UFP Bandwidth Provisioning
UFP Strict Bandwidth Provisioning Mode
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CN4093 Application Guide for N/OS 8.2
UFP provides one mode of bandwidth provisioning for vPort: Strict Bandwidth
Provisioning Mode.
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.
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:
CN4093(config_ufp_vport)# qos bandwidth {max|min} <10‐100>
min Set minimum guaranteed bandwidth
max Set maximum allowed bandwidth