SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Rate-limit mode is intended to allow some CPPI ingress channels and some Ethernet transmit (switch egress) priorities to be rate-limited. Non rate-limited traffic (bulk traffic) is allowed on lower priority non ratelimited channels and FIFO priorities. Rate-limited traffic must be configured to be sent to rate-limited queues (via packet priority handling). The allocated rates for rate-limited traffic must not be oversubscribed. For example, if port 1 is sending 15% rate limited traffic to port 2 priority 3, and port 0 is also sending 10% rate-limited traffic to port 2 priority 3, then the port 2 priority 3 egress rate must be configured to be 25% plus a percent or two for margin. The switch must be configured to allow some percentage of non ratelimited traffic. Non rate-limited traffic must be configured to be sent to non rate-limited queues. No packets from the host should be dropped, but non rate-limited Ethernet ingress traffic can be dropped. For rate limited priorities, the configured transfer rate includes the committed information rate and the excess information rate. The excess information rate will only be attempted to be sent when there is no packet backlog on every priority that does not have the excess information rate enabled. The committed information rate will be sent regardless of network traffic as long as the configuration is not oversubscribed. The excess information rate will be sent only when network conditions allow.