Chapter 14. Virtualization - Lenovo Flex System Fabric CN4093 Application Manual

Chapter 14. Virtualization

© Copyright Lenovo 2017
Virtualization allows resources to be allocated in a fluid manner based on the
logical needs of the data center, rather than on the strict, physical nature of
components. The following virtualization features are included in Enterprise NOS
8.4 on the CN4093 10 Gb Converged Scalable Switch (CN4093):
 Virtual Local Area Networks (VLANs)
VLANs are commonly used to split groups of networks into manageable
broadcast domains, create logical segmentation of workgroups, and to enforce
security policies among logical network segments.
For details on this feature, see "VLANs" on page
 Port aggregation
A port LAG pools multiple physical switch ports into a single, high‐bandwidth
logical link to other devices. In addition to aggregating capacity, LAGs provides
link redundancy.
For details on this feature, see "Ports and Link Aggregation (LAG)" on page
 Virtual Network Interface Card (vNIC) support
Some NICs, such as the Emulex Virtual Fabric Adapter, can virtualize NIC
resources, presenting multiple virtual NICs to the server's OS or hypervisor.
Each vNIC appears as a regular, independent NIC with some portion of the
physical NIC's overall bandwidth. ENOS 8.4 supports up to four vNICs over
each internal switch port.
For details on this feature, see "Virtual NICs" on page
 Virtual Link Aggregation Groups (VLAGs)
With VLAGs, two switches can act as a single logical device for the purpose of
establishing port LAGs. Active LAG links from one device can lead to both
VLAG peer switches, providing enhanced redundancy, including active‐active
VRRP configuration.
For details on this feature, see "Virtual Link Aggregation Groups" on page 193
 VMready
The switch's VMready software makes it virtualization aware. Servers that run
hypervisor software with multiple instances of one or more operating systems
can present each as an independent virtual machine (VM). With VMready, the
switch automatically discovers virtual machines (VMs) connected to switch.
For details on this feature, see "VMready" on page
Edge Virtual Bridging (QBG)

The 802.1Qbg/Edge Virtual Bridging (EVB) is an emerging IEEE standard for
allowing networks to become virtual machine (VM)‐aware. EVB bridges the gap
between physical and virtual network resources.
For details on this feature, see "Edge Virtual Bridging" on page
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