Advanced Storage and Networking Features - Getting Started with Red Hat Enterprise Virtualization - page 127

VNIC QoS
A VNIC profile allows users to create different VNIC profiles with a collection of different
settings, such as network QoS, enable or disable port mirroring, and more, and apply these
profiles to the individual virtual interface card attached to the virtual machines. This feature
will enable the administrator to define a different profile with a custom limit in the inbound
and outbound network traffic based on users or a service level while building a cloud using
Red Hat Enterprise Virtualization.
Network QoS will allow the user to limit the inbound and outbound network traffic in the
virtual NIC level. This kind of traffic shaping allows the network administrator to prevent
overconsumption of network resources by limiting the bandwidth of both inbound and out-
bound traffic at the virtual NIC level.
So, as a first step, we need to define a new QoS profile at the RHEV data center level. To
define a QoS, perform these steps:
1. Log in to the Administrator console and navigate to the Data Center resource
tab.
2. Choose the appropriate data center and select the Network QoS tab from the bot-
tom pane; click on New to create a new network QoS.
3. Enter a name for the new network QoS and define the QoS properties to limit the
inbound and outbound traffic of the profile.
QoS currently includes the following properties:
• Inbound
◦ Average : This is the long-term limit around which traffic should float
(Mbps)
◦ Peak : This is the maximum bandwidth allowed during burst (Mbps)
◦ Burst : This is the burst size (MB)
• Outbound
◦ Average : This is the long-term limit around which traffic should float
(Mbps)
◦ Peak : This is the maximum bandwidth allowed during burst (Mbps)
◦ Burst : This is the burst size (MB)
From the settings shown in the following screenshot, after sending 50 MB with a data rate
of 200 Mbps, the rate will drop to 100 Mbps: