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BLADEOS 6.5.2 Application Guide
BMD00220, October 2010 Chapter 13: VMready 179
Bandwidth Policies vs. Bandwidth Shaping
VM Profile Bandwidth Shaping differs from VM Policy Bandwidth Control.
VM Profile Bandwidth Shaping (see “VM Profiles” on page 169) is configured per VM group and
is enforced on the server by a virtual switch in the hypervisor. Shaping is unidirectional and limits
traffic transmitted from the virtual switch to the G8124. Shaping is performed prior to transmit VM
Policy Bandwidth Control. If the egress traffic for a virtual switch port group exceeds shaping
parameters, the traffic is dropped by the virtual switch in the hypervisor. Shaping uses server CPU
resources, but prevents extra traffic from consuming bandwidth between the server and the G8124.
Shaping is not supported simultaneously on the same ports as vNICs.
VM Policy Bandwidth Control is configured per VE, and can be set independently for transmit
traffic. Bandwidth policies are enforced by the G8124. VE traffic that exceeds configured levels is
dropped by the switch upon ingress. Setting txrate uses ACL resources on the switch.
Bandwidth shaping and bandwidth policies can be used separately or in concert.