API Guide
5. Exit WRED CONFIGURATION mode.
OS10(config-wred)#exit
6. Create a QoS class-map.
OS10(config)# class-map type queuing example-cmap-wred-1
OS10(config-cmap-queuing)# match queue 2
7. Enter QOS POLICY-MAP mode and create a queuing policy type.
OS10(config)#policy-map type queuing example-pmap-wred-1
OS10(config-pmap-queuing)# class example-cmap-wred-1
8. Assign a WRED profile to the specified queue.
OS10(config-pmap-c-que)#random-detect example-wred-prof-1
9. Exit CLASS MAP and POLICY MAP modes.
OS10(config-pmap-c-que)#exit
OS10(config-pmap-queuing)#exit
10. Enter SYSTEM QOS mode.
OS10(config)#configure system-qos
11. Enable ECN globally.
OS10(config-sys-qos)#random-detect ecn
After you enable ECN globally, ECN marks the CE bit of the ECN field in a packet as ECT.
In the S4200–ON Series platform, configure separate thresholds for ECN capable traffic (ECT). If you enable ECN, ECT is
marked based on the configured ECN threshold and non-ECT drops based on the WRED thresholds.
Storm control
Traffic storms created by packet flooding or other reasons may degrade the performance of the network. The storm control
feature allows you to control unknown unicast, multicast, and broadcast traffic on L2 and L3 physical interfaces.
OS10 devices monitor the current level of the traffic rate at fixed intervals, compares the traffic rate with the configured levels,
and drops excess traffic.
By default, storm control is disabled on all interfaces. Enable storm control using the storm-control { broadcast |
multicast | unknown-unicast } rate-in-pps command in INTERFACE mode.
NOTE: This feature is not supported on the Z9332F-ON platform.
● Enable broadcast storm control with a rate of 1000 packets per second (pps) on Ethernet 1/1/1.
OS10(conf-if-eth1/1/1)# storm-control broadcast 1000
RoCE for faster access and lossless connectivity
Remote Direct Memory Access (RDMA) enables memory transfers between two computers in a network without involving the
CPU of either computer.
RDMA networks provide high bandwidth and low latency without appreciable CPU overhead for improved application
performance, storage and data center utilization, and simplified network management. RDMA was traditionally supported only in
an InfiniBand environment. Currently, RDMA over Converged Ethernet (RoCE) is also implemented in data centers that use
Ethernet or a mixed-protocol environment.
OS10 devices support RoCE v1 and RoCE v2 protocols.
Quality of service
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