR rate of the unshaped SAP shaper for access ingress traffic, in kb/s.
Using the max keyword sets the CIR rate to the maximum possible backplane speed.
Values 0 to 10000000 (10 000 000), or max
To Next Page
Loading...
