Vm Policy Bandwidth Control; Vm Policy Bandwidth Control Commands - Lenovo CN4093 Application Manual

VM Policy Bandwidth Control

VM Policy Bandwidth Control Commands

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CN4093 Application Guide for N/OS 8.3
In a virtualized environment where VEs can migrate between hypervisors and
thus move among different ports on the switch, traffic bandwidth policies must be
attached to VEs, rather than to a specific switch port.
VM Policy Bandwidth Control allows the administrator to specify the amount of
data the switch will permit to flow to or from a particular VE, without defining a
complicated matrix of ACLs or VMAPs for all port combinations where a VE may
appear.
VM Policy Bandwidth Control can be configured using the following configuration
commands:
CN 4093(config)# virt vmpolicy vmbwidth <VM MAC>|<index>|<UUID>|
<IPv4 address>|<name> ?
txrate <committed rate> <burst> [<ACL number>]
rxrate <committed rate> <burst>
bwctrl
Bandwidth allocation can be defined either for transmit (TX) traffic or receive (RX)
traffic. Because bandwidth allocation is specified from the perspective of the VE,
the switch command for TX Rate Control (txrate) sets the data rate to be sent
from the VM to the switch, and the RX Rate Control (rxrate) sets the data rate to
be received by the VM from the switch.
The committed rate is specified in multiples of 64 kbps, from 64 to 40,000,000. The
maximum burst rate is specified as 32, 64, 128, 256, 1024, 2048, or 4096 kb. If both
the committed rate and burst are set to 0, bandwidth control in that direction (TX
or RX) will be disabled.
When txrate is specified, the switch automatically selects an available ACL for
internal use with bandwidth control. Optionally, if automatic ACL selection is not
desired, a specific ACL may be selected. If there are no unassigned ACLs available,
txrate cannot be configured.
(Set the VM to switch rate)
(Set the VM received bandwidth)
(Enable bandwidth control)