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HP FlexFabric Virtual Switch 5900v Technology White Paper

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Figure 8 Port-group based VM connections
VMware ESXiVMware ESXi
HP 5900v VDS
VM
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Station 1 Station 2
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5900v
VCE
Network policies
applied to VMs
HP iMC
vCenter Server
Plug-in
Port group:
•Web
•Emails
• Authentication
• Database
Automatic deployment of network policies for VM
migration
In a virtualization environment, VM failures, dynamic resource scheduling (DRS), server failures, or
planned server stoppage might result in VM migration. To ensure service continuity:
• Network policies for virtual NICs must be migrated.
• Network policies for ToR access switch ports that connect to the servers must be migrated.
Network policies for virtual NICs are stored on the local disk of a server, and they can be copied to the
target server when a VM migration occurs.
Network policies for a ToR access switch port that connects to the server are stored on the ToR access
switch. It is difficult to migrate network policies for a ToR access switch port to another ToR access switch
port when a VM on a server migrates to another server.
To enable migration of network policies for ToR access switch ports, the IEEE 802.1 working group has
drafted a standard called 802.1Qbg Edge Virtual Bridging (EVB) for data center virtualization. It
includes the following:
• Formats and requirements for forwarding inter-VM traffic and traffic between VMs and the external
network.
• A group of control and management protocols for the network with VMs and I/O virtualization
environments.
EVB becomes the pipeline that connects computing resource scheduling and automatic network
connection migration. EVB also passes the network traffic created in VMs to a physical switch attached
to the server for processing. This greatly reduces costs for CPU usage and storage consumption, and
provides more computing resources for services.
EVB is compliant with 802.1Qbg, which is drafted by HP. EVB includes VEB, VEPA, multichannel, and
remote copy of broadcast or multicast traffic by the physical switch.