Ufp Strict Bandwidth Provisioning Mode - Lenovo RackSwitch G8264 Application Manual

UFP Strict Bandwidth Provisioning Mode

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G8264 Application Guide for ENOS 8.4
Strict bandwidth provisioning mode configures the switch and NIC apply
bidirectional bandwidth control on the vPort as per the defined configuration. By
default, a bandwidth of 2.5 Gbps per vPort is guaranteed. If other vPorts are idle,
the bandwidth of a vPort can be up to 10 Gbps. A minimum bandwidth of 1 Gbps
is provisioned, which can be raised by 100 Mbps increments. The sum of the
minimum bandwidth guaranteed for all vPorts together cannot exceed the
capacity of the physical link. A vPort can also be configured with a maximum
bandwidth.
This mode works with the port scheduler to avoid unintended packet drops due to
policing through EFP metering block. If flow control is enabled, the switch
provides a no‐drop packet forwarding behavior, which improves end‐to‐end
TCP‐throughput performance.
Note: If a vPort is configured with low upper limit, it might lead to head‐of‐line
congestion on the egress port.
ETS mode is disabled when strict bandwidth provisioning mode is enabled. By
default, uplink ports have a separate traffic class for storage traffic with guaranteed
bandwidth. The rest of the bandwidth is shared equally among other traffic.
Use the following command to configure strict bandwidth provisioning:
RS G8264(config_ufp_vport)# qos bandwidth {max|min} <10‐100>
min ­ Set minimum guaranteed bandwidth
max ­ Set maximum allowed bandwidth