This feature is useful when connecting the 7210 SAS to an Ethernet-over-SDH (EoSDH) (or microwave) network, where the network allocates predetermined bandwidth to the nodes connecting into it, based on the transport bandwidth requirement. When connecting to such a network, it is important that the traffic sent into the SDH node does not exceed the configured values, because the SDH network does not have the QoS capabilities and buffers required to prioritize the ingress traffic.
Egress rate attributes include the following:
Allows for per port configuration of the maximum egress port rate, using the egress-rate CLI command.
Ethernet ports configured as access and access uplink support this feature.
The port scheduler distributes the available maximum egress bandwidth based on the CIR/PIR configuration parameters provisioned for the queues.
The 7210 SAS-D and 7210 SAS-Dxp provide support for a burst parameter to control the amount of burst the egress port can generate.
When ports are members of a LAG, all the ports use the same value for egress-rate and max-burst.
If frame overhead accounting (also known as Frame-based accounting) is enabled, the queue scheduler accounts for the Ethernet frame overhead.